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• Instantiate a form, then find it later, without showing it initially

  - by awilson53

  I am having a problem that is strange to me but hopefully is not so strange to someone else. : ) Some background: I am working on a simple IM client that allows the user to broadcast messages to multiple recipients. The goal is to create a chat form for each of the recipients containing the text of the broadcast message, then show that form only if the recipient responds to the broadcast-er. However, when the application receives a response then attempts to locate the form for that particular chat session (using Application.OpenForms) it cannot find it UNLESS I .Show at the time it is created. I would like to avoid having to show this form when it is created because this means that the user will see a flash on the screen. The form doesn't seem to really be created until I show it, but it would seem there has to be a way to do this without showing first. Can anyone assist? I can provide code snippets if needed, I didn't in this post because this feels more like a conceptual misunderstanding on my part than a bug in the code. Thanks in advance!

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• SharePoint threw "Unknown SQL Exception 206 occured." Anyone familiar with this?

  - by dalehhirt

  Our SharePoint instance threw the following errors when attempting to access data through a Content Query Tool: 04/02/2010 10:45:06.12 w3wp.exe (0x062C) 0x1734 Windows SharePoint Services Database 5586 Critical Unknown SQL Exception 206 occured. Additional error information from SQL Server is included below. Operand type clash: uniqueidentifier is incompatible with datetime 04/02/2010 10:45:06.25 w3wp.exe (0x062C) 0x1734 Office Server Office Server General 900n Critical A runtime exception was detected. Details follow. Message: Operand type clash: uniqueidentifier is incompatible with datetime Techinal Details: System.Data.SqlClient.SqlException: Operand type clash: uniqueidentifier is incompatible with datetime at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlDataReader.ConsumeMetaData(... 04/02/2010 10:45:06.25* w3wp.exe (0x062C) 0x1734 Office Server Office Server General 900n Critical ...) at System.Data.SqlClient.SqlDataReader.get_MetaData() at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) at System.Data.SqlClient.SqlC 04/02/2010 10:45:06.25 w3wp.exe (0x062C) 0x1734 CMS Publishing 8vyd Exception (Watson Reporting Cancelled) System.Data.SqlClient.SqlException: Operand type clash: uniqueidentifier is incompatible with datetime at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlDataReader.ConsumeMetaData() at System.Data.SqlClient.SqlDataReader.get_MetaData() at System.Data.SqlClient.SqlCommand.FinishExecuteRead... 04/02/2010 10:45:06.25* w3wp.exe (0x062C) 0x1734 CMS Publishing 8vyd Exception ...er(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior) at Microsoft.SharePoint.Utilities.SqlSession.ExecuteReader(SqlCommand command, ... 04/02/2010 10:45:06.25* w3wp.exe (0x062C) 0x1734 CMS Publishing 8vyd Exception ...CommandBehavior behavior) at Microsoft.SharePoint.SPSqlClient.ExecuteQuery(Boolean& bSucceed) at Microsoft.SharePoint.Library.SPRequestInternalClass.CrossListQuery(String bstrUrl, String bstrXmlWebs, String bstrXmlLists, String bstrXmlQuery, ISP2DSafeArrayWriter pCallback, Object& pvarColumns) at Microsoft.SharePoint.Library.SPRequest.CrossListQuery(String bstrUrl, String bstrXmlWebs, String bstrXmlLists, String bstrXmlQuery, ISP2DSafeArrayWriter pCallback, Object& pvarColumns) at Microsoft.SharePoint.SPWeb.GetSiteData(SPSiteDataQuery query) at Microsoft.SharePoint.Publishing.CachedArea.GetCrossListQuery(SPSiteDataQuery query, SPWeb currentContext) at Microsoft.SharePoint.Publishing.CrossListQueryCache.GetSiteData(CachedArea cachedArea, SPWeb web, SPSiteDataQuery qu... 04/02/2010 10:45:06.25* w3wp.exe (0x062C) 0x1734 CMS Publishing 8vyd Exception ...ery) 04/02/2010 10:45:06.25 w3wp.exe (0x062C) 0x1734 CMS Publishing 78ed Warning Error occured while processing a Content Query Web Part. Performing the following query ' 04/02/2010 10:45:06.25* w3wp.exe (0x062C) 0x1734 CMS Publishing 78ed Warning ...ue" Type="Number"/ The farm is MOSS 2007 with SQL Server 2005 backend. Any ideas are welcomed. Dale

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• JBoss AS 5: starts but can't connect (Windows, remote)

  - by Nuwan

  Hello I installed Jboss 5.0GA and Its works fine in localhost.But I want It to access through remote Machine.Then I bind my IP address to my server and started it.This is the command I used run.bat -b 10.17.62.63 Then the server Starts fine This is the console log when starting the server > =============================================================================== > > JBoss Bootstrap Environment > > JBOSS_HOME: C:\jboss-5.0.0.GA > > JAVA: C:\Program Files\Java\jdk1.6.0_34\bin\java > > JAVA_OPTS: -Dprogram.name=run.bat -server -Xms128m -Xmx512m > -XX:MaxPermSize=25 6m -Dorg.jboss.resolver.warning=true -Dsun.rmi.dgc.client.gcInterval=3600000 -Ds un.rmi.dgc.server.gcInterval=3600000 > > CLASSPATH: C:\jboss-5.0.0.GA\bin\run.jar > > =============================================================================== > > run.bat: unused non-option argument: ûb run.bat: unused non-option > argument: 0.0.0.0 13:43:38,179 INFO [ServerImpl] Starting JBoss > (Microcontainer)... 13:43:38,179 INFO [ServerImpl] Release ID: JBoss > [Morpheus] 5.0.0.GA (build: SV NTag=JBoss_5_0_0_GA date=200812041714) > 13:43:38,179 INFO [ServerImpl] Bootstrap URL: null 13:43:38,179 INFO > [ServerImpl] Home Dir: C:\jboss-5.0.0.GA 13:43:38,179 INFO > [ServerImpl] Home URL: file:/C:/jboss-5.0.0.GA/ 13:43:38,195 INFO > [ServerImpl] Library URL: file:/C:/jboss-5.0.0.GA/lib/ 13:43:38,195 > INFO [ServerImpl] Patch URL: null 13:43:38,195 INFO [ServerImpl] > Common Base URL: file:/C:/jboss-5.0.0.GA/common/ > > 13:43:38,195 INFO [ServerImpl] Common Library URL: > file:/C:/jboss-5.0.0.GA/comm on/lib/ 13:43:38,195 INFO [ServerImpl] > Server Name: default 13:43:38,195 INFO [ServerImpl] Server Base Dir: > C:\jboss-5.0.0.GA\server 13:43:38,195 INFO [ServerImpl] Server Base > URL: file:/C:/jboss-5.0.0.GA/server/ > > 13:43:38,210 INFO [ServerImpl] Server Config URL: > file:/C:/jboss-5.0.0.GA/serve r/default/conf/ 13:43:38,210 INFO > [ServerImpl] Server Home Dir: C:\jboss-5.0.0.GA\server\defaul t > 13:43:38,210 INFO [ServerImpl] Server Home URL: > file:/C:/jboss-5.0.0.GA/server/ default/ 13:43:38,210 INFO > [ServerImpl] Server Data Dir: C:\jboss-5.0.0.GA\server\defaul t\data > 13:43:38,210 INFO [ServerImpl] Server Library URL: > file:/C:/jboss-5.0.0.GA/serv er/default/lib/ 13:43:38,210 INFO > [ServerImpl] Server Log Dir: C:\jboss-5.0.0.GA\server\default \log > 13:43:38,210 INFO [ServerImpl] Server Native Dir: > C:\jboss-5.0.0.GA\server\defa ult\tmp\native 13:43:38,210 INFO > [ServerImpl] Server Temp Dir: C:\jboss-5.0.0.GA\server\defaul t\tmp > 13:43:38,210 INFO [ServerImpl] Server Temp Deploy Dir: > C:\jboss-5.0.0.GA\server \default\tmp\deploy 13:43:39,710 INFO > [ServerImpl] Starting Microcontainer, bootstrapURL=file:/C:/j > boss-5.0.0.GA/server/default/conf/bootstrap.xml 13:43:40,851 INFO > [VFSCacheFactory] Initializing VFSCache [org.jboss.virtual.pl > ugins.cache.IterableTimedVFSCache] 13:43:40,866 INFO > [VFSCacheFactory] Using VFSCache [IterableTimedVFSCache{lifet > ime=1800, resolution=60}] 13:43:41,616 INFO [CopyMechanism] VFS temp > dir: C:\jboss-5.0.0.GA\server\defaul t\tmp 13:43:41,648 INFO > [ZipEntryContext] VFS force nested jars copy-mode is enabled. > > 13:43:44,288 INFO [ServerInfo] Java version: 1.6.0_34,Sun > Microsystems Inc. 13:43:44,288 INFO [ServerInfo] Java VM: Java > HotSpot(TM) Server VM 20.9-b04,Sun Microsystems Inc. 13:43:44,288 > INFO [ServerInfo] OS-System: Windows XP 5.1,x86 13:43:44,569 INFO > [JMXKernel] Legacy JMX core initialized 13:43:50,148 INFO > [ProfileServiceImpl] Loading profile: default from: org.jboss > .system.server.profileservice.repository.SerializableDeploymentRepository@e72f0c > (root=C:\jboss-5.0.0.GA\server, > key=org.jboss.profileservice.spi.ProfileKey@143b > 82c3[domain=default,server=default,name=default]) 13:43:50,148 INFO > [ProfileImpl] Using repository:org.jboss.system.server.profil > eservice.repository.SerializableDeploymentRepository@e72f0c(root=C:\jboss-5.0.0. > GA\server, > key=org.jboss.profileservice.spi.ProfileKey@143b82c3[domain=default,s > erver=default,name=default]) 13:43:50,148 INFO [ProfileServiceImpl] > Loaded profile: ProfileImpl@8b3bb3{key=o > rg.jboss.profileservice.spi.ProfileKey@143b82c3[domain=default,server=default,na > me=default]} 13:43:54,804 INFO [WebService] Using RMI server > codebase: http://127.0.0.1:8083 / 13:44:12,147 INFO [CXFServerConfig] > JBoss Web Services - Stack CXF Runtime Serv er 13:44:12,147 INFO > [CXFServerConfig] 3.1.2.GA 13:44:29,788 INFO > [Ejb3DependenciesDeployer] Encountered deployment AbstractVFS > DeploymentContext@29776073{vfszip:/C:/jboss-5.0.0.GA/server/default/deploy/myE-e > jb.jar} 13:44:29,819 INFO [Ejb3DependenciesDeployer] Encountered > deployment AbstractVFS > DeploymentContext@29776073{vfszip:/C:/jboss-5.0.0.GA/server/default/deploy/myE-e > jb.jar} 13:44:29,819 INFO [Ejb3DependenciesDeployer] Encountered > deployment AbstractVFS > DeploymentContext@29776073{vfszip:/C:/jboss-5.0.0.GA/server/default/deploy/myE-e > jb.jar} 13:44:29,819 INFO [Ejb3DependenciesDeployer] Encountered > deployment AbstractVFS > DeploymentContext@29776073{vfszip:/C:/jboss-5.0.0.GA/server/default/deploy/myE-e > jb.jar} 13:44:37,116 INFO [JMXConnectorServerService] JMX Connector > server: service:jmx > :rmi://127.0.0.1/jndi/rmi://127.0.0.1:1090/jmxconnector 13:44:38,022 > INFO [MailService] Mail Service bound to java:/Mail 13:44:43,162 WARN > [JBossASSecurityMetadataStore] WARNING! POTENTIAL SECURITY RI SK. It > has been detected that the MessageSucker component which sucks > messages f rom one node to another has not had its password changed > from the installation d efault. Please see the JBoss Messaging user > guide for instructions on how to do this. 13:44:43,209 WARN > [AnnotationCreator] No ClassLoader provided, using TCCL: org. > jboss.managed.api.annotation.ManagementComponent 13:44:43,600 INFO > [TransactionManagerService] JBossTS Transaction Service (JTA version) > - JBoss Inc. 13:44:43,600 INFO [TransactionManagerService] Setting up property manager MBean and JMX layer 13:44:44,366 INFO > [TransactionManagerService] Initializing recovery manager 13:44:44,678 > INFO [TransactionManagerService] Recovery manager configured > 13:44:44,678 INFO [TransactionManagerService] Binding > TransactionManager JNDI R eference 13:44:44,787 INFO > [TransactionManagerService] Starting transaction recovery man ager > 13:44:46,428 INFO [Http11Protocol] Initializing Coyote HTTP/1.1 on > http-127.0.0 .1-8080 13:44:46,459 INFO [AjpProtocol] Initializing > Coyote AJP/1.3 on ajp-127.0.0.1-80 09 13:44:46,459 INFO > [StandardService] Starting service jboss.web 13:44:46,475 INFO > [StandardEngine] Starting Servlet Engine: JBoss Web/2.1.1.GA > 13:44:46,616 INFO [Catalina] Server startup in 350 ms 13:44:46,709 > INFO [TomcatDeployment] deploy, ctxPath=/web-console, vfsUrl=manag > ement/console-mgr.sar/web-console.war 13:44:48,553 INFO > [TomcatDeployment] deploy, ctxPath=/juddi, vfsUrl=juddi-servi > ce.sar/juddi.war 13:44:48,678 INFO [RegistryServlet] Loading jUDDI > configuration. 13:44:48,694 INFO [RegistryServlet] Resources loaded > from: /WEB-INF/juddi.prope rties 13:44:48,709 INFO [RegistryServlet] > Initializing jUDDI components. 13:44:48,991 INFO [TomcatDeployment] > deploy, ctxPath=/invoker, vfsUrl=http-invo ker.sar/invoker.war > 13:44:49,162 INFO [TomcatDeployment] deploy, ctxPath=/jbossws, > vfsUrl=jbossws.s ar/jbossws-management.war 13:44:49,475 INFO > [RARDeployment] Required license terms exist, view vfszip:/C: > /jboss-5.0.0.GA/server/default/deploy/jboss-local-jdbc.rar/META-INF/ra.xml > 13:44:49,569 INFO [RARDeployment] Required license terms exist, view > vfszip:/C: > /jboss-5.0.0.GA/server/default/deploy/jboss-xa-jdbc.rar/META-INF/ra.xml > 13:44:49,741 INFO [RARDeployment] Required license terms exist, view > vfszip:/C: > /jboss-5.0.0.GA/server/default/deploy/jms-ra.rar/META-INF/ra.xml > 13:44:49,819 INFO [RARDeployment] Required license terms exist, view > vfszip:/C: > /jboss-5.0.0.GA/server/default/deploy/mail-ra.rar/META-INF/ra.xml > 13:44:49,912 INFO [RARDeployment] Required license terms exist, view > vfszip:/C: > /jboss-5.0.0.GA/server/default/deploy/quartz-ra.rar/META-INF/ra.xml > 13:44:50,069 INFO [SimpleThreadPool] Job execution threads will use > class loade r of thread: main 13:44:50,115 INFO [QuartzScheduler] > Quartz Scheduler v.1.5.2 created. 13:44:50,131 INFO [RAMJobStore] > RAMJobStore initialized. 13:44:50,131 INFO [StdSchedulerFactory] > Quartz scheduler 'DefaultQuartzSchedule r' initialized from default > resource file in Quartz package: 'quartz.properties' > > 13:44:50,131 INFO [StdSchedulerFactory] Quartz scheduler version: > 1.5.2 13:44:50,131 INFO [QuartzScheduler] Scheduler DefaultQuartzScheduler_$_NON_CLUS TERED started. 13:44:51,194 INFO > [ConnectionFactoryBindingService] Bound ConnectionManager 'jb > oss.jca:service=DataSourceBinding,name=DefaultDS' to JNDI name > 'java:DefaultDS' 13:44:51,819 WARN [QuartzTimerServiceFactory] sql > failed: CREATE TABLE QRTZ_JOB > _DETAILS(JOB_NAME VARCHAR(80) NOT NULL, JOB_GROUP VARCHAR(80) NOT NULL, DESCRIPT ION VARCHAR(120) NULL, JOB_CLASS_NAME VARCHAR(128) NOT > NULL, IS_DURABLE VARCHAR( 1) NOT NULL, IS_VOLATILE VARCHAR(1) NOT > NULL, IS_STATEFUL VARCHAR(1) NOT NULL, R EQUESTS_RECOVERY VARCHAR(1) > NOT NULL, JOB_DATA BINARY NULL, PRIMARY KEY (JOB_NAM E,JOB_GROUP)) > 13:44:51,912 INFO [SimpleThreadPool] Job execution threads will use > class loade r of thread: main 13:44:51,928 INFO [QuartzScheduler] > Quartz Scheduler v.1.5.2 created. 13:44:51,928 INFO [JobStoreCMT] > Using db table-based data access locking (synch ronization). > 13:44:51,944 INFO [JobStoreCMT] Removed 0 Volatile Trigger(s). > 13:44:51,944 INFO [JobStoreCMT] Removed 0 Volatile Job(s). > 13:44:51,944 INFO [JobStoreCMT] JobStoreCMT initialized. 13:44:51,944 > INFO [StdSchedulerFactory] Quartz scheduler 'JBossEJB3QuartzSchedu > ler' initialized from an externally provided properties instance. > 13:44:51,959 INFO [StdSchedulerFactory] Quartz scheduler version: > 1.5.2 13:44:51,959 INFO [JobStoreCMT] Freed 0 triggers from 'acquired' / 'blocked' st ate. 13:44:51,975 INFO [JobStoreCMT] > Recovering 0 jobs that were in-progress at the time of the last > shut-down. 13:44:51,975 INFO [JobStoreCMT] Recovery complete. > 13:44:51,975 INFO [JobStoreCMT] Removed 0 'complete' triggers. > 13:44:51,975 INFO [JobStoreCMT] Removed 0 stale fired job entries. > 13:44:51,990 INFO [QuartzScheduler] Scheduler > JBossEJB3QuartzScheduler_$_NON_CL USTERED started. 13:44:52,381 INFO > [ServerPeer] JBoss Messaging 1.4.1.GA server [0] started 13:44:52,569 > INFO [QueueService] Queue[/queue/DLQ] started, fullSize=200000, pa > geSize=2000, downCacheSize=2000 13:44:52,584 INFO [QueueService] > Queue[/queue/ExpiryQueue] started, fullSize=20 0000, pageSize=2000, > downCacheSize=2000 13:44:52,709 INFO [ConnectionFactory] Connector > bisocket://127.0.0.1:4457 has l easing enabled, lease period 10000 > milliseconds 13:44:52,709 INFO [ConnectionFactory] > org.jboss.jms.server.connectionfactory.Co nnectionFactory@1a8ac5e > started 13:44:52,725 WARN [ConnectionFactoryJNDIMapper] > supportsFailover attribute is t rue on connection factory: > jboss.messaging.connectionfactory:service=ClusteredCo nnectionFactory > but post office is non clustered. So connection factory will *no t* > support failover 13:44:52,725 WARN [ConnectionFactoryJNDIMapper] > supportsLoadBalancing attribute is true on connection factory: > jboss.messaging.connectionfactory:service=Cluste redConnectionFactory > but post office is non clustered. So connection factory wil l *not* > support load balancing 13:44:52,740 INFO [ConnectionFactory] > Connector bisocket://127.0.0.1:4457 has l easing enabled, lease period > 10000 milliseconds 13:44:52,740 INFO [ConnectionFactory] > org.jboss.jms.server.connectionfactory.Co nnectionFactory@1d43178 > started 13:44:52,740 INFO [ConnectionFactory] Connector > bisocket://127.0.0.1:4457 has l easing enabled, lease period 10000 > milliseconds 13:44:52,756 INFO [ConnectionFactory] > org.jboss.jms.server.connectionfactory.Co nnectionFactory@52728a > started 13:44:53,084 INFO [ConnectionFactoryBindingService] Bound > ConnectionManager 'jb > oss.jca:service=ConnectionFactoryBinding,name=JmsXA' to JNDI name > 'java:JmsXA' 13:44:53,225 INFO [TomcatDeployment] deploy, ctxPath=/, > vfsUrl=ROOT.war 13:44:53,553 INFO [TomcatDeployment] deploy, > ctxPath=/jmx-console, vfsUrl=jmx-c onsole.war 13:44:53,975 INFO > [TomcatDeployment] deploy, ctxPath=/TestService, vfsUrl=TestS > erviceEAR.ear/TestService.war 13:44:55,662 INFO [JBossASKernel] > Created KernelDeployment for: myE-ejb.jar 13:44:55,709 INFO > [JBossASKernel] installing bean: jboss.j2ee:jar=myE-ejb.jar,n > ame=RPSService,service=EJB3 13:44:55,725 INFO [JBossASKernel] with > dependencies: 13:44:55,725 INFO [JBossASKernel] and demands: > 13:44:55,725 INFO [JBossASKernel] > jboss.ejb:service=EJBTimerService 13:44:55,725 INFO [JBossASKernel] > and supplies: 13:44:55,725 INFO [JBossASKernel] > jndi:RPSService/remote 13:44:55,725 INFO [JBossASKernel] Added > bean(jboss.j2ee:jar=myE-ejb.jar,name=RP SService,service=EJB3) to > KernelDeployment of: myE-ejb.jar 13:44:56,772 INFO > [SessionSpecContainer] Starting jboss.j2ee:jar=myE-ejb.jar,na > me=RPSService,service=EJB3 13:44:56,803 INFO [EJBContainer] STARTED > EJB: com.monz.rpz.RPSService ejbName: RPSService 13:44:56,819 INFO > [JndiSessionRegistrarBase] Binding the following Entries in G lobal > JNDI: > > > 13:44:57,381 INFO [DefaultEndpointRegistry] register: > jboss.ws:context=myE-ejb, endpoint=RPSService 13:44:57,428 INFO > [DescriptorDeploymentAspect] Add Service id=RPSService > address=http://127.0.0.1:8080/myE-ejb/RPSService > implementor=com.monz.rpz.RPSService > invoker=org.jboss.wsf.stack.cxf.InvokerEJB3 mtomEnabled=false > 13:44:57,459 INFO [DescriptorDeploymentAspect] JBossWS-CXF > configuration genera ted: > file:/C:/jboss-5.0.0.GA/server/default/tmp/jbossws/jbossws-cxf1864137209199 > 110130.xml 13:44:57,569 INFO [TomcatDeployment] deploy, ctxPath=/myE-ejb, vfsUrl=myE-ejb.j ar 13:44:57,709 WARN [config] > Unable to process deployment descriptor for context '/myE-ejb' > 13:44:59,334 INFO [Http11Protocol] Starting Coyote HTTP/1.1 on > http-127.0.0.1-8 080 13:44:59,397 INFO [AjpProtocol] Starting Coyote > AJP/1.3 on ajp-127.0.0.1-8009 13:44:59,459 INFO [ServerImpl] JBoss > (Microcontainer) [5.0.0.GA (build: SVNTag= JBoss_5_0_0_GA > date=200812041714)] Started in 1m:21s:233ms But Still I cant connect to It when I Type my IP address in my browser thanks

