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• Building an Infrastructure Cloud with Oracle VM for x86 + Enterprise Manager 12c

  - by Richard Rotter

  Cloud Computing? Everyone is talking about Cloud these days. Everyone is explaining how the cloud will help you to bring your service up and running very fast, secure and with little effort. You can find these kinds of presentations at almost every event around the globe. But what is really behind all this stuff? Is it really so simple? And the answer is: Yes it is! With the Oracle SW Stack it is! In this post, I will try to bring this down to earth, demonstrating how easy it could be to build a cloud infrastructure with Oracle's solution for cloud computing.But let me cover some basics first: How fast can you build a cloud?How elastic is your cloud so you can provide new services on demand? How much effort does it take to monitor and operate your Cloud Infrastructure in order to meet your SLAs?How easy is it to chargeback for your services provided? These are the critical success factors of Cloud Computing. And Oracle has an answer to all those questions. By using Oracle VM for X86 in combination with Enterprise Manager 12c you can build and control your cloud environment very fast and easy. What are the fundamental building blocks for your cloud? Oracle Cloud Building Blocks #1 Hardware Surprise, surprise. Even the cloud needs to run somewhere, hence you will need hardware. This HW normally consists of servers, storage and networking. But Oracles goes beyond that. There are Optimized Solutions available for your cloud infrastructure. This is a cookbook to build your HW cloud platform. For example, building your cloud infrastructure with blades and our network infrastructure will reduce complexity in your datacenter (Blades with switch network modules, splitter cables to reduce the amount of cables, TOR (Top Of the Rack) switches which are building the interface to your infrastructure environment. Reducing complexity even in the cabling will help you to manage your environment more efficient and with less risk. Of course, our engineered systems fit into the cloud perfectly too. Although they are considered as a PaaS themselves, having the database SW (for Exadata) and the application development environment (for Exalogic) already deployed on them, in general they are ideal systems to enable you building your own cloud and PaaS infrastructure. #2 Virtualization The next missing link in the cloud setup is virtualization. For me personally, it's one of the most hidden "secret", that oracle can provide you with a complete virtualization stack in terms of a hypervisor on both architectures: X86 and Sparc CPUs. There is Oracle VM for X86 and Oracle VM for Sparc available at no additional  license costs if your are running this virtualization stack on top of Oracle HW (and with Oracle Premier Support for HW). This completes the virtualization portfolio together with Solaris Zones introduced already with Solaris 10 a few years ago. Let me explain how Oracle VM for X86 works: Oracle VM for x86 consists of two main parts: - The Oracle VM Server: Oracle VM Server is installed on bare metal and it is the hypervisor which is able to run virtual machines. It has a very small footprint. The ISO-Image of Oracle VM Server is only 200MB large. It is very small but efficient. You can install a OVM-Server in less than 5 mins by booting the Server with the ISO-Image assigned and providing the necessary configuration parameters (like installing an Linux distribution). After the installation, the OVM-Server is ready to use. That's all. - The Oracle VM-Manager: OVM-Manager is the central management tool where you can control your OVM-Servers. OVM-Manager provides the graphical user interface, which is an Application Development Framework (ADF) application, with a familiar web-browser based interface, to manage Oracle VM Servers, virtual machines, and resources. The Oracle VM Manager has the following capabilities: Create virtual machines Create server pools Power on and off virtual machines Manage networks and storage Import virtual machines, ISO files, and templates Manage high availability of Oracle VM Servers, server pools, and virtual machines Perform live migration of virtual machines I want to highlight one of the goodies which you can use if you are running Oracle VM for X86: Preconfigured, downloadable Virtual Machine Templates form edelivery With these templates, you can download completely preconfigured Virtual Machines in your environment, boot them up, configure them at first time boot and use it. There are templates for almost all Oracle SW and Applications (like Fusion Middleware, Database, Siebel, etc.) available. #3) Cloud Management The management of your cloud infrastructure is key. This is a day-to-day job. Acquiring HW, installing a virtualization layer on top of it is done just at the beginning and if you want to expand your infrastructure. But managing your cloud, keeping it up and running, deploying new services, changing your chargeback model, etc, these are the daily jobs. These jobs must be simple, secure and easy to manage. The Enterprise Manager 12c Cloud provides this functionality from one management cockpit. Enterprise Manager 12c uses Oracle VM Manager to control OVM Serverpools. Once you registered your OVM-Managers in Enterprise Manager, then you are able to setup your cloud infrastructure and manage everything from Enterprise Manager. What you need to do in EM12c is: ">Register your OVM Manager in Enterprise ManagerAfter Registering your OVM Manager, all the functionality of Oracle VM for X86 is also available in Enterprise Manager. Enterprise Manager works as a "Manger" of the Manager. You can register as many OVM-Managers you want and control your complete virtualization environment Create Roles and Users for your Self Service Portal in Enterprise ManagerWith this step you allow users to logon on the Enterprise Manager Self Service Portal. Users can request Virtual Machines in this portal. Setup the Cloud InfrastructureSetup the Quotas for your self service users. How many VMs can they request? How much of your resources ( cpu, memory, storage, network, etc. etc.)? Which SW components (templates, assemblys) can your self service users request? In this step, you basically set up the complete cloud infrastructure. Setup ChargebackOnce your cloud is set up, you need to configure your chargeback mechanism. The Enterprise Manager collects the resources metrics, which are used in a very deep level. Almost all collected Metrics could be used in the chargeback module. You can define chargeback plans based on configurations (charge for the amount of cpu, memory, storage is assigned to a machine, or for a specific OS which is installed) or chargeback on resource consumption (% of cpu used, storage used, etc). Or you can also define a combination of configuration and consumption chargeback plans. The chargeback module is very flexible. Here is a overview of the workflow how to handle infrastructure cloud in EM: Summary As you can see, setting up an Infrastructure Cloud Service with Oracle VM for X86 and Enterprise Manager 12c is really simple. I personally configured a complete cloud environment with three X86 servers and a small JBOD san box in less than 3 hours. There is no magic in it, it is all straightforward. Of course, you have to have some experience with Oracle VM and Enterprise Manager. Experience in setting up Linux environments helps as well. I plan to publish a technical cookbook in the next few weeks. I hope you found this post useful and will see you again here on our blog. Any hints, comments are welcome!