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• Nginx and PHP-FPM running out of connections

  - by E3pO

  I keep running into errors like these, [02-Jun-2012 01:52:04] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 19 idle, and 49 total children [02-Jun-2012 01:52:05] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 16 children, there are 19 idle, and 50 total children [02-Jun-2012 01:52:06] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 32 children, there are 19 idle, and 51 total children [02-Jun-2012 03:10:51] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 18 idle, and 91 total children I changed my settings for php-fpm to these, pm.max_children = 150 (It was at 100, i got a max_children reached and upped to 150) pm.start_servers = 75 pm.min_spare_servers = 20 pm.max_spare_servers = 150 Resulting in [02-Jun-2012 01:39:19] WARNING: [pool www] server reached pm.max_children setting (150), consider raising it I've just launched a new website that is getting a conciderable amount of traffic on it. This traffic is legitimate and users are getting 504 gateway timeouts when the limit is reached. I have limited connections to my server with IPTABLES and I'm running fail2ban and keeping track of nginx access logs. The traffic is all legitimate, i'm just running out of room for users. I'm currently running on a dual core box with ubuntu 64bit. free total used free shared buffers cached Mem: 6114284 5726984 387300 0 141612 4985384 -/+ buffers/cache: 599988 5514296 Swap: 524284 5804 518480 My php.ini max_input_time = 60 My nginx config is worker_processes 4; pid /var/run/nginx.pid; events { worker_connections 19000; # multi_accept on; } worker_rlimit_nofile 20000; #each connection needs a filehandle (or 2 if you are proxying) client_max_body_size 30M; client_body_timeout 10; client_header_timeout 10; keepalive_timeout 5 5; send_timeout 10; location ~ \.php$ { try_files $uri /er/error.php; fastcgi_split_path_info ^(.+\.php)(/.+)$; fastcgi_connect_timeout 60; fastcgi_send_timeout 180; fastcgi_read_timeout 180; fastcgi_buffer_size 128k; fastcgi_buffers 256 16k; fastcgi_busy_buffers_size 256k; fastcgi_temp_file_write_size 256k; fastcgi_max_temp_file_size 0; fastcgi_intercept_errors on; fastcgi_pass unix:/tmp/php5-fpm.sock; fastcgi_index index.php; include fastcgi_params; } What can I do to stop running out of connections? Why does this keep occurring? I'm monitoring my traffic on Google Analytics realtime and when the user count gets above about 120 my php-fpm.log is full of these warnings..

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• Drupal views pane content not visible

  - by jwandborg

  I have a pane on my front page with one content pane and two views panes. I can't see the content of the third view ($pane->pid = "new-3" / comment: # Senaste bilder). Here's my panel <?php $page = new stdClass; $page->disabled = FALSE; /* Edit this to true to make a default page disabled initially */ $page->api_version = 1; $page->name = 'frontpage'; $page->task = 'page'; $page->admin_title = 'Startsida'; $page->admin_description = ''; $page->path = 'hem'; $page->access = array(); $page->menu = array(); $page->arguments = array(); $page->conf = array(); $page->default_handlers = array(); $handler = new stdClass; $handler->disabled = FALSE; /* Edit this to true to make a default handler disabled initially */ $handler->api_version = 1; $handler->name = 'page_frontpage_panel_context'; $handler->task = 'page'; $handler->subtask = 'frontpage'; $handler->handler = 'panel_context'; $handler->weight = 0; $handler->conf = array( 'title' => 'Panel', 'no_blocks' => FALSE, 'css_id' => '', 'css' => '', 'contexts' => array(), 'relationships' => array(), ); $display = new panels_display; $display->layout = 'onecol'; $display->layout_settings = array(); $display->panel_settings = array(); $display->cache = array(); $display->title = ''; $display->content = array(); $display->panels = array(); # Bild $pane = new stdClass; $pane->pid = 'new-1'; $pane->panel = 'middle'; $pane->type = 'custom'; $pane->subtype = 'custom'; $pane->shown = TRUE; $pane->access = array(); $pane->configuration = array( 'admin_title' => '', 'title' => '', 'body' => '<img src="/sites/all/themes/zen/ils-2010/img/graphics-start-text-v3.png" alt="Hej! Vi vet att du och dina klasskompisar har mycket att tänka på under er sista termin i gymnasiet. Därför har vi samlat några saker som vi tror kommer göra er studenttid lite roligare och lite enklare. Välkommen!" />', 'format' => '2', 'substitute' => TRUE, ); $pane->cache = array(); $pane->style = array(); $pane->css = array(); $pane->extras = array(); $pane->position = 0; $display->content['new-1'] = $pane; $display->panels['middle'][0] = 'new-1'; # Topplista $pane = new stdClass; $pane->pid = 'new-2'; $pane->panel = 'middle'; $pane->type = 'views_panes'; $pane->subtype = 'topplista_terms-panel_pane_1'; $pane->shown = TRUE; $pane->access = array(); $pane->configuration = array( 'link_to_view' => 1, 'more_link' => 0, 'use_pager' => 0, 'pager_id' => '', 'items_per_page' => '10', 'offset' => '0', 'path' => 'flaktavling/topplista/klasser', 'override_title' => 0, 'override_title_text' => '', ); $pane->cache = array(); $pane->style = array(); $pane->css = array(); $pane->extras = array(); $pane->position = 1; $display->content['new-2'] = $pane; $display->panels['middle'][1] = 'new-2'; # Senaste bilder $pane = new stdClass; $pane->pid = 'new-3'; $pane->panel = 'middle'; $pane->type = 'views_panes'; $pane->subtype = 'senaste_bilderna-panel_pane_1'; $pane->shown = TRUE; $pane->access = array(); $pane->configuration = array( 'link_to_view' => 0, 'more_link' => 0, 'use_pager' => 0, 'pager_id' => '', 'items_per_page' => '2', 'offset' => '0', 'path' => 'galleri/senaste-bilder', 'override_title' => 0, 'override_title_text' => '', ); $pane->cache = array(); $pane->style = array(); $pane->css = array( 'css_id' => 'pane-senaste-bilderna', 'css_class' => '', ); $pane->extras = array(); $pane->position = 2; $display->content['new-3'] = $pane; $display->panels['middle'][2] = 'new-3'; $display->hide_title = PANELS_TITLE_FIXED; $display->title_pane = 'new-1'; $handler->conf['display'] = $display; $page->default_handlers[$handler->name] = $handler; Here´s the view senaste_bilderna <?php $view = new view; $view->name = 'senaste_bilderna'; $view->description = ''; $view->tag = ''; $view->view_php = ''; $view->base_table = 'node'; $view->is_cacheable = FALSE; $view->api_version = 2; $view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */ $handler = $view->new_display('default', 'Förvalt', 'default'); $handler->override_option('fields', array( 'field_picture_fid' => array( 'id' => 'field_picture_fid', 'table' => 'node_data_field_picture', 'field' => 'field_picture_fid', ), )); $handler->override_option('sorts', array( 'created' => array( 'order' => 'DESC', 'granularity' => 'second', 'id' => 'created', 'table' => 'node', 'field' => 'created', 'relationship' => 'none', ), )); $handler->override_option('filters', array( 'type' => array( 'operator' => 'in', 'value' => array( 'ils_picture' => 'ils_picture', ), 'group' => '0', 'exposed' => FALSE, 'expose' => array( 'operator' => FALSE, 'label' => '', ), 'id' => 'type', 'table' => 'node', 'field' => 'type', 'override' => array( 'button' => 'Åsidosätt', ), 'relationship' => 'none', ), )); $handler->override_option('access', array( 'type' => 'none', )); $handler->override_option('cache', array( 'type' => 'none', )); $handler->override_option('title', 'Senaste bilderna från galleriet'); $handler->override_option('items_per_page', 2); $handler->override_option('row_options', array( 'inline' => array( 'field_picture_fid' => 'field_picture_fid', ), 'separator' => '', 'hide_empty' => 0, )); $handler = $view->new_display('panel_pane', 'Content pane', 'panel_pane_1'); $handler->override_option('pane_title', ''); $handler->override_option('pane_description', ''); $handler->override_option('pane_category', array( 'name' => 'View panes', 'weight' => 0, )); $handler->override_option('allow', array( 'use_pager' => FALSE, 'items_per_page' => FALSE, 'offset' => FALSE, 'link_to_view' => FALSE, 'more_link' => FALSE, 'path_override' => FALSE, 'title_override' => FALSE, 'exposed_form' => FALSE, )); $handler->override_option('argument_input', array()); $handler->override_option('link_to_view', 0); $handler->override_option('inherit_panels_path', 0); $handler = $view->new_display('page', 'Sida', 'page_1'); $handler->override_option('path', 'galleri/senaste-bilderna'); $handler->override_option('menu', array( 'type' => 'none', 'title' => '', 'description' => '', 'weight' => 0, 'name' => 'navigation', )); $handler->override_option('tab_options', array( 'type' => 'none', 'title' => '', 'description' => '', 'weight' => 0, )); I have edited one views template, here's the code in the file views-view-fields--senaste-bilderna.tpl.php <?php // $Id: views-view-fields.tpl.php,v 1.6 2008/09/24 22:48:21 merlinofchaos Exp $ /** * @file views-view-fields.tpl.php * Default simple view template to all the fields as a row. * * - $view: The view in use. * - $fields: an array of $field objects. Each one contains: * - $field->content: The output of the field. * - $field->raw: The raw data for the field, if it exists. This is NOT output safe. * - $field->class: The safe class id to use. * - $field->handler: The Views field handler object controlling this field. Do not use * var_export to dump this object, as it can't handle the recursion. * - $field->inline: Whether or not the field should be inline. * - $field->inline_html: either div or span based on the above flag. * - $field->separator: an optional separator that may appear before a field. * - $row: The raw result object from the query, with all data it fetched. * * @ingroup views_templates */ ?> <?php foreach ($fields as $id => $field): ?> <?php $result = db_query('SELECT * FROM {files} WHERE fid = ' . $row->node_data_field_picture_field_picture_fid ); ?> <?php $data = db_fetch_object( $result ); ?> <div id="senaste-bilderna-first"><img src="<?= imagecache_create_url('senaste_bilderna_thumbnail', $data->filepath) ?>" alt="" /></div> <?php /* if (!empty($field->separator)): <?php print $field->separator; <?php endif; <<?php print $field->inline_html; class="views-field-<?php print $field->class; "> <?php if ($field->label): <label class="views-label-<?php print $field->class; "> <?php print $field->label; : </label> <?php endif; <?php // $field->element_type is either SPAN or DIV depending upon whether or not // the field is a 'block' element type or 'inline' element type. <<?php print $field->element_type; class="field-content"><?php print $field->content; </<?php print $field->element_type; > </<?php print $field->inline_html;> <?php*/ endforeach; ?> This is the result <div class="panel-separator"> </div> <div class="panel-pane pane-views-panes pane-senaste-bilderna-panel-pane-1" id="pane-senaste-bilderna"> <h2 class="pane-title">Senaste bilderna från galleriet </h2> <div class="pane-content"> <div class="view view-senaste-bilderna view-id-senaste_bilderna view-display-id-panel_pane_1 view-dom-id-2"> <div class="view-content"> <div class="views-row views-row-1 views-row-odd views-row-first"> </div> <div class="views-row views-row-2 views-row-even views-row-last"> </div> </div> </div> </div> </div> My Drupal version is 6.16

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• Ich bin jetzt Oracle Certified Associate!