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• Cannot connect to MySQL over TCP locally - Connection Timeout - Ubuntu 9.04

  - by gav

  I am running Ubuntu and am ultimately trying to connect Tomcat to my MySQL database using JDBC. It has worked previously but after a reboot the instance now fails to connect. Both Tomcat 6 and MySQL 5.0.75 are on the same machine Connection string: jdbc:mysql:///localhost:3306 I can connect to MySQL on the command line using the mysql command The my.cnf file is pretty standard (Available on request) has bind address: 127.0.0.1 I cannot Telnet to the MySQL port despite netstat saying MySQL is listening I have one IpTables rule to forward 80 - 8080 and no firewall I'm aware of. I'm pretty new to this and I'm not sure what else to test. I don't know whether I should be looking in etc/interfaces and if I did what to look for. It's weird because it used to work but after a reboot it's down so I must have changed something.... :). I realise a timeout indicates the server is not responding and I assume it's because the request isn't actually getting through. I installed MySQL via apt-get and Tomcat manually. MySqld processes root@88:/var/log/mysql# ps -ef | grep mysqld root 21753 1 0 May27 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe mysql 21792 21753 0 May27 ? 00:00:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --port=3306 --socket=/var/run/mysqld/mysqld.sock root 21793 21753 0 May27 ? 00:00:00 logger -p daemon.err -t mysqld_safe -i -t mysqld root 21888 13676 0 11:23 pts/1 00:00:00 grep mysqld Netstat root@88:/var/log/mysql# netstat -lnp | grep mysql tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 21792/mysqld unix 2 [ ACC ] STREAM LISTENING 1926205077 21792/mysqld /var/run/mysqld/mysqld.sock Toy Connection Class root@88:~# cat TestConnect/TestConnection.java import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class TestConnection { public static void main(String args[]) throws Exception { Connection con = null; try { Class.forName("com.mysql.jdbc.Driver").newInstance(); System.out.println("Got driver"); con = DriverManager.getConnection( "jdbc:mysql:///localhost:3306", "uname", "pass"); System.out.println("Got connection"); if(!con.isClosed()) System.out.println("Successfully connected to " + "MySQL server using TCP/IP..."); } finally { if(con != null) con.close(); } } } Toy Connection Class Output Note: This is the same error I get from Tomcat. root@88:~/TestConnect# java -cp mysql-connector-java-5.1.12-bin.jar:. TestConnection Got driver Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 1 milliseconds ago. The driver has not received any packets from the server. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at com.mysql.jdbc.Util.handleNewInstance(Util.java:409) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1122) at TestConnection.main(TestConnection.java:14) Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at com.mysql.jdbc.Util.handleNewInstance(Util.java:409) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1122) at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:344) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2181) ... 12 more Caused by: java.net.ConnectException: Connection timed out at java.net.PlainSocketImpl.socketConnect(Native Method) ... 13 more Telnet Output root@88:~/TestConnect# telnet localhost 3306 Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection timed out

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• Failed to download repository information Check your Internet connection

  - by Luca Brazza

  I need to check if I have updates for Ubuntu. I think it is 11.05 As you can see this is what it says: Failed to download repository information Check your Internet connection. Details: W:Failed to fetch cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)/dists/precise/main/binary-amd64/Packages Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs , W:Failed to fetch cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)/dists/precise/restricted/binary-amd64/Packages Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs , W:Failed to fetch cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)/dists/precise/main/binary-i386/Packages Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs , W:Failed to fetch cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)/dists/precise/restricted/binary-i386/Packages Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs , W:Failed to fetch http://ppa.launchpad.net/ferramroberto/java/ubuntu/dists/precise/main/source/Sources 404 Not Found , W:Failed to fetch http://ppa.launchpad.net/ferramroberto/java/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found , E:Some index files failed to download. They have been ignored, or old ones used instead.

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• Sharing an internet connection through the Ethernet port

  - by Bob Cunningham

  I have a small living room PC (Bohica, running fully-updated Ubuntu 10.10/Maverick) connected to my HDTV that I use for web browsing and media streaming. It connects via WiFi (wlan0) to my Fedora server (Snafu) that in turn connects to the internet. I use static addressing, and everything has been working fine. I just got a Blu-ray player, and I'd like to give it wired network access to the internet via Bohica's available wired ethernet port (eth0). So far, I haven't been to get eth0 and the network configured to get the Blu-ray player talking to the internet. Here's my wlan0 configuration: ip4 addr: 192.168.0.100 mask: /24 (255.255.255.0) gateway: 192.168.0.4 (fedora box) The Blu-ray player is set to an IP of 192.168.0.98/24, with the same gateway as above. I want eth0 set to an IP of 192.168.0.99/24, but when I do this using nm-connection-editor I lose internet access (the system tries to use eth0 as the default internet access interface). How do I get my blu-ray player to talk to the internet through Bohica, and do so without disrupting my current (working) network? Thanks. Edit: Here's the relevant output from nm-tool with the Blu-ray player connected: $ nm-tool NetworkManager Tool State: connected - Device: eth0 Type: Wired Driver: forcedeth State: disconnected Default: no HW Address: 90:FB:A6:2C:94:32 Capabilities: Carrier Detect: yes Speed: 100 Mb/s Wired Properties Carrier: on - Device: wlan0 [wlan0] Type: 802.11 WiFi Driver: ndiswrapper State: connected Default: yes HW Address: 00:26:5A:C0:D0:05 IPv4 Settings: Address: 192.168.0.100 Prefix: 24 (255.255.255.0) Gateway: 192.168.0.4