  - by britta.wolf

  Jan Peuker, Absolvent der Hochschule Augsburg und University of Melbourne, hat vor kurzem das Zertifikat Oracle Database 10g Administrator Certified Associate erworben. Er hat uns netterweise mit diesem kleinen Text versorgt: "Die Oracle Zertifizierung beginnt üblicherweise mit dem Oracle Certified Associate. Für diese Zertifizierung ist noch keine tiefgehende Praxiserfahrung notwendig. Um den Titel des Oracle Database 11g Administrator Certified Associate zu erlangen, muss man eine Prüfung zu SQL (z.B. 1Z0-051) sowie eine Prüfung zur Administration (1Z0-045) ablegen. Beide Prüfungen dauern 2 Stunden und haben ca. 80 Fragen von denen etwa drei Viertel richtig beantwortet werden müssen, um zu bestehen. Eine Note gibt es nicht. Die Prüfungen finden immer elektronisch statt, die Software erlaubt das Überspringen und Markieren von Fragen. Während meiner Arbeitszeit nach meinem ersten Studium hatte ich häufig mit dem Oracle Datenbanksystem zu tun. Als ich mein Aufbaustudium an der University of Melbourne absolvierte, wurde mir von der Studienberaterin vorgeschlagen, den Kurs „Advanced Database Administration" zu belegen. Dieser beruht vollständig auf den offiziellen Oracle Trainings-Unterlagen zur Prüfung in Oracle Administration und erlaubt daher die Teilnahme an der offiziellen Zertifizierung. Im Gegensatz zur SQL Prüfung, deren Inhalt man sich gut selbst aneignen kann, hilft bei der Administrator-Zertifizierung ein echter Kurs mit Seminar ungemein. Viele Konzepte lassen sich schwer aus einem Buch lernen. Die Bestandteile der SGA oder das Anlegen von Benutzern mögen leicht zugänglich sein, Redo- und Undo-Management sowie Backup und Recovery kann man nur verstehen, wenn man Beispiele hat und diese an einem Testsystem (keine "kleine" XE-Datenbank, sondern eine "richtige" Datenbank mit Enterprise Manager) ausprobieren kann. Übermäßig viel Zeit habe ich keinesfalls investiert, weil das Grundsystem sehr logisch ist. Für die weniger nachvollziehbaren Bereiche, besonders die neuen Features, habe ich mir Fachbegriffe auf Lernkarten geschrieben und die Trainingsunterlagen am System durchgespielt. Die Prüfung war für mich überraschend schwer, weil das einfache "Tagesgeschäft" deutlich unterrepräsentiert ist. In den Multiple-Choice-Fragen werden viele Besonderheiten und Use-Cases abgefragt (online findet man viele Beispielfragen). Da beide Tests in Englisch sind, sollte man nicht nur in der Terminologie des Oracle Datenbanksystems sondern auch in Fachbegriffen der Datenbankwelt allgemein bewandert sein. Oft machen einzelne Wörter (z.B. redundant oder synchronized, redo log oder redo log buffer) die richtige Antwort aus, ein signifikanter Anteil der Fragen beruht auf Zeichnungen oder Diagrammen, die beschrieben werden müssen. So muss man z.B. anhand eines Log-Auszugs beurteilen, warum die Datenbank nicht sauber geschlossen wurde. Allgemeines Wissen über Datenbanksysteme hilft leider nicht viel, da überproportional viele Fragen zu Oracle-spezifischen Themen gestellt werden, wie z.B. Optimierungs-Dienste (ADDM), Flashback, SQL Loader und ein wenig PL/SQL. Die SQL Prüfung ist dagegen sehr geradlinig - was aber nicht einfacher heißt. Hier kommt es mehr auf Auswendiglernen von Syntax an, was mir persönlich nicht liegt. Vor allem als Anwendungsprogrammierer kennt man oft proprietäre SQL-Funktionen nicht, es fällt schwer, sich einzelne Datumsberechnungsfunktionen, Typkonvertierungen, Namespaces oder krude Join-Methoden zu merken. Auf all dies wird in der Prüfung aber sehr viel Wert gelegt. Auch hier wird man wieder mit zweideutigen Multiple-Choice Fragen konfrontiert, bei denen sich z.B. nur die Reihenfolge der Parameter unterscheidet. Zudem sind die Parameter auch nicht ausgeschrieben, sondern in einem Entity-Relationship-Diagramm gegeben, wobei man auf die richtigen Datentypen achten muss. Mir persönlich war die Zeit fast zu knapp bemessen, weil man bei vielen Fragen erst ein Diagramm, einen Datenauszug oder einen längeren Text lesen muss, um dann die richtigen Statements zu finden. Hier helfen Lernkarten also nur bedingt - stattdessen üben, üben, üben. Durch den relativ niedrigen Pass-Score von 70% kann man es sich leisten, unsichere Fragen zuerst zu überspringen und erst nachdem alle sicheren beantwortet sind, zu überdenken. Die Prüfung ist auf jeden Fall fair. Ich habe durch das Oracle-Zertifizierungsprogramm viel gelernt. Die Datenbanken unter meiner Aufsicht laufen deutlich performanter und liefern höhere Verfügbarkeit, weil ich Probleme eliminieren konnte, die mir vorher nicht klar waren. Eine klassische Misskonfiguration, volle Archive Logs, weil diese mit zu lange gehaltenem Flashback-Speicher kollidieren, konnte ich bereits in einer der ersten Stunden meines Kurses an der Uni Melbourne mit Hilfe meines Professors klären. Beide Prüfungen waren problemlos parallel zu anderen Prüfungen zu absolvieren. Empfehlen kann ich eine gründliche Online-Recherche aber auch die Oracle Press-Bücher, welche mit Prüfungsfragen am Ende jedes Kapitels aufwarten. So spart man sich Zeit und ist trotzdem gut vorbereitet. Auch wenn ich keine Laufbahn als Administrator einschlagen werde, bin ich froh die zugrundeliegende Technologie vieler Anwendungen besser zu verstehen. Für meine tägliche Arbeit als Anwendungsentwickler hat es mir vor allem geholfen, Oracle-Konzepte z.B. im Bereich der Transaktionssteuerung und Wiederherstellung zu verstehen und damit viele Open Source Produkte jetzt sinnvoller bewerten und empfehlen zu können." Eine Übersicht der Zertifizierungspfade finden Sie auf der Oracle University Webseite (dann einfach "Deutschland""auswählen und anschließend auf den Punkt "Zertifizierungen" klicken).

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• Big Data – Evolution of Big Data – Day 3 of 21

  - by Pinal Dave

  In yesterday’s blog post we answered what is the Big Data. Today we will understand why and how the evolution of Big Data has happened. Though the answer is very simple, I would like to tell it in the form of a history lesson. Data in Flat File In earlier days data was stored in the flat file and there was no structure in the flat file.  If any data has to be retrieved from the flat file it was a project by itself. There was no possibility of retrieving the data efficiently and data integrity has been just a term discussed without any modeling or structure around. Database residing in the flat file had more issues than we would like to discuss in today’s world. It was more like a nightmare when there was any data processing involved in the application. Though, applications developed at that time were also not that advanced the need of the data was always there and there was always need of proper data management. Edgar F Codd and 12 Rules Edgar Frank Codd was a British computer scientist who, while working for IBM, invented the relational model for database management, the theoretical basis for relational databases. He presented 12 rules for the Relational Database and suddenly the chaotic world of the database seems to see discipline in the rules. Relational Database was a promising land for all the unstructured database users. Relational Database brought into the relationship between data as well improved the performance of the data retrieval. Database world had immediately seen a major transformation and every single vendors and database users suddenly started to adopt the relational database models. Relational Database Management Systems Since Edgar F Codd proposed 12 rules for the RBDMS there were many different vendors who started them to build applications and tools to support the relationship between database. This was indeed a learning curve for many of the developer who had never worked before with the modeling of the database. However, as time passed by pretty much everybody accepted the relationship of the database and started to evolve product which performs its best with the boundaries of the RDBMS concepts. This was the best era for the databases and it gave the world extreme experts as well as some of the best products. The Entity Relationship model was also evolved at the same time. In software engineering, an Entity–relationship model (ER model) is a data model for describing a database in an abstract way. Enormous Data Growth Well, everything was going fine with the RDBMS in the database world. As there were no major challenges the adoption of the RDBMS applications and tools was pretty much universal. There was a race at times to make the developer’s life much easier with the RDBMS management tools. Due to the extreme popularity and easy to use system pretty much every data was stored in the RDBMS system. New age applications were built and social media took the world by the storm. Every organizations was feeling pressure to provide the best experience for their users based the data they had with them. While this was all going on at the same time data was growing pretty much every organization and application. Data Warehousing The enormous data growth now presented a big challenge for the organizations who wanted to build intelligent systems based on the data and provide near real time superior user experience to their customers. Various organizations immediately start building data warehousing solutions where the data was stored and processed. The trend of the business intelligence becomes the need of everyday. Data was received from the transaction system and overnight was processed to build intelligent reports from it. Though this is a great solution it has its own set of challenges. The relational database model and data warehousing concepts are all built with keeping traditional relational database modeling in the mind and it still has many challenges when unstructured data was present. Interesting Challenge Every organization had expertise to manage structured data but the world had already changed to unstructured data. There was intelligence in the videos, photos, SMS, text, social media messages and various other data sources. All of these needed to now bring to a single platform and build a uniform system which does what businesses need. The way we do business has also been changed. There was a time when user only got the features what technology supported, however, now users ask for the feature and technology is built to support the same. The need of the real time intelligence from the fast paced data flow is now becoming a necessity. Large amount (Volume) of difference (Variety) of high speed data (Velocity) is the properties of the data. The traditional database system has limits to resolve the challenges this new kind of the data presents. Hence the need of the Big Data Science. We need innovation in how we handle and manage data. We need creative ways to capture data and present to users. Big Data is Reality! Tomorrow In tomorrow’s blog post we will try to answer discuss Basics of Big Data Architecture. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Big Data, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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• Justifiable Perks.

  - by Phil Factor

      I was once the director of a start-up IT Company, and had the task of recruiting a proportion of the management team. As my background was in IT management, I was rather more familiar with recruiting Geeks for technology jobs, but here, one of my early tasks was interviewing a Marketing Director.  The small group of financiers had suggested a rather strange Irishman called  Halleran.  From my background in City of London dealing-rooms, I was slightly unprepared for the experience of interviewing anyone wearing a pink suit. Many of my older City colleagues would have required resuscitation after seeing his white leather shoes. However, nobody will accuse me of prejudging an interviewee. After all, many Linux experts who I’ve come to rely on have appeared for interview dressed as hobbits. In fact, the interview went well, and we had even settled his salary.  I was somewhat unprepared for the coda.    ‘And I will need to be provided with a Ferrari  by the company.’    ‘Hmm. That seems reasonable.’    Initially, he looked startled, and then a slow smile of victory spread across his face.    ‘What colour would you like?’ I asked genially.    ‘It has to be red.’ He looked very earnest on this point.    ‘Fine. I have to go past Hamleys on the way home this evening, so I’ll pick one up then for you.’    ‘Er.. Hamley’s is a toyshop, not a Ferrari Dealership.’    I stared at him in bafflement for a few seconds. ‘You’re not seriously asking for a real Ferrari are you?’     ‘Well, yes. Not for my own sake, you understand. I’d much prefer a simple run-about, but my position demands it. How could I maintain the necessary status in the office without one? How could I do my job in marketing when my grey Datsun was all too visible in the car Park? It is a tool of the job.’    ‘Excuse me a moment, but I must confer with the MD’    I popped out to see Chris, the MD. ‘Chris, I’m interviewing a lunatic in a pink suit who is trying to demand that a Ferrari is a precondition of his employment. I tried the ‘misunderstanding trick’ but it didn’t faze him.’     ‘Sorry, Phil, but we’ve got to hire him. The VCs insist on it. You’ve got to think of something that doesn’t involve committing to the purchase of a Ferrari. Current funding barely covers the rent for the building.’    ‘OK boss. Leave it to me.’    On return, I slapped O’Halleran’s file on the table with a genial, paternalistic smile. ‘Of course you should have a Ferrari. The only trouble is that it will require a justification document that can be presented to the board. I’m sure you’ll have no problem in preparing this document in the required format.’ The initial look of despair was quickly followed by a bland look of acquiescence. He had, earlier in the interview, argued with great eloquence his skill in preparing the tiresome documents that underpin the essential corporate and government deals that were vital to the success of this new enterprise. The justification of a Ferrari should be a doddle.     After the interview, Chris nervously asked how I’d fared.     ‘I think it is all solved.’    ‘… without promising a Ferrari, I hope.’    ‘Well, I did actually; on condition he justified it in writing.’    Chris issued a stream of invective. The strain of juggling the resources in an underfunded startup was beginning to show.    ‘Don’t worry. In the unlikely event of him coming back with the required document, I’ll give him mine.’    ‘Yours?’ He strode over to the window to stare down at the car park.    He needn’t have worried: I knew that his breed of marketing man could more easily lay an ostrich egg than to prepare a decent justification document. My Ferrari is still there at the back of my garage. Few know of the Ferrari cultivator, a simple inexpensive motorized device designed for the subsistence farmers of southern Italy. It is the very devil to start, but it creates a perfect tilth for the seedbed.

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• Stumbling Through: Making a case for the K2 Case Management Framework

  I have recently attended a three-day training session on K2s Case Management Framework (CMF), a free framework built on top of K2s blackpearl workflow product, and I have come away with several different impressions for some of the different aspects of the framework.  Before we get into the details, what is the Case Management Framework?  It is essentially a suite of tools that, when used together, solve many common workflow scenarios.  The tool has been developed over time by K2 consultants that have realized they tend to solve the same problems over and over for various clients, so they attempted to package all of those common solutions into one framework.  Most of these common problems involve workflow process that arent necessarily direct and would tend to be difficult to model.  Such solutions could be achieved in blackpearl alone, but the workflows would be complex and difficult to follow and maintain over time.  CMF attempts to simplify such scenarios not so much by black-boxing the workflow processes, but by providing different points of entry to the processes allowing them to be simpler, moving the complexity to a middle layer.  It is not a solution in and of itself, development is still required to tie the pieces together. CMF is under continuous development, both a plus and a minus in that bugs are fixed quickly and features added regularly, but it may be difficult to know which versions are the most stable.  CMF is not an officially supported K2 product, which means you will not get technical support but you will get access to the source code. The example given of a business process that would fit well into CMF is that of a file cabinet, where each folder in said file cabinet is a case that contains all of the data associated with one complaint/customer/incident/etc. and various users can access that case at any time and take one of a set of pre-determined actions on it.  When I was given that example, my first thought was that any workflow I have ever developed in the past could be made to fit this model there must be more than just this model to help decide if CMF is the right solution.  As the training went on, we learned that one of the key features of CMF is SharePoint integration as each case gets a SharePoint site created for it, and there are a number of excellent web parts that can be used to design a portal for users to get at all the information on their cases.  While CMF does not require SharePoint, without it you will be missing out on a huge portion of functionality that CMF offers.  My opinion is that without SharePoint integration, you may as well write your workflows and other components the old fashioned way. When I heard that each case gets its own SharePoint site created for it, warning bells immediately went off in my head as I felt that depending on the data load, a CMF enabled solution could quickly overwhelm SharePoint with thousands of sites so we have yet another deciding factor for CMF:  Just how many cases will your solution be creating?  While it is not necessary to use the site-per-case model, it is one of the more useful parts of the framework.  Without it, you are losing a big chunk of what CMF has to offer. When it comes to developing on top of the Case Management Framework, it becomes a matter of configuring what makes up a case, what can be done to a case, where each action on a case should take the user, and then typing up actions to case statuses.  This last step is one that I immediately warmed up to, as just about every workflow Ive designed in the past needed some sort of mapping table to set the status of a work item based on the action being taken definitely one of those common solutions that it is good to see rolled up into a re-useable entity (and it gets a nice configuration UI to boot!).  This concept is a little different than traditional workflow design, in that you dont have to think of an end-to-end process around passing a case along a path, rather, you must envision the case as central object with workflow threads branching off of it and doing their own thing with the case data.  Certainly there can be certain workflow threads that get rather complex, but the idea is that they RELATE to the case, they dont BECOME the case (though it is still possible with action->status mappings to prevent certain actions in certain cases, so it isnt always a wide-open free for all of actions on a case). I realize that this description of the Case Management Framework merely scratches the surface on what the product actually can do, and I dont think Ive conclusively defined for what sort of business scenario you can make a case for Case Management Framework.  What I do hope to have accomplished with this post is to raise awareness of CMF there is a (free!) product out there that could potentially simplify a tangled workflow process and give (for free!) a very useful set of SharePoint web parts and a nice set of (free!) reports.  The best way to see if it will truly fit your needs is to give it a try did I mention it is FREE?  Er, ok, so it is free, but only obtainable at this time for K2 partnersDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Walmart and Fusion Apps

  - by ultan o'broin

  Photograph: Misha Vaughan I attended Fusion Apps (yes, I know I am supposed to say "Oracle Fusion Applications", but stuffy old style guides are a turn-off in interwebs conversations) User Experience Advocate (FXA) training in Long Beach, California last week; a suitable location as ODTUG KSCOPE 11 was kicking off and key players were in the area. As a member of Oracle's Apps-UX team I know the Fusion Apps messaging, natch, and done some other Fusion Apps go-to-market content work too. For the messaging details themselves, see Lonneke Dikmans (@lonnekedikmans) great blog, by the way. However, I wanted some 'formal' training combined with the opportunity to meet and learn from people already out there delivering those messages. The idea in me reaching out to Misha Vaughan, Apps-UX FXA maven, to get me onto this training was that in addition to my UX knowledge, I could leverage my location in EMEA and hit up customer events more quickly and easily. Those local user groups do like to hear the voice of locals too you know (so I need to work on that mid-Atlantic accent). I'm looking forward to such opportunities. The training was all smashing stuff, just the right level of detail, delivered professionally and with great style and humor. I was especially honored to be paired off for my er, coaching with Debra Lilley (@debralilley), who shared with everyone all kinds of tips and insights from her experiences of delivering the message and demo. For me, that was the real power of the FXA event--the communal, conversational aspect--the meeting up with people who had done all this for real, the sharing in their experiences, while learning along with other newbies. Sorry, but that all-important social aspect doesn't work so well with remote meetings. Katie Candland (Apps-UX) gave us a great tour of the Fusion Apps demo and included some useful presentational tips too (any excuse to buy that iPad). It's clear to me that the Fusion Apps messaging and demos really come alive with real-world examples that local application users will recognize, and I picked up some "yes, that's my job made easier" scene-stealers from Debra and Karen Brownfield too, to add to the great ones already provided. This power of examples shouldn't surprise anyone, they've long been a mainstay of applications user assistance, popular with users. We'll offer customers different types of example topics in the Fusion Apps online help too (stay tuned), and we know from research how important those 3S's (stories, scenarios, and simulations) are to users when they consume and apply information. Well, we've got the simulation, now it's time for more stories and scenarios. If you get a chance to participate in an FXA event (whether you are an Oracle employee or otherwise), I'd encourage it. It's committing your time and energy for sure, but I got real bang for the buck from it for my everyday job too. Listening to the room's feedback on the application demo really brought our internal design work to life, and I picked up on some things that I need to follow up on (like how you alphabetically sort stuff in other languages). User experience is after all, about users. What will I be doing next, and what would I like to see happen? Obviously, I need to develop my story-telling links with the people I met in Long Beach and do some practicing with the materials, and then get out there and deliver them at a suitable location. The demo is what it is right now, and that's a super-rich demo that I know everyone will want to see and ask questions about. Then, as mentioned by attendees at the FXA event, follow up on those translated and localized messages for EMEA (and APAC), that deal with different statutory or reporting requirements of the target markets. Given my background I would say that, wouldn't I? However, language is part of the UX, and international revenue is greater than US-only revenue for Oracle, so yes dear, we all need to get over the fact that enterprise apps users don't all speak, or want to speak, American-English. Most importantly perhaps, the continued development of a strong messaging community between Oracle and partners and customers where we can swap and share those FXA messaging stories and scenarios about Fusion Apps in a conversational way. The more the better, a combination of online and face-to-face meetings. I must also mention the great dinner after the event at Parker's Lighthouse, and the fun myself and Andrew Gilmour (Apps-UX) had at our end of the table talking about just about everything except Fusion Apps with Ronald Van Luttikhuizen and Ben Prusinski (who now understands the difference between Cork and Dublin people. I hope). Thanks to all the Apps-UXers who helped bring the FXA training to town, and to Debra and all the others that I am too jetlagged to mention right who were instrumental in making it happen for me. Here's to the next one. And the Walmart angle? That was me doing my Robert Scoble (ScO'bilizer?)-style guerilla smart phone research in Walmart in Long Beach, before the FXA event. It's all about stories for me. You can read more about it on the appslab blog (see the comments).

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• Performance triage

  - by Dave

  Folks often ask me how to approach a suspected performance issue. My personal strategy is informed by the fact that I work on concurrency issues. (When you have a hammer everything looks like a nail, but I'll try to keep this general). A good starting point is to ask yourself if the observed performance matches your expectations. Expectations might be derived from known system performance limits, prototypes, and other software or environments that are comparable to your particular system-under-test. Some simple comparisons and microbenchmarks can be useful at this stage. It's also useful to write some very simple programs to validate some of the reported or expected system limits. Can that disk controller really tolerate and sustain 500 reads per second? To reduce the number of confounding factors it's better to try to answer that question with a very simple targeted program. And finally, nothing beats having familiarity with the technologies that underlying your particular layer. On the topic of confounding factors, as our technology stacks become deeper and less transparent, we often find our own technology working against us in some unexpected way to choke performance rather than simply running into some fundamental system limit. A good example is the warm-up time needed by just-in-time compilers in Java Virtual Machines. I won't delve too far into that particular hole except to say that it's rare to find good benchmarks and methodology for java code. Another example is power management on x86. Power management is great, but it can take a while for the CPUs to throttle up from low(er) frequencies to full throttle. And while I love "turbo" mode, it makes benchmarking applications with multiple threads a chore as you have to remember to turn it off and then back on otherwise short single-threaded runs may look abnormally fast compared to runs with higher thread counts. In general for performance characterization I disable turbo mode and fix the power governor at "performance" state. Another source of complexity is the scheduler, which I've discussed in prior blog entries. Lets say I have a running application and I want to better understand its behavior and performance. We'll presume it's warmed up, is under load, and is an execution mode representative of what we think the norm would be. It should be in steady-state, if a steady-state mode even exists. On Solaris the very first thing I'll do is take a set of "pstack" samples. Pstack briefly stops the process and walks each of the stacks, reporting symbolic information (if available) for each frame. For Java, pstack has been augmented to understand java frames, and even report inlining. A few pstack samples can provide powerful insight into what's actually going on inside the program. You'll be able to see calling patterns, which threads are blocked on what system calls or synchronization constructs, memory allocation, etc. If your code is CPU-bound then you'll get a good sense where the cycles are being spent. (I should caution that normal C/C++ inlining can diffuse an otherwise "hot" method into other methods. This is a rare instance where pstack sampling might not immediately point to the key problem). At this point you'll need to reconcile what you're seeing with pstack and your mental model of what you think the program should be doing. They're often rather different. And generally if there's a key performance issue, you'll spot it with a moderate number of samples. I'll also use OS-level observability tools to lock for the existence of bottlenecks where threads contend for locks; other situations where threads are blocked; and the distribution of threads over the system. On Solaris some good tools are mpstat and too a lesser degree, vmstat. Try running "mpstat -a 5" in one window while the application program runs concurrently. One key measure is the voluntary context switch rate "vctx" or "csw" which reflects threads descheduling themselves. It's also good to look at the user; system; and idle CPU percentages. This can give a broad but useful understanding if your threads are mostly parked or mostly running. For instance if your program makes heavy use of malloc/free, then it might be the case you're contending on the central malloc lock in the default allocator. In that case you'd see malloc calling lock in the stack traces, observe a high csw/vctx rate as threads block for the malloc lock, and your "usr" time would be less than expected. Solaris dtrace is a wonderful and invaluable performance tool as well, but in a sense you have to frame and articulate a meaningful and specific question to get a useful answer, so I tend not to use it for first-order screening of problems. It's also most effective for OS and software-level performance issues as opposed to HW-level issues. For that reason I recommend mpstat & pstack as my the 1st step in performance triage. If some other OS-level issue is evident then it's good to switch to dtrace to drill more deeply into the problem. Only after I've ruled out OS-level issues do I switch to using hardware performance counters to look for architectural impediments.

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• Exiting a reboot loop

  - by user12617035

  If you're in a situation where the system is panic'ing during boot, you can use # boot net -s to regain control of your system. In my case, I'd added some diagnostic code to a (PCI) driver (that is used to boot the root filesystem). There was a bug in the driver, and each time during boot, the bug occurred, and so caused the system to panic: ... 000000000180b950 genunix:vfs_mountroot+60 (800, 200, 0, 185d400, 1883000, 18aec00) %l0-3: 0000000000001770 0000000000000640 0000000001814000 00000000000008fc %l4-7: 0000000001833c00 00000000018b1000 0000000000000600 0000000000000200 000000000180ba10 genunix:main+98 (18141a0, 1013800, 18362c0, 18ab800, 180e000, 1814000) %l0-3: 0000000070002000 0000000000000001 000000000180c000 000000000180e000 %l4-7: 0000000000000001 0000000001074800 0000000000000060 0000000000000000 skipping system dump - no dump device configured rebooting... If you're logged in via the console, you can send a BREAK sequence in order to gain control of the firmware's (OBP's) prompt. Enter Ctrl-Shift-[ in order to get the TELNET prompt. Once telnet has control, enter this: telnet> send brk You'll be presented with OBP's prompt: ok You then enter the following in order to boot into single-user mode via the network: ok boot net -s Note that booting from the network under Solaris will implicitly cause the system to be INSTALLED with whatever software had last been configured to be installed. However, we are using boot net -s as a "handle" with which to get at the Solaris prompt. Once at that prompt, we can perform actions as root that will let us back out our buggy driver (ok... MY buggy driver :-)) ...and replace it with the original, non-buggy driver. Entering the boot command caused the following output, as well as left us at the Solaris prompt (in single-user-mode): Sun Blade 1500, No Keyboard Copyright 1998-2004 Sun Microsystems, Inc. All rights reserved. OpenBoot 4.16.4, 1024 MB memory installed, Serial #53463393. Ethernet address 0:3:ba:2f:c9:61, Host ID: 832fc961. Rebooting with command: boot net -s Boot device: /pci@1f,700000/network@2 File and args: -s 1000 Mbps FDX Link up Timeout waiting for ARP/RARP packet Timeout waiting for ARP/RARP packet 4000 1000 Mbps FDX Link up Requesting Internet address for 0:3:ba:2f:c9:61 SunOS Release 5.10 Version Generic_118833-17 64-bit Copyright 1983-2005 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Booting to milestone "milestone/single-user:default". Configuring devices. Using RPC Bootparams for network configuration information. Attempting to configure interface bge0... Configured interface bge0 Requesting System Maintenance Mode SINGLE USER MODE # Our goal is to now move to the directory containing the buggy driver and replace it with the original driver (that we had saved away before ever loading our buggy driver! :-) However, since we booted from the network, the root filesystem ("/") is NOT mounted on one of our local disks. It is mounted on an NFS filesystem exported by our install server. To verify this, enter the following command: # mount | head -1 / on my-server:/export/install/media/s10u2/solarisdvd.s10s_u2dvd/latest/Solaris_10/Tools/Boot remote/read/write/setuid/devices/dev=4ac0001 on Wed Dec 31 16:00:00 1969 As a result, we have to create a temporary mount point and then mount the local disk onto that mount point: # mkdir /tmp/mnt # mount /dev/dsk/c0t0d0s0 /tmp/mnt Note that your system will not necessarily have had its root filesystem on "c0t0d0s0". This is something that you should also have recorded before you ever loaded your.. er... "my" buggy driver! :-) One can find the local disk mounted under the root filesystem by entering: # df -k / Filesystem kbytes used avail capacity Mounted on /dev/dsk/c0t0d0s0 76703839 4035535 71901266 6% / To continue with our example, we can now move to the directory of buggy-driver in order to replace it with the original driver. Note that /tmp/mnt is prefixed to the path of where we'd "normally" find the driver: # cd /tmp/mnt/platform/sun4u/kernel/drv/sparcv9 # ls -l pci\* -rw-r--r-- 1 root root 288504 Dec 6 15:38 pcisch -rw-r--r-- 1 root root 288504 Dec 6 15:38 pcisch.aar -rwxr-xr-x 1 root sys 211616 Jun 8 2006 pcisch.orig # cp -p pcisch.orig pcisch We can now synchronize any in-memory filesystem data structures with those on disk... and then reboot. The system will then boot correctly... as expected: # sync;sync # reboot syncing file systems... done Sun Blade 1500, No Keyboard Copyright 1998-2004 Sun Microsystems, Inc. All rights reserved. OpenBoot 4.16.4, 1024 MB memory installed, Serial #xxxxxxxx. Ethernet address 0:3:ba:2f:c9:61, Host ID: yyyyyyyy. Rebooting with command: boot Boot device: /pci@1e,600000/ide@d/disk@0,0:a File and args: SunOS Release 5.10 Version Generic_118833-17 64-bit Copyright 1983-2005 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Hostname: my-host NIS domain name is my-campus.Central.Sun.COM my-host console login: ...so that's how it's done! Of course, the easier way is to never write a buggy-driver... but.. then.. we all "have an eraser on the end of each of our pencils"... don't we ? :-) "...thank you... and good night..."