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• New Oracle EM Book: "Oracle Enterprise Manager Grid Control Advanced OEM Techniques for the Real World" - First to include EM11g

  - by cristobal.soto(at)oracle.com

  The first book written about Enterprise Manager that covers the new Enterprise Manager Grid Control 11g which was released in April 2010 can be ordered now at a significant discount from http://www.rampant-books.com/book_1001_advanced_techniques_oem_grid_control.htmAbout the Author: Porus HavewalaPorus is a Senior Manager (Database Management) in the Enterprise Technology Program Office of Oracle Corporation based in Singapore. He has published numerous articles on Grid Control and RMAN on OTN, and created the world's first blog dedicated to Grid Control. Porus frequently speaks about Enterprise Manager at industry conferences and has created and executed an innovative program of seminars and workshops.

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• SQL connection to database repeating

  - by user175084

  ok now i am using the SQL database to get the values from different tables... so i make the connection and get the values like this: DataTable dt = new DataTable(); SqlConnection connection = new SqlConnection(); connection.ConnectionString = ConfigurationManager.ConnectionStrings["XYZConnectionString"].ConnectionString; connection.Open(); SqlCommand sqlCmd = new SqlCommand("SELECT * FROM Machines", connection); SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCmd); sqlCmd.Parameters.AddWithValue("@node", node); sqlDa.Fill(dt); connection.Close(); so this is one query on the page and i am calling many other queries on the page. So do i need to open and close the connection everytime...??? also if not this portion is common in all: DataTable dt = new DataTable(); SqlConnection connection = new SqlConnection(); connection.ConnectionString = ConfigurationManager.ConnectionStrings["XYZConnectionString"].ConnectionString; connection.Open(); can i like put it in one function and call it instead.. the code would look cleaner... i tried doing that but i get errors like: Connection does not exist in the current context. any suggestions??? thanks

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• Logging connection strings

  If you some of the dynamic features of SSIS such as package configurations or property expressions then sometimes trying to work out were your connections are pointing can be a bit confusing. You will work out in the end but it can be useful to explicitly log this information so that when things go wrong you can just review the logs. You may wish to develop this idea further and encapsulate such logging into a custom task, but for now lets keep it simple and use the Script Task. The Script Task code below will raise an Information event showing the name and connection string for a connection. Imports System Imports Microsoft.SqlServer.Dts.Runtime Public Class ScriptMain Public Sub Main() Dim fireAgain As Boolean ' Get the connection string, we need to know the name of the connection Dim connectionName As String = "My OLE-DB Connection" Dim connectionString As String = Dts.Connections(connectionName).ConnectionString ' Format the message and log it via an information event Dim message As String = String.Format("Connection ""{0}"" has a connection string of ""{1}"".", _ connectionName, connectionString) Dts.Events.FireInformation(0, "Information", message, Nothing, 0, fireAgain) Dts.TaskResult = Dts.Results.Success End Sub End Class Building on that example it is probably more flexible to log all connections in a package as shown in the next example. Imports System Imports Microsoft.SqlServer.Dts.Runtime Public Class ScriptMain Public Sub Main() Dim fireAgain As Boolean ' Loop through all connections in the package For Each connection As ConnectionManager In Dts.Connections ' Get the connection string and log it via an information event Dim message As String = String.Format("Connection ""{0}"" has a connection string of ""{1}"".", _ connection.Name, connection.ConnectionString) Dts.Events.FireInformation(0, "Information", message, Nothing, 0, fireAgain) Next Dts.TaskResult = Dts.Results.Success End Sub End Class By using the Information event it makes it readily available in the designer, for example the Visual Studio Output window (Ctrl+Alt+O) or the package designer Execution Results tab, and also allows you to readily control the logging by choosing which events to log in the normal way. Now before somebody starts commenting that this is a security risk, I would like to highlight good practice for building connection managers. Firstly the Password property, or any other similar sensitive property is always defined as write-only, and secondly the connection string property only uses the public properties to assemble the connection string value when requested. In other words the connection string will never contain the password. I have seen a couple of cases where this is not true, but that was just bad development by third-parties, you won’t find anything like that in the box from Microsoft.   Whilst writing this code it made me wish that there was a custom log entry that you could just turn on that did this for you, but alas connection managers do not even seem to support custom events. It did however remind me of a very useful event that is often overlooked and fits rather well alongside connection string logging, the Execute SQL Task’s custom ExecuteSQLExecutingQuery event. To quote the help reference Custom Messages for Logging - Provides information about the execution phases of the SQL statement. Log entries are written when the task acquires connection to the database, when the task starts to prepare the SQL statement, and after the execution of the SQL statement is completed. The log entry for the prepare phase includes the SQL statement that the task uses. It is the last part that is so useful, how often have you used an expression to derive a SQL statement and you want to log that to make sure the correct SQL is being returned? You need to turn it one, by default no custom log events are captured, but I’ll refer you to a walkthrough on setting up the logging for ExecuteSQLExecutingQuery by Jamie.