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• IE6 and fieldset background color?

  - by codemonkey613

  Hey, I'm having some difficulty with CSS and IE6 compatibility. URL: http://bit.ly/dlX7cS Problem #1: I put a background image on the fieldset around Canada and United States. In IE6 and IE7, the background bleeds above the border-top of the fieldset. So, I found a fix. It is applied only to IE browsers, and moves the legend up a few pixels, aligning the background correctly. <!-- Fix: IE6/IE7, Legends --> <!--[if lte IE 7]> <style type="text/css"> fieldset { position: relative; } fieldset legend { position: absolute; top: -0.5em; left: 0; } </style> <![endif]--> This fixes IE7. But in IE6, it seems to make my legend for Canada vanish completely. Does anyone have a copy of IE6 they can open my site and tell me if you see Canada label. (I am testing with a multi-IE program, and it keeps crashing. My copy might not be accurate). If it's not there, any suggestions on how to fix it? Also, any suggestion on where I can download working copy of IE6? Problem #2: I have a Google Map embedded using iframe. The width of that iframe is 515px. In Firefox, Chrome, IE7 -- that is the correct alignment. But in IE6, it gets <br/> underneath the Just Energy paragraph beside it. It doesn't fit. I have to change width to 513px for it to fit. Uhm, anyone know where those 2px of difference happen? I removed border, padding, margin from the iframe, but still something is happening. <!-- Google Maps --> <iframe class="gmap" src="http://maps.google.com/maps/ms?hl=en&amp;ie=UTF8&amp;msa=0&amp;msid=100146512697135839835.000481e2a2779e8865863&amp;ll=42,-100&amp;spn=20,80&amp;output=embed" frameborder="0" marginheight="0" marginwidth="0" scrolling="no"></iframe> <!-- / Google Maps --> Er, big headache. lol

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• Problem with jQuery selector and MasterPage

  - by Daemon

  Hi, I have a problem with a master page containing a asp:textbox that I'm trying to access using jQuery. I have read lot sof thread regarding this and tried all the different approaches I have seen, but regardless, the end result end up as Undefined. This is the relevant part of the MasterPage code: <p><asp:Label ID="Label1" AssociatedControlID="osxinputfrom" runat="server">Navn</asp:Label><asp:TextBox CssClass="osxinputform" ID="osxinputfrom" runat="server"></asp:TextBox></p> When I click the button, the following code from a jQuery .js file is run: show: function(d) { $('#osx-modal-content .osxsubmitbutton').click(function (e) { e.preventDefault(); if (OSX.validate()){ $('#osx-modal-data').fadeOut(200); d.container.animate( {height:80}, 500, function () { $('#osx-modal-data').html("<h2>Sender...</h2>").fadeIn(250, function () { $.ajax({ type: "POST", url: "Default.aspx/GetDate", data: "{'from':'" + $("#osxinputfrom").val() + "','mailaddress':'" + $("#osxinputmail").val() + "','header':'Test3','message':'Test4'}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(msg) { $('#osx-modal-data').fadeOut(200, function () { $('#osx-modal-data').html('<h2>Meldingen er sendt!</h2>'); $('#osx-modal-data').fadeIn(200); }); }, error: function(msg){ $('#osx-modal-data').fadeOut(200, function () { $('#osx-modal-data').html('<h2>Feil oppstod ved sending av melding!</h2>'); $('#osx-modal-data').fadeIn(200); }); } }); }); } ); } else{ $('#osxinputstatus').fadeOut(250, function () { $('#osxinputstatus').html('<p id="osxinputstatus">' + OSX.message + '</a>'); $('#osxinputstatus').fadeIn(250); }); } }); }, So the problem here is that $("#osxinputfrom").val() evaluated to Undefined. I understand that the masterpage will add some prefix to the ID, so I tried using the ID from the page when it's run that ends up as ct100_osxinputfrom, and I also tried some other hinds that I found while searching like $("#<%=osxinputfrom.ClientID%"), but it ends up as Undefined in the method that is called from the jQuery ajax method anyway. The third and fourth parameters to the ajay function that is hardcoded as Test3 and Test4 comes fine in the C# backend method. So my question is simply: How can I rewrite the jQuery selector to fetch the correct value from the textbox? (before I used master pages it worked fine by the way) Best regards Daemon

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• Looking for efficient scaling patterns for Silverlight application with distributed text-file data s

  - by Edward Tanguay

  I'm designing a Silverlight software solution for students and teachers to record flashcards, e.g. words and phrases that students find while reading and errors that teachers notice while teaching. Requirements are: each person publishes his own flashcards in a file on a web server, e.g. http://:www.mywebserver.com/flashcards.txt other people subscribe to that person's flashcards by using a Silverlight flashcard reader that I have developed and entering the URLs of flashcard files they want to subscribe to, URLs and imported flashcards being saved in IsolatedStorage the flashcards.txt file has the following simple format: title, then blocks of question/answers: Jim Smith's flashcards from English class 53-222, winter semester 2009 ==fla Das kann nicht sein. That can't be. ==fla Es sei denn, er kommt nicht. Unless he doesn't come. The user then makes public the URL to his flashcard file and other readers begin reading in his flashcards. In order to lower the bar for non-technical users to contribute, it will even be possible for them to save this text in a Google Document, which they publish and distribute the URL. The flashcard readers will then recognize it is a google document and perform the necessary screen scraping to get at the raw text. I have two technical questions about this approach: What is a best way to plan now for scalability issues: e.g. if your reader is subscribed to 10 flashcard files that are each 200K, it will have to download 2MB of text just to find out if any new flashcards are available. Or can I somehow accurately and consistently get at the last update date/time of text files on servers and published google docs? Each reader will have the ability to allow the person to test himself on imported flashcards and add meta information to them, e.g. categorize them, edit them, etc. This information will be stored in IsolatedStorage along with the important flashcards themselves. What is a good pattern to allow these readers to share and synchronize this meta data, e.g. so when you are looking at a flashcard you can see that 5 other people have made corrections to it. The best solution I can think of now is that the Silverlight readers will have to republish their data to a central database, but then there is the problem of uniquely identifying each flashcard, the best approach seems to be URL + position-in-file, or even better URL + original text of both question and answer fields, but both of these have their obvious drawbacks. The main requirement is that the bar for participation is kept as low as possible, i.e. type text in a google document, publish it, distribute the URL, and you're publishing within the flashcard community. So I want to come up with the most efficient technical solutions in order to compensate for the lack of database, lack of unique ids, etc. For those who have designed or developed similar non-traditional, distributed database projects like this, what advice, experience or best-practice tips you can share on the above two points?

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• compiling numpy with sunperf atlas libraries

  - by user288558

  I would like to use the sunperf libraries when compiling scipy and numpy. I tried using setupscons.py which seems to check from SUNPERF libraries, but it didnt recognize where mine are: here is a listing of /pkg/linux/SS12/sunstudio12.1 (thats where the sunperf library lives): wkerzend@mosura:/home/wkerzend>ls /pkg/linux/SS12/sunstudio12.1/lib/ CCios/ libdbx_agent.so@ libsunperf.so.3@ amd64/ libfcollector.so@ libtha.so@ collector.jar@ libfsu.so@ libtha.so.1@ dbxrc@ libfsu.so.1@ locale/ debugging.so@ libfui.so@ make.rules@ er.rc@ libfui.so.1@ rw7/ libblacs_openmpi.so@ librtc.so@ sse2/ libblacs_openmpi.so.1@ libscalapack.so@ stlport4/ libcollectorAPI.so@ libscalapack.so.1@ svr4.make.rules@ libcollectorAPI.so.1@ libsunperf.so@ tools_svc_mgr@ I tried to specify this directory in sites.cfg, but I still get the following errors: Checking if g77 needs dummy main - MAIN__. Checking g77 name mangling - '_', '', lower-case. Checking g77 C compatibility runtime ...-L/usr/lib/gcc/x86_64-redhat-linux/3.4.6 - L/usr/lib/gcc/x86_64-redhat-linux/3.4.6 -L/usr/lib/gcc/x86_64-redhat- linux/3.4.6/../../../../lib64 -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../.. -L/lib/../lib64 -L/usr/lib/../lib64 -lfrtbegin -lg2c -lm Checking MKL ... Failed (could not check header(s) : check config.log in build/scons/scipy/integrate for more details) Checking ATLAS ... Failed (could not check header(s) : check config.log in build/scons/scipy/integrate for more details) Checking SUNPERF ... Failed (could not check symbol cblas_sgemm : check config.log in build/scons/scipy/integrate for more details)) Checking Generic BLAS ... yes Checking for BLAS (Generic BLAS) ... Failed: BLAS (Generic BLAS) test could not be linked and run Exception: Could not find F77 BLAS, needed for integrate package: File "/priv/manana1/wkerzend/install_dir/scipy-0.7.1/scipy/integrate/SConstruct", line 2: GetInitEnvironment(ARGUMENTS).DistutilsSConscript('SConscript') File "/home/wkerzend/python_coala/numscons-0.10.1-py2.6.egg/numscons/core/numpyenv.py", line 108: build_dir = '$build_dir', src_dir = '$src_dir') File "/priv/manana1/wkerzend/python_coala/numscons-0.10.1-py2.6.egg/numscons/scons-local/scons-local-1.2.0/SCons/Script/SConscript.py", line 549: return apply(_SConscript, [self.fs,] + files, subst_kw) File "/priv/manana1/wkerzend/python_coala/numscons-0.10.1-py2.6.egg/numscons/scons-local/scons-local-1.2.0/SCons/Script/SConscript.py", line 259: exec _file_ in call_stack[-1].globals File "/priv/manana1/wkerzend/install_dir/scipy-0.7.1/build/scons/scipy/integrate/SConscript", line 15: raise Exception("Could not find F77 BLAS, needed for integrate package") error: Error while executing scons command. See above for more information. If you think it is a problem in numscons, you can also try executing the scons command with --log-level option for more detailed output of what numscons is doing, for example --log-level=0; the lowest the level is, the more detailed the output it.----- any help is appreciated Wolfgang

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• Thread not behaving correctly

  - by ivor

  Hello, I wonder if anyone can help me to understand where I could be going wrong with this code; Basically I'm working on a turorial and calling the class below from another class - and it is getting the following error; Exception in thread "Thread-1" java.lang.NullPointerException at org.newdawn.spaceinvaders.TCPChat.run(TCPChat.java:322) at java.lang.Thread.run(Unknown Source) I realise the error is beibg flagged in another class- but I have tested the other class with a small class which sets up a separate thread - and it works fine, but as soon as I try and implement a new thread in this class - it causes all sorts of problems. Am I setting up the thread correctly in this class? Basically I can set up a thread in this class, with a test loop and it's fine, but when I bring in the functionality of the rest of the game it sometimes hangs, or does not display at all. Any suggestions on where I could be going wrong would be greatly appreciated. Thanks for looking. package org.newdawn.spaceinvaders; import java.awt.BorderLayout; import java.awt.Canvas; import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Graphics2D; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.awt.image.BufferStrategy; import java.util.ArrayList; import java.util.Scanner; import java.awt.*;//maybe not needed import javax.swing.*;//maybenot needed import java.util.Random; //import java.io.*; /** * The main hook of our game. This class with both act as a manager * for the display and central mediator for the game logic. * * Display management will consist of a loop that cycles round all * entities in the game asking them to move and then drawing them * in the appropriate place. With the help of an inner class it * will also allow the player to control the main ship. * * As a mediator it will be informed when entities within our game * detect events (e.g. alient killed, played died) and will take * appropriate game actions. * * @author Kevin Glass */ public class Game extends Canvas implements Runnable{ /** The stragey that allows us to use accelerate page flipping */ private BufferStrategy strategy; /** True if the game is currently "running", i.e. the game loop is looping */ private boolean gameRunning = true; /** The list of all the entities that exist in our game */ private ArrayList entities = new ArrayList(); /** The list of entities that need to be removed from the game this loop */ private ArrayList removeList = new ArrayList(); /** The entity representing the player */ private Entity ship; /** The speed at which the player's ship should move (pixels/sec) */ private double moveSpeed = 300; /** The time at which last fired a shot */ private long lastFire = 0; /** The interval between our players shot (ms) */ private long firingInterval = 500; /** The number of aliens left on the screen */ private int alienCount; /** The number of levels progressed */ private double levelCount; /** high score for the user */ private int highScore; /** high score for the user */ private String player = "bob"; //private GetUserInput getPlayer; /** The list of entities that need to be removed from the game this loop */ /** The message to display which waiting for a key press */ private String message = ""; /** True if we're holding up game play until a key has been pressed */ private boolean waitingForKeyPress = true; /** True if the left cursor key is currently pressed */ private boolean leftPressed = false; /** True if the right cursor key is currently pressed */ private boolean rightPressed = false; /** True if we are firing */ private boolean firePressed = false; /** True if game logic needs to be applied this loop, normally as a result of a game event */ private boolean logicRequiredThisLoop = false; //private Thread cThread = new Thread(this); //public Thread t = new Thread(this); //private Thread g = new Thread(this); void setHighscore(int setHS) { highScore = setHS; } public int getHighscore() { return highScore; } public void setPlayer(String setPlayer) { player = setPlayer; } public String getPlayer() { return player; } public void run() { //setup(); System.out.println("hello im running bob"); /*int count = 1; do { System.out.println("Count is: " + count); count++; try{Thread.sleep(1);} catch(InterruptedException e){} } while (count <= 2000000);*/ //Game g =new Game(); //Game g = this; // Start the main game loop, note: this method will not // return until the game has finished running. Hence we are // using the actual main thread to run the game. //setup(); //this.gameLoop(); //try{thread.sleep(1);} //catch{InterruptedException e} } /** * Construct our game and set it running. */ public Game () { //Thread t = new Thread(this);//set up new thread for invaders game //t.run();//run the run method of the game //Game g =new Game(); //setup(); //Thread t = new Thread(this); //thread.start(); //SwingUtilities.invokeLater(this); Thread er = new Thread(this); er.start(); } public void setup(){ //initialise highscore setHighscore(0); // create a frame to contain our game JFrame container = new JFrame("Space Invaders 101"); // get hold the content of the frame and set up the resolution of the game JPanel panel = (JPanel) container.getContentPane(); panel.setPreferredSize(new Dimension(800,600)); //panel.setLayout(null); // setup our canvas size and put it into the content of the frame setBounds(0,0,800,600); panel.add(this); // Tell AWT not to bother repainting our canvas since we're // going to do that our self in accelerated mode setIgnoreRepaint(true); // finally make the window visible container.pack(); container.setResizable(false); container.setVisible(true); // add a listener to respond to the user closing the window. If they // do we'd like to exit the game container.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { //cThread.interrupt(); System.exit(0); } }); // add a key input system (defined below) to our canvas // so we can respond to key pressed addKeyListener(new KeyInputHandler()); // request the focus so key events come to us requestFocus(); // create the buffering strategy which will allow AWT // to manage our accelerated graphics createBufferStrategy(2); strategy = getBufferStrategy(); // initialise the entities in our game so there's something // to see at startup initEntities(); } /** * Start a fresh game, this should clear out any old data and * create a new set. */ private void startGame() { // clear out any existing entities and intialise a new set entities.clear(); initEntities(); //initialise highscore setHighscore(0); // blank out any keyboard settings we might currently have leftPressed = false; rightPressed = false; firePressed = false; } /** * Initialise the starting state of the entities (ship and aliens). Each * entitiy will be added to the overall list of entities in the game. */ //private void initEntities() { public void initEntities() { Random randomAlien = new Random(); // create the player ship and place it roughly in the center of the screen //ship = new ShipEntity(this,"sprites/ship.gif",370,550);//orignal ship = new ShipEntity(this,"sprites/ship.gif",700,300);//changed postioning to right hand side entities.add(ship); // create a block of aliens (5 rows, by 12 aliens, spaced evenly) alienCount = 0; levelCount = 1.02; for (int row=0;row<7;row++) {//altered number of rows for (int x=0;x<5;x++) { int r = randomAlien.nextInt(100);//loop added to produce random aliens if (r < 50){ //Entity alien = new AlienEntity(this,"sprites/alien.gif",/*100+*/(x*50),(50)+row*30); Entity alien = new AlienEntity(this,"sprites/alien.gif",100+(x*90),(12)+row*85); entities.add(alien); alienCount++; } } } } //private void initEntities() { public void initAlienEntities() { Random randomAlien = new Random(); // create the player ship and place it roughly in the center of the screen //ship = new ShipEntity(this,"sprites/ship.gif",370,550);//orignal //ship = new ShipEntity(this,"sprites/ship.gif",700,300);//changed postioning to right hand side //entities.add(ship); // create a block of aliens (5 rows, by 12 aliens, spaced evenly) alienCount = 0; levelCount = levelCount + 0.10;//this increases the speed on every level for (int row=0;row<7;row++) {//altered number of rows for (int x=0;x<5;x++) { int r = randomAlien.nextInt(100);//loop added to produce random aliens if (r < 50){//randome check to show alien //Entity alien = new AlienEntity(this,"sprites/alien.gif",/*100+*/(x*50),(50)+row*30); Entity alien = new AlienEntity(this,"sprites/alien.gif",-250+(x*90),(12)+row*85); entities.add(alien); alienCount++; } } } advanceAlienSpeed(levelCount); } /** * Notification from a game entity that the logic of the game * should be run at the next opportunity (normally as a result of some * game event) */ public void updateLogic() { logicRequiredThisLoop = true; } /** * Remove an entity from the game. The entity removed will * no longer move or be drawn. * * @param entity The entity that should be removed */ public void removeEntity(Entity entity) { removeList.add(entity); } /** * Notification that the player has died. */ public void notifyDeath() { message = "Oh no! They got you, try again?"; waitingForKeyPress = true; } /** * Notification that the player has won since all the aliens * are dead. */ public void notifyWin() { message = "Well done! You Win!"; waitingForKeyPress = true; } /** * Notification that an alien has been killed */ public void notifyAlienKilled() { // reduce the alient count, if there are none left, the player has won! alienCount--; if (alienCount == 0) { //notifyWin();win not relevant here... this.initAlienEntities();//call fresh batch of aliens } // if there are still some aliens left then they all need to get faster, so // speed up all the existing aliens advanceAlienSpeed(1.30); } public void advanceAlienSpeed(double speed) { // if there are still some aliens left then they all need to get faster, so // speed up all the existing aliens for (int i=0;i<entities.size();i++) { Entity entity = (Entity) entities.get(i); if (entity instanceof AlienEntity) { // speed up by 2% entity.setHorizontalMovement(entity.getHorizontalMovement() * speed); //entity.setVerticalMovement(entity.getVerticalMovement() * 1.02); } } } /** * Attempt to fire a shot from the player. Its called "try" * since we must first check that the player can fire at this * point, i.e. has he/she waited long enough between shots */ public void tryToFire() { // check that we have waiting long enough to fire if (System.currentTimeMillis() - lastFire < firingInterval) { return; } // if we waited long enough, create the shot entity, and record the time. lastFire = System.currentTimeMillis(); ShotEntity shot = new ShotEntity(this,"sprites/shot.gif",ship.getX()+10,ship.getY()-30); entities.add(shot); } /** * The main game loop. This loop is running during all game * play as is responsible for the following activities: * <p> * - Working out the speed of the game loop to update moves * - Moving the game entities * - Drawing the screen contents (entities, text) * - Updating game events * - Checking Input * <p> */ public void gameLoop() { long lastLoopTime = System.currentTimeMillis(); // keep looping round til the game ends while (gameRunning) { // work out how long its been since the last update, this // will be used to calculate how far the entities should // move this loop long delta = System.currentTimeMillis() - lastLoopTime; lastLoopTime = System.currentTimeMillis(); // Get hold of a graphics context for the accelerated // surface and blank it out Graphics2D g = (Graphics2D) strategy.getDrawGraphics(); g.setColor(Color.black); g.fillRect(0,0,800,600); // cycle round asking each entity to move itself if (!waitingForKeyPress) { for (int i=0;i<entities.size();i++) { Entity entity = (Entity) entities.get(i); entity.move(delta); } } // cycle round drawing all the entities we have in the game for (int i=0;i<entities.size();i++) { Entity entity = (Entity) entities.get(i); entity.draw(g); } // brute force collisions, compare every entity against // every other entity. If any of them collide notify // both entities that the collision has occured for (int p=0;p<entities.size();p++) { for (int s=p+1;s<entities.size();s++) { Entity me = (Entity) entities.get(p); Entity him = (Entity) entities.get(s); if (me.collidesWith(him)) { me.collidedWith(him); him.collidedWith(me); } } } // remove any entity that has been marked for clear up entities.removeAll(removeList); removeList.clear(); // if a game event has indicated that game logic should // be resolved, cycle round every entity requesting that // their personal logic should be considered. if (logicRequiredThisLoop) { //g.drawString("Press any key",(800-g.getFontMetrics().stringWidth("Press any key"))/2,300); for (int i=0;i<entities.size();i++) { Entity entity = (Entity) entities.get(i); entity.doLogic(); } logicRequiredThisLoop = false; } // if we're waiting for an "any key" press then draw the // current message //show highscore at top of screen //show name at top of screen g.setColor(Color.white); g.drawString("Player : "+getPlayer()+" : Score : "+getHighscore(),20,20); if (waitingForKeyPress) { g.setColor(Color.white); g.drawString(message,(800-g.getFontMetrics().stringWidth(message))/2,250); g.drawString("Press any key",(800-g.getFontMetrics().stringWidth("Press any key"))/2,300); } // finally, we've completed drawing so clear up the graphics // and flip the buffer over g.dispose(); strategy.show(); // resolve the movement of the ship. First assume the ship // isn't moving. If either cursor key is pressed then // update the movement appropraitely ship.setVerticalMovement(0);//set to vertical movement if ((leftPressed) && (!rightPressed)) { ship.setVerticalMovement(-moveSpeed);//**took out setHorizaontalMOvement } else if ((rightPressed) && (!leftPressed)) { ship.setVerticalMovement(moveSpeed);//**took out setHorizaontalMOvement } // if we're pressing fire, attempt to fire if (firePressed) { tryToFire(); } // finally pause for a bit. Note: this should run us at about // 100 fps but on windows this might vary each loop due to // a bad implementation of timer try { Thread.sleep(10); } catch (Exception e) {} } } /** * A class to handle keyboard input from the user. The class * handles both dynamic input during game play, i.e. left/right * and shoot, and more static type input (i.e. press any key to * continue) * * This has been implemented as an inner class more through * habbit then anything else. Its perfectly normal to implement * this as seperate class if slight less convienient. * * @author Kevin Glass */ private class KeyInputHandler extends KeyAdapter { /** The number of key presses we've had while waiting for an "any key" press */ private int pressCount = 1; /** * Notification from AWT that a key has been pressed. Note that * a key being pressed is equal to being pushed down but *NOT* * released. Thats where keyTyped() comes in. * * @param e The details of the key that was pressed */ public void keyPressed(KeyEvent e) { // if we're waiting for an "any key" typed then we don't // want to do anything with just a "press" if (waitingForKeyPress) { return; } // if (e.getKeyCode() == KeyEvent.VK_LEFT) { ////leftPressed = true; ///} //// if (e.getKeyCode() == KeyEvent.VK_RIGHT) { //rightPressed = true; if (e.getKeyCode() == KeyEvent.VK_UP) { leftPressed = true; } if (e.getKeyCode() == KeyEvent.VK_DOWN) { rightPressed = true; } if (e.getKeyCode() == KeyEvent.VK_SPACE) { firePressed = true; } } /** * Notification from AWT that a key has been released. * * @param e The details of the key that was released */ public void keyReleased(KeyEvent e) { // if we're waiting for an "any key" typed then we don't // want to do anything with just a "released" if (waitingForKeyPress) { return; } if (e.getKeyCode() == KeyEvent.VK_UP) {//changed from VK_LEFT leftPressed = false; } if (e.getKeyCode() == KeyEvent.VK_DOWN) {//changed from VK_RIGHT rightPressed = false; } if (e.getKeyCode() == KeyEvent.VK_SPACE) { firePressed = false; } } /** * Notification from AWT that a key has been typed. Note that * typing a key means to both press and then release it. * * @param e The details of the key that was typed. */ public void keyTyped(KeyEvent e) { // if we're waiting for a "any key" type then // check if we've recieved any recently. We may // have had a keyType() event from the user releasing // the shoot or move keys, hence the use of the "pressCount" // counter. if (waitingForKeyPress) { if (pressCount == 1) { // since we've now recieved our key typed // event we can mark it as such and start // our new game waitingForKeyPress = false; startGame(); pressCount = 0; } else { pressCount++; } } // if we hit escape, then quit the game if (e.getKeyChar() == 27) { //cThread.interrupt(); System.exit(0); } } } /** * The entry point into the game. We'll simply create an * instance of class which will start the display and game * loop. * * @param argv The arguments that are passed into our game */ //public static void main(String argv[]) { //Game g =new Game(); // Start the main game loop, note: this method will not // return until the game has finished running. Hence we are // using the actual main thread to run the game. //g.gameLoop(); //} }

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• SNTP, why do you mock me?!

  - by Matthew

  --- SOLVED SEE EDIT 5 --- My w2k3 pdc is configured as an authoritative time server. Other servers on the domain are able to sync with it if I manually specify it in the peer list. By if I try to sync from flags 'domhier', it wont resync; I get the error message The computer did not resync because no time data was available. I can only think that it is not querying the pdc. I also tried setting the registry as shown here (http://support.microsoft.com/kb/193825). But no luck (I have not restarted the server, I am hoping I wont have to since it is the pdc) If you would like any further information on my config, please let me know. Edit 1: I have set the w32time service config AnnouceFlags to 0x05 as documented here www.krr.org/microsoft/authoritative_time_servers.php and a number of other places. The PDC syncs to an external time source (ntp). I can get the stripchart on the client from the pdc no problems. The loginserver for the host I am trying to configure is shown as the pdc. Edit 2: The packet capture has revealed something interesting. The client is contacting the correct server, and getting a valid response but I still get the same error message. Here is the NTP excerpt from the client to the server Flags: 11.. .... = Leap Indicator: alarm condition (clock not synchronized) (3) ..01 1... = Version number: NTP Version 3 (3) .... .011 = Mode: client (3) Peer Clock Stratum: unspecified or unavailable (0) Peer Polling Interval: 10 (1024 sec) Peer Clock Precision: 0.015625 sec Root Delay: 0.0000 sec Root Dispersion: 1.0156 sec Reference Clock ID: NULL Reference Clock Update Time: Sep 1, 2010 05:29:39.8170 UTC Originate Time Stamp: NULL Receive Time Stamp: NULL Transmit Time Stamp: Nov 8, 2010 01:44:44.1450 UTC Key ID: DC080000 Here is the reply NTP excerpt from the server to the client Flags: 0x1c 00.. .... = Leap Indicator: no warning (0) ..01 1... = Version number: NTP Version 3 (3) .... .100 = Mode: server (4) Peer Clock Stratum: secondary reference (3) Peer Polling Interval: 10 (1024 sec) Peer Clock Precision: 0.00001 sec Root Delay: 0.1484 sec Root Dispersion: 0.1060 sec Reference Clock ID: 192.189.54.17 Reference Clock Update Time: Nov 8,2010 01:18:04.6223 UTC Originate Time Stamp: Nov 8, 2010 01:44:44.1450 UTC Receive Time Stamp: Nov 8, 2010 01:46:44.1975 UTC Transmit Time Stamp: Nov 8, 2010 01:46:44.1975 UTC Key ID: 00000000 Edit 3: dumpreg for paramters on pdc Value Name Value Type Value Data ------------------------------------------------------------------------ ServiceMain REG_SZ SvchostEntry_W32Time ServiceDll REG_EXPAND_SZ C:\WINDOWS\system32\w32time.dll NtpServer REG_SZ bhvmmgt01.domain.com,0x1 Type REG_SZ AllSync and config Value Name Value Type Value Data -------------------------------------------------------------------------- LastClockRate REG_DWORD 156249 MinClockRate REG_DWORD 155860 MaxClockRate REG_DWORD 156640 FrequencyCorrectRate REG_DWORD 4 PollAdjustFactor REG_DWORD 5 LargePhaseOffset REG_DWORD 50000000 SpikeWatchPeriod REG_DWORD 900 HoldPeriod REG_DWORD 5 LocalClockDispersion REG_DWORD 10 EventLogFlags REG_DWORD 2 PhaseCorrectRate REG_DWORD 7 MinPollInterval REG_DWORD 6 MaxPollInterval REG_DWORD 10 UpdateInterval REG_DWORD 100 MaxNegPhaseCorrection REG_DWORD -1 MaxPosPhaseCorrection REG_DWORD -1 AnnounceFlags REG_DWORD 5 MaxAllowedPhaseOffset REG_DWORD 300 FileLogSize REG_DWORD 10000000 FileLogName REG_SZ C:\Windows\Temp\w32time.log FileLogEntries REG_SZ 0-300 Edit 4: Here are some notables from the ntp log file on the pdc. ReadConfig: failed. Use default one 'TimeJumpAuditOffset'=0x00007080 DomainHierachy: we are now the domain root. ClockDispln: we're a reliable time service with no time source: LS: 0, TN: 864000000000, WAIT: 86400000 Edit 5: F&^%ING SOLVED! Ok so I was reading about people with similar problems, some mentioned w32time server settings applied by GPO, but I tested this early on and there were no settings applied to this service by gpo. Others said that the reporting software may not be picking up some old gpo settings applied. So I searched the registry for all w32time instaces. I came across an interesting key that indicated there may be some other ntp software running on the server. Sure enough, I look through the installed software list and there the little F*&%ER is. Uninstalled and now working like a dream. FFFFFFFUUUUUUUUUUUU

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• Eine komplette Virtualisierungslandschaft auf dem eigenen Laptop – So geht’s