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• Logging connection strings

  If you some of the dynamic features of SSIS such as package configurations or property expressions then sometimes trying to work out were your connections are pointing can be a bit confusing. You will work out in the end but it can be useful to explicitly log this information so that when things go wrong you can just review the logs. You may wish to develop this idea further and encapsulate such logging into a custom task, but for now lets keep it simple and use the Script Task. The Script Task code below will raise an Information event showing the name and connection string for a connection. Imports System Imports Microsoft.SqlServer.Dts.Runtime Public Class ScriptMain Public Sub Main() Dim fireAgain As Boolean ' Get the connection string, we need to know the name of the connection Dim connectionName As String = "My OLE-DB Connection" Dim connectionString As String = Dts.Connections(connectionName).ConnectionString ' Format the message and log it via an information event Dim message As String = String.Format("Connection ""{0}"" has a connection string of ""{1}"".", _ connectionName, connectionString) Dts.Events.FireInformation(0, "Information", message, Nothing, 0, fireAgain) Dts.TaskResult = Dts.Results.Success End Sub End Class Building on that example it is probably more flexible to log all connections in a package as shown in the next example. Imports System Imports Microsoft.SqlServer.Dts.Runtime Public Class ScriptMain Public Sub Main() Dim fireAgain As Boolean ' Loop through all connections in the package For Each connection As ConnectionManager In Dts.Connections ' Get the connection string and log it via an information event Dim message As String = String.Format("Connection ""{0}"" has a connection string of ""{1}"".", _ connection.Name, connection.ConnectionString) Dts.Events.FireInformation(0, "Information", message, Nothing, 0, fireAgain) Next Dts.TaskResult = Dts.Results.Success End Sub End Class By using the Information event it makes it readily available in the designer, for example the Visual Studio Output window (Ctrl+Alt+O) or the package designer Execution Results tab, and also allows you to readily control the logging by choosing which events to log in the normal way. Now before somebody starts commenting that this is a security risk, I would like to highlight good practice for building connection managers. Firstly the Password property, or any other similar sensitive property is always defined as write-only, and secondly the connection string property only uses the public properties to assemble the connection string value when requested. In other words the connection string will never contain the password. I have seen a couple of cases where this is not true, but that was just bad development by third-parties, you won’t find anything like that in the box from Microsoft.   Whilst writing this code it made me wish that there was a custom log entry that you could just turn on that did this for you, but alas connection managers do not even seem to support custom events. It did however remind me of a very useful event that is often overlooked and fits rather well alongside connection string logging, the Execute SQL Task’s custom ExecuteSQLExecutingQuery event. To quote the help reference Custom Messages for Logging - Provides information about the execution phases of the SQL statement. Log entries are written when the task acquires connection to the database, when the task starts to prepare the SQL statement, and after the execution of the SQL statement is completed. The log entry for the prepare phase includes the SQL statement that the task uses. It is the last part that is so useful, how often have you used an expression to derive a SQL statement and you want to log that to make sure the correct SQL is being returned? You need to turn it one, by default no custom log events are captured, but I’ll refer you to a walkthrough on setting up the logging for ExecuteSQLExecutingQuery by Jamie.