  - by Manuel Hossfeld

  Eine komplette Virtualisierungslandschaftauf dem eigenen Laptop – So geht’s Wenn man sich mit dem Virtualisierungsprodukt Oracle VM in der aktuellen Version 3.x näher befassen möchte, bietet es sich natürlich an, eine eigene Umgebung zu Lern- und Testzwecken zu installieren. Doch leichter gesagt als getan: Bei näherer Betrachtung der Architektur wird man schnell feststellen, dass mehrere Rechner benötigt werden, um überhaupt alle Komponenten abbilden zu können: Zum einen gilt es, den oder die OVM Server selbst zu installieren. Das ist recht leicht und schnell erledigt, aber da Oracle VM ein „Typ 1 Hypervisor ist“ - also direkt auf dem Rechner („bare metal“) installiert wird – ist der eigenen Arbeits-PC oder Laptop dafür recht ungeeignet. (Eine Dual-Boot Umgebung wäre zwar denkbar, aber recht unpraktisch.) Zum anderen wird auch ein Rechner benötigt, auf dem der OVM Manager installiert wird. Im Gegensatz zum OVM Server erfolgt dessen Installation nicht „bare metal“, sondern auf einem bestehenden Oracle Linux. Aber was tun, wenn man gerade keinen Linux-Server griffbereit hat und auch keine extra Hardware dafür opfern will? Möchte man alle Funktionen von Oracle VM austesten, so sollte man zusätzlich über einen Shared Storag everüfugen. Dieser kann wahlweise über NFS oder über ein SAN (per iSCSI oder FibreChannel) angebunden werden. Zwar braucht man zum Testen nicht zwingend entsprechende „echte“ Storage-Hardware, aber auch die „Simulation“ entsprechender Komponenten erfordert zusätzliche Hardware mit entsprechendem freien Plattenplatz.(Alternativ können auch fertige „Software Storage Appliances“ wie z.B. OpenFiler oder FreeNAS verwendet werden). Angenommen, es stehen tatsächlich keine „echte“ Server- und Storage Hardware zur Verfügung, so benötigt man für die oben genannten drei Punkte  drei bzw. vier Rechner (PCs, Laptops...) - je nachdem ob man einen oder zwei OVM Server starten möchte. Erfreulicherweise geht es aber auch mit deutlich weniger Aufwand: Wie bereits kurz im Blogpost anlässlich des letzten OVM-Releases 3.1.1 beschrieben, ist die aktuelle Version in der Lage, selbst vollständig innerhalb von VirtualBox als Gast zu laufen. Wer bei dieser „doppelten Virtualisierung“ nun an das Prinzip der russischen Matroschka-Puppen denkt, liegt genau richtig. Oracle VM VirtualBox stellt dabei gewissermaßen die äußere Hülle dar – und da es sich bei VirtualBox im Gegensatz zu Oracle VM Server um einen „Typ 2 Hypervisor“ handelt, funktioniert dieser Ansatz auch auf einem „normalen“ Arbeits-PC bzw. Laptop, ohne dessen eigentliche Betriebsystem komplett zu überschreiben. Doch das beste dabei ist: Die Installation der jeweiligen VirtualBox VMs muss man nicht selber durchführen. Der OVM Manager als auch der OVM Server stehen bereits als vorgefertigte „VirtualBox Appliances“ im Oracle Technology Network zum Download zur Verfügung und müssen im Grunde nur noch importiert und konfiguriert werden. Das folgende Schaubild verdeutlicht das Prinzip: Die dunkelgrünen Bereiche stellen jeweils Instanzen der eben erwähnten VirtualBox Appliances für OVM Server und OVM Manager dar. (Hier im Bild sind zwei OVM Server zu sehen, als Minimum würde natürlich auch einer genügen. Dann können aber viele Features wie z.B. OVM HA nicht ausprobieren werden.) Als cleveren Trick zur Einsparung einer weiteren VM für Storage-Zwecke hat Wim Coekaerts (Senior Vice President of Linux and Virtualization Engineering bei Oracle), der „Erbauer“ der VirtualBox Appliances, die OVM Manager Appliance bereits so vorbereitet, dass diese gleichzeitig als NFS-Share (oder ggf. sogar als iSCSI Target) dienen kann. Dies beschreibt er auch kurz auf seinem Blog. Die hellgrünen Ovale stellen die VMs dar, welche dann innerhalb einer der virtualisierten OVM Server laufen können. Aufgrund der Tatsache, dass durch diese „doppelte Virtualisierung“ die Fähigkeit zur Hardware-Virtualisierung verloren geht, können diese „Nutz-VMs“ demzufolge nur paravirtualisiert sein (PVM). Die hier in blau eingezeichneten Netzwerk-Schnittstellen sind virtuelle Interfaces, welche beliebig innerhalb von VirtualBox eingerichtet werden können. Wer die verschiedenen Netzwerk-Rollen innerhalb von Oracle VM im Detail ausprobieren will, kann hier natürlich auch mehr als zwei dieser Interfaces konfigurieren. Die Vorteile dieser Lösung für Test- und Demozwecke liegen auf der Hand: Mit lediglich einem PC bzw. Laptop auf dem VirtualBox installiert ist, können alle oben genannten Komponenten installiert und genutzt werden – genügend RAM vorausgesetzt. Als Minimum darf hier 8GB gelten. Soll auf der „Host-Umgebung“ (also dem PC auf dem VirtualBox läuft) nebenbei noch gearbeiten werden und/oder mehrere „Nutz-VMs“ in dieser simulierten OVM-Server-Umgebung laufen, empfehlen sich natürlich eher 16GB oder mehr. Da die nötigen Schritte zum Installieren und initialen Konfigurieren der Umgebung ausführlich in einem entsprechenden Paper beschrieben sind, möchte ich im Rest dieses Artikels noch einige zusätzliche Tipps und Details erwähnen, welche einem das Leben etwas leichter machen können: Um möglichst entstpannt und mit zusätzlichen „Sicherheitsnetz“ an die Konfiguration der Umgebung herangehen zu können, empfiehlt es sich, ausgiebigen Gebrauch von der in VirtualBox eingebauten Funktionalität der VM Snapshots zu machen. Dies ermöglicht nicht nur ein Zurücksetzen falls einmal etwas schiefgehen sollte, sondern auch ein beliebiges Wiederholen von bereits absolvierten Teilschritten (z.B. um eine andere Idee oder Variante der Umgebung auszuprobieren). Sowohl bei den gerade erwähnten Snapshots als auch bei den VMs selbst sollte man aussagekräftige Namen verwenden. So ist sichergestellt, dass man nicht durcheinander kommt und auch nach ein paar Wochen noch weiß, welche Umgebung man da eigentlich vor sich hat. Dies beinhaltet auch die genaue Versions- und Buildnr. des jeweiligen OVM-Releases. (Siehe dazu auch folgenden Screenshot.) Weitere Informationen und Details zum aktuellen Zustand sowie Zweck der jeweiligen VMs kann in dem oft übersehenen Beschreibungsfeld hinterlegt werden. Es empfiehlt sich, bereits VOR der Installation einen Notizzettel (oder eine Textdatei) mit den geplanten IP-Adressen und Namen für die VMs zu erstellen. (Nicht vergessen: Auch der Server Pool benötigt eine eigene IP.) Dabei sollte man auch nochmal die tatsächlichen Netzwerke der zu verwendenden Virtualbox-Interfaces prüfen und notieren. Achtung: Es gibt im Rahmen der Installation einige Passworte, die vom Nutzer gesetzt werden können – und solche, die zunächst fest eingestellt sind. Zu letzterem gehört das Passwort für den ovs-agent sowie den root-User auf den OVM Servern, welche beide per Default „ovsroot“ lauten. (Alle weiteren Passwort-Informationen sind in dem „Read me first“ Dokument zu finden, welches auf dem Desktop der OVM Manager VM liegt.) Aufpassen muss man ggf. auch in der initialen „Interview-Phase“ welche die VirtualBox VMs durchlaufen, nachdem sie das erste mal gebootet werden. Zu diesem Zeitpunkt ist nämlich auf jeden Fall noch die amerikanische Tastaturbelegung aktiv, so dass man z.B. besser kein „y“ und „z“ in seinem selbst gewählten Passwort verwendet. Aufgrund der Tatsache, dass wie oben erwähnt der OVM Manager auch gleichzeitig den Shared Storage bereitstellt, sollte darauf geachtet werden, dass dessen VM vor den OVM Server VMs gestartet wird. (Andernfalls „findet“ der dem OVM Server Pool zugrundeliegende Cluster sein sog. „Server Pool File System“ nicht.)

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• How to run node.js app on port 80? Are processes blocking my port?

  - by Lucas

  I believe the port 80 on my remote instance is blocked, and I am trying to run a node.js app using port 80. I have experimented with ports 3000 and 3002, and both ports are working fine, but I get an error when running on port 80. I suspect port 80 is blocked from my output of netstat -an below, but how can I find the process id's of the addresses that are blocking port 80 below? [lucas@ecoinstance]~/node/nodetest1$ netstat -an Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 127.0.0.1:27017 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:3002 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:27017 127.0.0.1:51108 ESTABLISHED tcp 0 0 127.0.0.1:51106 127.0.0.1:27017 ESTABLISHED tcp 0 0 127.0.0.1:27017 127.0.0.1:51106 ESTABLISHED tcp 0 0 127.0.0.1:51107 127.0.0.1:27017 ESTABLISHED tcp 0 0 10.240.241.116:3002 174.61.171.61:36583 TIME_WAIT tcp 0 0 127.0.0.1:27017 127.0.0.1:51109 ESTABLISHED tcp 0 0 10.240.241.116:42423 169.254.169.254:80 ESTABLISHED tcp 0 0 127.0.0.1:51108 127.0.0.1:27017 ESTABLISHED tcp 0 532 10.240.241.116:22 174.61.171.61:56824 ESTABLISHED tcp 0 0 127.0.0.1:27017 127.0.0.1:51107 ESTABLISHED tcp 0 0 10.240.241.116:42412 169.254.169.254:80 ESTABLISHED tcp 0 0 127.0.0.1:51109 127.0.0.1:27017 ESTABLISHED tcp 0 0 127.0.0.1:51105 127.0.0.1:27017 ESTABLISHED tcp 0 0 10.240.241.116:42422 169.254.169.254:80 TIME_WAIT tcp 0 0 127.0.0.1:27017 127.0.0.1:51105 ESTABLISHED tcp6 0 0 :::22 :::* LISTEN udp 0 0 0.0.0.0:49948 0.0.0.0:* udp 0 0 0.0.0.0:68 0.0.0.0:* udp 0 0 10.240.241.116:123 0.0.0.0:* udp 0 0 127.0.0.1:123 0.0.0.0:* udp 0 0 0.0.0.0:123 0.0.0.0:* udp6 0 0 :::12151 :::* udp6 0 0 :::123 :::* Active UNIX domain sockets (servers and established) Proto RefCnt Flags Type State I-Node Path unix 2 [ ACC ] STREAM LISTENING 405680 /tmp/ssh-KdkxJfFLpKTC/agent.22 813 unix 2 [ ACC ] STREAM LISTENING 408230 /tmp/ssh-ofUeNNEwAqtP/agent.22 243 unix 2 [ ACC ] STREAM LISTENING 416227 /tmp/mongodb-27017.sock unix 2 [ ACC ] SEQPACKET LISTENING 3692 /run/udev/control unix 7 [ ] DGRAM 5286 /dev/log unix 2 [ ACC ] STREAM LISTENING 5318 /var/run/acpid.socket unix 2 [ ACC ] STREAM LISTENING 16170 /tmp//tmux-1000/default unix 2 [ ACC ] STREAM LISTENING 414450 /var/run/dbus/system_bus_socke And here is the log when trying to run on port 80 with node.js: [lucas@ecoinstance]~/node/nodetest1$ npm start > [email protected] start /home/lucas/node/nodetest1 > node ./bin/www events.js:72 throw er; // Unhandled 'error' event ^ Error: listen EACCES at errnoException (net.js:904:11) at Server._listen2 (net.js:1023:19) at listen (net.js:1064:10) at Server.listen (net.js:1138:5) at Function.app.listen (/home/lucas/node/nodetest1/node_modules/express/lib/applicati on.js:532:24) at Object.<anonymous> (/home/lucas/node/nodetest1/bin/www:7:18) at Module._compile (module.js:456:26) at Object.Module._extensions..js (module.js:474:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) npm ERR! [email protected] start: `node ./bin/www` npm ERR! Exit status 8 npm ERR! npm ERR! Failed at the [email protected] start script. npm ERR! This is most likely a problem with the nodetest1 package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! node ./bin/www npm ERR! You can get their info via: npm ERR! npm owner ls nodetest1 npm ERR! There is likely additional logging output above. npm ERR! System Linux 3.13-0.bpo.1-amd64 npm ERR! command "/usr/local/bin/node" "/usr/local/bin/npm" "start" npm ERR! cwd /home/lucas/node/nodetest1 npm ERR! node -v v0.10.28 npm ERR! npm -v 1.4.9 npm ERR! code ELIFECYCLE npm ERR! npm ERR! Additional logging details can be found in: npm ERR! /home/lucas/node/nodetest1/npm-debug.log npm ERR! not ok code 0 And sudo netstat -lnp does not return any matching port 80's: [lucas@ecoinstance]~/node/nodetest1$ sudo netstat -lnp [48/648] Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Progr am name tcp 0 0 127.0.0.1:27017 0.0.0.0:* LISTEN 29160/mon god tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1976/sshd tcp6 0 0 :::22 :::* LISTEN 1976/sshd udp 0 0 0.0.0.0:49948 0.0.0.0:* 1604/dhcl ient udp 0 0 0.0.0.0:68 0.0.0.0:* 1604/dhcl ient udp 0 0 10.240.241.116:123 0.0.0.0:* 2076/ntpd udp 0 0 127.0.0.1:123 0.0.0.0:* 2076/ntpd udp 0 0 0.0.0.0:123 0.0.0.0:* 2076/ntpd udp6 0 0 :::12151 :::* 1604/dhcl ient udp6 0 0 :::123 :::* 2076/ntpd Active UNIX domain sockets (only servers) Proto RefCnt Flags Type State I-Node PID/Program name Path unix 2 [ ACC ] STREAM LISTENING 405680 22814/ssh-agent /tmp/ssh-K dkxJfFLpKTC/agent.22813 unix 2 [ ACC ] STREAM LISTENING 408230 24049/ssh-agent /tmp/ssh-o fUeNNEwAqtP/agent.22243 unix 2 [ ACC ] STREAM LISTENING 416227 29160/mongod /tmp/mongo db-27017.sock unix 2 [ ACC ] SEQPACKET LISTENING 3692 284/udevd /run/udev/ control unix 2 [ ACC ] STREAM LISTENING 5318 1798/acpid /var/run/a cpid.socket unix 2 [ ACC ] STREAM LISTENING 16170 5177/tmux /tmp//tmux -1000/default unix 2 [ ACC ] STREAM LISTENING 414450 28213/dbus-daemon /var/run/d bus/system_bus_socket unix 2 [ ACC ] STREAM LISTENING 404225 22324/1 /tmp/ssh-9 TlDmu4bjl/agent.22324

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• Getting java.lang.ClassNotFoundException: com.mysql.jdbc.Driver Exception

  - by Yashwant Chavan

  Hi , I am getting Following Exception while configuring the Connection Pool in Tomcat This is Context.xml <Context path="/DBTest" docBase="DBTest" debug="5" reloadable="true" crossContext="true"> <!-- maxActive: Maximum number of dB connections in pool. Make sure you configure your mysqld max_connections large enough to handle all of your db connections. Set to -1 for no limit. --> <!-- maxIdle: Maximum number of idle dB connections to retain in pool. Set to -1 for no limit. See also the DBCP documentation on this and the minEvictableIdleTimeMillis configuration parameter. --> <!-- maxWait: Maximum time to wait for a dB connection to become available in ms, in this example 10 seconds. An Exception is thrown if this timeout is exceeded. Set to -1 to wait indefinitely. --> <!-- username and password: MySQL dB username and password for dB connections --> <!-- driverClassName: Class name for the old mm.mysql JDBC driver is org.gjt.mm.mysql.Driver - we recommend using Connector/J though. Class name for the official MySQL Connector/J driver is com.mysql.jdbc.Driver. --> <!-- url: The JDBC connection url for connecting to your MySQL dB. --> <Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource" maxActive="100" maxIdle="30" maxWait="10000" username="root" password="password" driverClassName="com.mysql.jdbc.Driver" url="jdbc:mysql:///BUSINESS"/> </Context> This is Bean Entry <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="jdbc/TestDB"></property> <property name="resourceRef" value="true"></property> </bean> org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Co nnection; nested exception is org.apache.tomcat.dbcp.dbcp.SQLNestedException: Ca nnot load JDBC driver class 'com.mysql.jdbc.Driver' at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(Dat aSourceUtils.java:82) at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java: 382) at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:45 8) at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:46 6) at com.businesscaliber.dao.Dao.getQueryForListMap(Dao.java:66) at com.businesscaliber.dao.MiscellaneousDao.getDefaultSucessStory(Miscel laneousDao.java:109) at com.businesscaliber.listeners.BusinessContextLoader.contextInitialize d(BusinessContextLoader.java:40) at org.apache.catalina.core.StandardContext.listenerStart(StandardContex t.java:3795) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4 252) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase .java:760) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:74 0) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:831) at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:720 ) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490 ) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1150) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java :311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl eSupport.java:120) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022) at org.apache.catalina.core.StandardHost.start(StandardHost.java:736) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443 ) at org.apache.catalina.core.StandardService.start(StandardService.java:4 48) at org.apache.catalina.core.StandardServer.start(StandardServer.java:700 ) at org.apache.catalina.startup.Catalina.start(Catalina.java:552) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433) Caused by: org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driv er class 'com.mysql.jdbc.Driver' at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDat aSource.java:1136) at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSo urce.java:880) at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(D ataSourceUtils.java:113) at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(Dat aSourceUtils.java:79) ... 30 more Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:164) at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDat aSource.java:1130)

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• IE adding a attribute 'done[number]' ??

  - by Phil Jackson

  Hi all im struggling to find an answer to my problem here. I've made a IM application the same as facebooks but it is having problems in IE. The problem started as I kept seeing rn at the beginnning of every post made via IE. That was due to stripslashes function. But as I was investigating I noticed my tag was being added an attribut 'done'; <li><UL done67="7">rn<LI class=name>ACTwebDesigns</LI>rn<LI class=speech>hello</LI></UL></li> <li><UL done1="4">rn<LI class=name>ACTwebDesigns</LI>rn<LI class=speech>foo</LI></UL></li> <li><UL done84="10">rn<LI class=name>ACTwebDesigns</LI>rn<LI class=speech>barr</LI>rn<LI class=speech ?>foobar</LI></UL></li> <li><UL done88="14">rn<LI class=name>ACTwebDesigns</LI>rn<LI class=speech>this is a test</LI></UL></li> does anyone know of a reason why IE would add this attribute? EDIT: function checkForm() { $(".chat_input").keydown(function(e){ if ( e.keyCode == 13 ) { var data = strip_tags($(this).val()); var username = $("#users_username").val(); var box = $(this).parents('div:eq(0)'); $(this).val(""); if( box.find('.conversation_box li.' + session_number ).length == 0 ) { var conversation_list = box.find('.conversation_box').html(); var insert_data = '<li class="' + session_number + '"><ul><li class="name">' + username + '</li><li class="speech">' + data + '</li></ul></li>'; box.find('.conversation_box').html(conversation_list + insert_data); bottom(); }else{ var conversation_list = box.find('.conversation_box li.' + session_number + ' ul').html(); var insert_data = '<li class="speech"">' + data + '</li>'; box.find('.conversation_box li.' + session_number + ' ul').html(conversation_list + insert_data); bottom(); } return false; } }); } function store_chat(){ try{ var token = $("#token").val(); var openedBoxes = $("li.conversation_list"); openedBoxes.each(function(){ var boxContainer = $(this).parents('div:eq(0)'); var amount = boxContainer.find('.conversation_box li').length; var p = boxContainer.find('.open_trigger').html(); var u = $("#users_username").val(); if( amount != 0 ){ if( $(this).parents('div:eq(0)').find('.conversation_box li.' + session_number ).length != 0 ) { var session_contents = $(this).parents('div:eq(0)').find('.conversation_box li.' + session_number ).html(); alert( session_contents ); $.ajax({ type: 'POST', url: './', data: 'token=' + token + '&re=7&s=' + amount + '&sd=' + session_contents + '&u=' + u + '&p=' + p, cache: false, timeout: 5000, success: function(html){ auth(html); boxContainer.find('.conversation_box').html(html); bottom(); } }); } } }); }catch(er){} }

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• Write to file depending on minSdkVersion - android

  - by Simon Rosenqvist

  Hi, I have written a filewriter for my android application. It is to function on a Galaxy Tab, so my minSdkVersion has to be at least 4, so it will fill the screen. I originally started out with SdkVersion = 2 and at that point my filewriter worked perfectly. Changing the SdkVersion to 4 introduced the problem. My filewriter doesn't work anymore! The application runs fine, but a file doesn't get created. My .java file looks like this: public class HelloAndroid extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); TextView tv = new TextView(this); tv.setText("Hello, Android"); setContentView(R.layout.main); //definerer en knap kaldet button1 og sætter en listener på denne. Button button1 = (Button)findViewById(R.id.btnClickMe); button1.setOnClickListener(btnListener); //definerer en knap kaldet button2 og sætter en listener på denne. Button button2 = (Button)findViewById(R.id.btnClickMe2); button2.setOnClickListener(btnListener2); } //en variabel af typen 'long' deklæres og kaldes tid1. public long time1; private OnClickListener btnListener = new OnClickListener() { public void onClick(View v) { //Når der klikkes på button1 gemmes et tal i variablen tid1. time1 = System.currentTimeMillis(); } }; //en variabel af typen 'long' deklæres og kaldes tid2. public long time2; // en variabel af typen 'string' deklæres og kaldes tid: public String string1 = "time:"; private OnClickListener btnListener2 = new OnClickListener() { public void onClick(View v) { //Når der klikkes på button2 gemmes et tal i variablen tid2. time2 = System.currentTimeMillis(); // Herefter oprettes en fil kaldet "file.txt". try{ File file = new File(Environment.getExternalStorageDirectory(), "file.txt"); file.createNewFile(); BufferedWriter writer = new BufferedWriter(new FileWriter(file,true)); //string1 og tid2-tid1 skrives til filen. tid2-tid1 giver den tid der går fra der er trykket på den ene knap til den anden i millisekunder. writer.write(string1 + "\t" + (time2-time1)); writer.newLine(); writer.flush(); writer.close(); } catch (IOException e) { e.printStackTrace(); } } }; } And my manifest.xml looks like this: <?xml version="1.0" encoding="utf-8"?> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".HelloAndroid" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> Why does my filewriter not work with minSdkVersion 2? Do i have to make a new filewriter? or what to do? Sorry for the messy code, i'm quite new to programming :)

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• Trying to import SQL file in a xampp server returns error

  - by Victor_J_Martin

  I have done a ER diagram in Mysql Workbench, and I am trying load in my server with phpMyAdmin, but it returns me the next error: Error SQL Query: -- ----------------------------------------------------- -- Table `BDA`.`UG` -- ----------------------------------------------------- CREATE TABLE IF NOT EXISTS `BDA`.`UG` ( `numero_ug` INT NOT NULL, `nombre` VARCHAR(45) NOT NULL, `segunda_firma_autorizada` VARCHAR(45) NOT NULL, `fecha_creacion` DATE NOT NULL, `nombre_depto` VARCHAR(140) NOT NULL, `dni` INT NOT NULL, `anho_contable` INT NOT NULL, PRIMARY KEY (`numero_ug`), INDEX `nombre_depto_idx` (`nombre_depto` ASC), INDEX `dni_idx` (`dni` ASC), INDEX `anho_contable_idx` (`anho_contable` ASC), CONSTRAINT `nombre_depto` FOREIGN KEY (`nombre_depto`) REFERENCES `BDA`.`Departamento` (`nombre_depto`) ON DELETE NO ACTION ON UPDATE NO ACTION, CONSTRAINT `dni` FOREIGN KEY (`dni`) REFERENCES `BDA`.`Trabajador` (`dni`) ON DELETE NO ACTION ON UPDATE NO ACTION, CONSTRAINT `anho_contable` FOREIGN KEY (`anho_contable`) REFERENCES `BDA`.`Capitulo_Contable` (`anho_contable`) [...] MySQL said: Documentation #1022 - Can't write; duplicate key in table 'ug' I export the result of the diagram from Mysql Workbench to a SQL file, and this file is what I'm trying to upload. This is the file. I can not find the duplicate key. SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0; SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0; SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='TRADITIONAL,ALLOW_INVALID_DATES'; CREATE SCHEMA IF NOT EXISTS `BDA` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci ; USE `BDA` ; -- ----------------------------------------------------- -- Table `BDA`.`Departamento` -- ----------------------------------------------------- CREATE TABLE IF NOT EXISTS `BDA`.`Departamento` ( `nombre_depto` VARCHAR(140) NOT NULL, `area_depto` VARCHAR(140) NOT NULL, PRIMARY KEY (`nombre_depto`)) ENGINE = InnoDB; -- ----------------------------------------------------- -- Table `BDA`.`Trabajador` -- ----------------------------------------------------- CREATE TABLE IF NOT EXISTS `BDA`.`Trabajador` ( `dni` INT NOT NULL, `direccion` VARCHAR(140) NOT NULL, `nombre` VARCHAR(45) NOT NULL, `apellidos` VARCHAR(140) NOT NULL, `fecha_nacimiento` DATE NOT NULL, `fecha_contrato` DATE NOT NULL, `titulacion` VARCHAR(140) NULL, `nombre_depto` VARCHAR(45) NOT NULL, PRIMARY KEY (`dni`), INDEX `nombre_depto_idx` (`nombre_depto` ASC), CONSTRAINT `nombre_depto` FOREIGN KEY (`nombre_depto`) REFERENCES `BDA`.`Departamento` (`nombre_depto`) ON DELETE NO ACTION ON UPDATE NO ACTION) ENGINE = InnoDB; -- ----------------------------------------------------- -- Table `BDA`.`Capitulo_Contable` -- ----------------------------------------------------- CREATE TABLE IF NOT EXISTS `BDA`.`Capitulo_Contable` ( `anho_contable` INT NOT NULL, `numero_ug` INT NOT NULL, `debe` DOUBLE NOT NULL, `haber` DOUBLE NOT NULL, PRIMARY KEY (`anho_contable`), INDEX `numero_ug_idx` (`numero_ug` ASC), CONSTRAINT `numero_ug` FOREIGN KEY (`numero_ug`) REFERENCES `BDA`.`UG` (`numero_ug`) ON DELETE NO ACTION ON UPDATE NO ACTION) ENGINE = InnoDB; -- ----------------------------------------------------- -- Table `BDA`.`UG` -- ----------------------------------------------------- CREATE TABLE IF NOT EXISTS `BDA`.`UG` ( `numero_ug` INT NOT NULL, `nombre` VARCHAR(45) NOT NULL, `segunda_firma_autorizada` VARCHAR(45) NOT NULL, `fecha_creacion` DATE NOT NULL, `nombre_depto` VARCHAR(140) NOT NULL, `dni` INT NOT NULL, `anho_contable` INT NOT NULL, PRIMARY KEY (`numero_ug`), INDEX `nombre_depto_idx` (`nombre_depto` ASC), INDEX `dni_idx` (`dni` ASC), INDEX `anho_contable_idx` (`anho_contable` ASC), CONSTRAINT `nombre_depto` FOREIGN KEY (`nombre_depto`) REFERENCES `BDA`.`Departamento` (`nombre_depto`) ON DELETE NO ACTION ON UPDATE NO ACTION, CONSTRAINT `dni` FOREIGN KEY (`dni`) REFERENCES `BDA`.`Trabajador` (`dni`) ON DELETE NO ACTION ON UPDATE NO ACTION, CONSTRAINT `anho_contable` FOREIGN KEY (`anho_contable`) REFERENCES `BDA`.`Capitulo_Contable` (`anho_contable`) ON DELETE NO ACTION ON UPDATE NO ACTION) ENGINE = InnoDB; -- ----------------------------------------------------- -- Table `BDA`.`Cliente` -- ----------------------------------------------------- CREATE TABLE IF NOT EXISTS `BDA`.`Cliente` ( `cif_cliente` INT NOT NULL, `nombre_cliente` VARCHAR(140) NOT NULL, PRIMARY KEY (`cif_cliente`)) ENGINE = InnoDB; -- ----------------------------------------------------- -- Table `BDA`.`Ingreso` -- ----------------------------------------------------- CREATE TABLE IF NOT EXISTS `BDA`.`Ingreso` ( `id` INT NOT NULL, `concepto` VARCHAR(45) NOT NULL, `importe` DOUBLE NOT NULL, `fecha` DATE NOT NULL, `cif_cliente` INT NOT NULL, `numero_ug` INT NOT NULL, PRIMARY KEY (`id`), INDEX `cif_cliente_idx` (`cif_cliente` ASC), INDEX `numero_ug_idx` (`numero_ug` ASC), CONSTRAINT `cif_cliente` FOREIGN KEY (`cif_cliente`) REFERENCES `BDA`.`Cliente` (`cif_cliente`) ON DELETE NO ACTION ON UPDATE NO ACTION, CONSTRAINT `numero_ug` FOREIGN KEY (`numero_ug`) REFERENCES `BDA`.`UG` (`numero_ug`) ON DELETE NO ACTION ON UPDATE NO ACTION) ENGINE = InnoDB; -- ----------------------------------------------------- -- Table `BDA`.`Proveedor` -- ----------------------------------------------------- CREATE TABLE IF NOT EXISTS `BDA`.`Proveedor` ( `cif_proveedor` INT NOT NULL, `nombre_proveedor` VARCHAR(140) NOT NULL, PRIMARY KEY (`cif_proveedor`)) ENGINE = InnoDB; -- ----------------------------------------------------- -- Table `BDA`.`Gasto` -- ----------------------------------------------------- CREATE TABLE IF NOT EXISTS `BDA`.`Gasto` ( `id` INT NOT NULL, `concepto` VARCHAR(45) NOT NULL, `importe` DOUBLE NOT NULL, `fecha` DATE NOT NULL, `factura` INT NOT NULL, `cif_proveedor` INT NOT NULL, `numero_ug` INT NOT NULL, PRIMARY KEY (`id`), INDEX `cif_proveedor_idx` (`cif_proveedor` ASC), INDEX `numero_ug_idx` (`numero_ug` ASC), CONSTRAINT `cif_proveedor` FOREIGN KEY (`cif_proveedor`) REFERENCES `BDA`.`Proveedor` (`cif_proveedor`) ON DELETE NO ACTION ON UPDATE NO ACTION, CONSTRAINT `numero_ug` FOREIGN KEY (`numero_ug`) REFERENCES `BDA`.`UG` (`numero_ug`) ON DELETE NO ACTION ON UPDATE NO ACTION) ENGINE = InnoDB; SET SQL_MODE=@OLD_SQL_MODE; SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS; SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS; Thanks for your advices.

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• Windows DD-esque implementation in Qt 5

  - by user1777667

  I'm trying to get into Qt and as a project I want to try and pull a binary image from a hard drive in Windows. This is what I have: QFile dsk("//./PhysicalDrive1"); dsk.open(QIODevice::ReadOnly); QByteArray readBytes = dsk.read(512); dsk.close(); QFile img("C:/out.bin"); img.open(QIODevice::WriteOnly); img.write(readBytes); img.close(); When I run it, it creates the file, but when I view it in a hex editor, it says: ëR.NTFS ..........ø..?.ÿ.€.......€.€.ÿç......UT..............ö.......ì§á.Íá.`....ú3ÀŽÐ¼.|ûhÀ...hf.ˈ...f.>..NTFSu.´A»ªUÍ.r..ûUªu.÷Á..u.éÝ..ƒì.h..´HŠ...‹ô..Í.ŸƒÄ.žX.rá;...uÛ£..Á.....Z3Û¹. +Èfÿ.......ŽÂÿ...èK.+Èwï¸.»Í.f#Àu-f.ûTCPAu$.ù..r..h.».hp..h..fSfSfU...h¸.fa..Í.3À¿(.¹Ø.üóªé_...f`..f¡..f.....fh....fP.Sh..h..´BŠ.....‹ôÍ.fY[ZfYfY..‚..fÿ.......ŽÂÿ...u¼..faàø.è.. û.è..ôëý´.‹ð¬<.t.´.»..Í.ëòÃ..A disk read error occurred...BOOTMGR is missing...BOOTMGR is compressed...Press Ctrl+Alt+Del to restart...Œ©¾Ö..Uª Is there a better way of doing this? I tried running it as admin, but still no dice. Any help would be much appreciated. Update: I changed the code a bit. Now if I specify a dd images as the input it writes the image perfectly, but when I try to use a disk as the input it only writes 0x00. QTextStream(stdout) << "Start\n"; QFile dsk("//./d:"); //QFile dsk("//./PhysicalDrive1"); //QFile dsk("//?/Device/Harddisk1/Partition0"); //QFile dsk("//./Volume{e988ffc3-3512-11e3-99d8-806e6f6e6963}"); //QFile dsk("//./Volume{04bbc7e2-a450-11e3-a9d9-902b34d5484f}"); //QFile dsk("C:/out_2.bin"); if (!dsk.open(QIODevice::ReadOnly)) qDebug() << "Failed to open:" << dsk.errorString(); qDebug() << "Size:" << dsk.size() << "\n"; // Blank out image file QFile img(dst); img.open(QIODevice::WriteOnly); img.write(0); img.close(); // Read and write operations while (!dsk.atEnd()) { QByteArray readBytes = dsk.readLine(); qDebug() << "Reading: " << readBytes.size() << "\n"; QFile img(dst); if (!img.open(QIODevice::Append)) qDebug() << "Failed to open:" << img.errorString(); img.write(readBytes); } QTextStream(stdout) << "End\n"; I guess the real problem I'm having is how to open a volume with QFile in Windows. I tried a few variants, but to no avail.

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