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• Problem with hadoop start-dfs.sh

  - by user288501

  I installed and configured hadoop on my Ubuntu 14.04 server, virtualized inside of hyper-v, however I am getting an issue when i run start-dfs.sh root@sUbuntu01:/var/log# start-dfs.sh 14/06/04 15:27:08 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Starting namenodes on [OpenJDK 64-Bit Server VM warning: You have loaded library /usr/local/hadoop/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now. It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'. localhost] sed: -e expression #1, char 6: unknown option to `s' -c: Unknown cipher type 'cd' localhost: Ubuntu 14.04 LTS localhost: starting namenode, logging to /usr/local/hadoop/logs/hadoop-root-namenode-sUbuntu01.out noexecstack'.: ssh: Could not resolve hostname noexecstack'.: Name or service not known '-z: ssh: Could not resolve hostname '-z: Name or service not known 'execstack: ssh: Could not resolve hostname 'execstack: Name or service not known disabled: ssh: Could not resolve hostname disabled: Name or service not known with: ssh: Could not resolve hostname with: Name or service not known have: ssh: Could not resolve hostname have: Name or service not known VM: ssh: Could not resolve hostname vm: Name or service not known stack: ssh: Could not resolve hostname stack: Name or service not known guard: ssh: Could not resolve hostname guard: Name or service not known fix: ssh: Could not resolve hostname fix: Name or service not known VM: ssh: Could not resolve hostname vm: Name or service not known the: ssh: Could not resolve hostname the: Name or service not known to: ssh: Could not resolve hostname to: Name or service not known warning:: ssh: Could not resolve hostname warning:: Name or service not known it: ssh: Could not resolve hostname it: Name or service not known now.: ssh: Could not resolve hostname now.: Name or service not known library: ssh: Could not resolve hostname library: Name or service not known will: ssh: Could not resolve hostname will: Name or service not known link: ssh: Could not resolve hostname link: Name or service not known or: ssh: Could not resolve hostname or: Name or service not known It's: ssh: Could not resolve hostname it's: Name or service not known <libfile>',: ssh: Could not resolve hostname <libfile>',: Name or service not known which: ssh: connect to host which port 22: Connection timed out have: ssh: connect to host have port 22: Connection timed out you: ssh: connect to host you port 22: Connection timed out try: ssh: connect to host try port 22: Connection timed out the: ssh: connect to host the port 22: Connection timed out highly: ssh: connect to host highly port 22: Connection timed out might: ssh: connect to host might port 22: Connection timed out loaded: ssh: connect to host loaded port 22: Connection timed out You: ssh: connect to host you port 22: Connection timed out guard.: ssh: connect to host guard. port 22: Connection timed out library: ssh: connect to host library port 22: Connection timed out Server: ssh: connect to host server port 22: Connection timed out fix: ssh: connect to host fix port 22: Connection timed out The: ssh: connect to host the port 22: Connection timed out recommended: ssh: connect to host recommended port 22: Connection timed out that: ssh: connect to host that port 22: Connection timed out stack: ssh: connect to host stack port 22: Connection timed out OpenJDK: ssh: connect to host openjdk port 22: Connection timed out 64-Bit: ssh: connect to host 64-bit port 22: Connection timed out with: ssh: connect to host with port 22: Connection timed out localhost: Ubuntu 14.04 LTS localhost: starting datanode, logging to /usr/local/hadoop/logs/hadoop-root-datanode-sUbuntu01.out localhost: OpenJDK 64-Bit Server VM warning: You have loaded library /usr/local/hadoop/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now. localhost: It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'. Starting secondary namenodes [OpenJDK 64-Bit Server VM warning: You have loaded library /usr/local/hadoop/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now. It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'. 0.0.0.0] sed: -e expression #1, char 6: unknown option to `s' warning:: ssh: Could not resolve hostname warning:: Name or service not known -c: Unknown cipher type 'cd' It's: ssh: Could not resolve hostname it's: Name or service not known 'execstack: ssh: Could not resolve hostname 'execstack: Name or service not known '-z: ssh: Could not resolve hostname '-z: Name or service not known 0.0.0.0: Ubuntu 14.04 LTS 0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop/logs/hadoop-root-secondarynamenode-sUbuntu01.out 0.0.0.0: OpenJDK 64-Bit Server VM warning: You have loaded library /usr/local/hadoop/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now. 0.0.0.0: It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'. noexecstack'.: ssh: Could not resolve hostname noexecstack'.: Name or service not known <libfile>',: ssh: Could not resolve hostname <libfile>',: Name or service not known link: ssh: Could not resolve hostname link: No address associated with hostname it: ssh: Could not resolve hostname it: No address associated with hostname to: ssh: connect to host to port 22: Connection timed out or: ssh: connect to host or port 22: Connection timed out you: ssh: connect to host you port 22: Connection timed out guard.: ssh: connect to host guard. port 22: Connection timed out VM: ssh: connect to host vm port 22: Connection timed out stack: ssh: connect to host stack port 22: Connection timed out library: ssh: connect to host library port 22: Connection timed out Server: ssh: connect to host server port 22: Connection timed out might: ssh: connect to host might port 22: Connection timed out stack: ssh: connect to host stack port 22: Connection timed out You: ssh: connect to host you port 22: Connection timed out now.: ssh: connect to host now. port 22: Connection timed out disabled: ssh: connect to host disabled port 22: Connection timed out have: ssh: connect to host have port 22: Connection timed out will: ssh: connect to host will port 22: Connection timed out The: ssh: connect to host the port 22: Connection timed out have: ssh: connect to host have port 22: Connection timed out try: ssh: connect to host try port 22: Connection timed out the: ssh: connect to host the port 22: Connection timed out guard: ssh: connect to host guard port 22: Connection timed out the: ssh: connect to host the port 22: Connection timed out recommended: ssh: connect to host recommended port 22: Connection timed out with: ssh: connect to host with port 22: Connection timed out library: ssh: connect to host library port 22: Connection timed out 64-Bit: ssh: connect to host 64-bit port 22: Connection timed out fix: ssh: connect to host fix port 22: Connection timed out which: ssh: connect to host which port 22: Connection timed out VM: ssh: connect to host vm port 22: Connection timed out OpenJDK: ssh: connect to host openjdk port 22: Connection timed out fix: ssh: connect to host fix port 22: Connection timed out highly: ssh: connect to host highly port 22: Connection timed out that: ssh: connect to host that port 22: Connection timed out with: ssh: connect to host with port 22: Connection timed out loaded: ssh: connect to host loaded port 22: Connection timed out 14/06/04 15:36:02 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Any advice?

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• Can't login to Manager App in Tomcat 6.0.18

  - by Rafael Almeida

  Folks, I can't login to the manager app (localhost:8080/manager/html) in my Tomcat. More specifically, it asks for my username and password, and the ones supposed to be correct aren't accepted. Here's what I already checked: I tried editing my conf/tomcat-users.xml to add my user/role. Here's the current content of this file: <?xml version='1.0' encoding='utf-8'?> <tomcat-users> <role rolename="manager"/> <user username="tomcat" password="s3cret" roles="manager"/> </tomcat-users> I thought that maybe it wasn't looking up on this XML, but elsewhere. So, I came to know about Realms. The Realm part of my configuration is now: < Realm className="org.apache.catalina.realm.MemoryRealm" / ( please ignore the space before Realm, for some reason this site isn't accepting the literal tag ) What am I missing?

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• Share laptop's Wi-Fi with a LAN connection and a mobile device

  - by xperator

  OS: Windows 7 64bit I want to share my laptop's internet connection between my PC and my Android device. But I can only do one of them at a time. The laptop is connected to internet wirelessly. The PC is connected to the laptop using a Ethernet cable and internet is shared between them. I want to connect my mobile device to my laptop by making the laptop into a Wi-Fi hotspot. PC (Ethernet) == Laptop (connected to net by Wi-Fi) <== Mobile device (Wi-Fi hotspot) I have 3 connections in my laptop: Wireless Network Connection (internet - shared) Local area connection (PC) Wireless Network Connection 2 (Wi-Fi hotspot) Every time I have to disable either the LAN to get the Wi-Fi hotspot working, or disable the Wi-Fi hotspot to get LAN working. How can I share so I can use both at the same time?

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• Internet Connection Sharing, can't Share Wireless

  - by GuyNoir

  I'm using Windows XP, and I've been trying to setup my laptop so that I can connect to the internet connection that I get on the laptop through my mobile on an ad-hoc network. I've set up an ad-hoc network, but when I try to select "allow other users to connect through this computers internet connection", the only options I have are the Local Area Connections. The tutorial I've been using says that Wireless Connection should be in that pull down menu. Any help?

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• Oracle Launches Enterprise Manager Ops Center 12c at OpenWorld Japan

  - by Anand Akela

  Oracle Senior Vice President John Fowler and Oracle Vice President of Systems Management Steve Wilson unveiled Oracle Enterprise Manager Ops Center 12c at Oracle OpenWorld, Tokyo Japan on April 4th morning.  Oracle Enterprise Manager combines management of servers, operating systems, virtualization solution for x86 and SPRC servers, firmware, storage, and network fabrics with Oracle Enterprise Manager Ops Center. Available at no additional cost as part of the Ops Center Anywhere Program, Oracle Enterprise Manager Ops Center 12c allows enterprises to accelerate mission-critical cloud deployment, unleash the power of Solaris 11 — the first cloud OS, and simplify Oracle engineered systems management. Here are some of the resources for you to learn more about the new Oracle Enterprise Manager Ops Center 12c :  Press Release : Introducing Oracle Enterprise Manager Ops Center 12c White paper: Oracle Enterprise Manager Ops Center 12c - Making Infrastructure-as-a-Service in the Enterprise a Reality Oracle Enterprise Manager Ops Center web page at Oracle Technology Network Join Oracle Launch Webcast : Total Cloud Control for Systems on April 12th at 9 AM PST to learn more about  Oracle Enterprise Manager Ops Center 12c from Oracle Senior Vice President John Fowler, Oracle Vice President of Systems Management Steve Wilson and a panel of Oracle executive. Stay connected with  Oracle Enterprise Manager   :  Twitter | Facebook | YouTube | Linkedin | Newsletter

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• Internet Connection losing

  - by Mehdi Golchin

  When my internet connection is idle for a while about 5 mins, the connection will be lost. It merely happens when the connection is idle, not during download. I'm using an ADSL service by a HUAWEI smartAX MT882a ADSL modem. Any help will be appreciated

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• Oracle Access Manager 11gR1 BP04 Certified with EBS 12

  - by Elke Phelps (Oracle Development)

  I'm pleased to announce that the Oracle Access Manager team has certified Oracle Access Manager 11gR1 Bundle Patch 4 (a.k.a. 11.1.1.5.4 or BP04) with E-Business Suite Release 12.  Applying Oracle Access Manager 11gR1 BP04 will provide you with the latest set of fixes for Oracle Access Manager 11gR1 which have been validated with Oracle E-Business Suite Release 12. References Later Oracle Access Manager Bundle Patches may be applied on top of certified configurations. However, unless noted explicitly in Oracle E-Business Suite documentation, these later Bundle Patches have not been tested with Oracle E-Business Suite. These are considered to be uncertified configurations. The following documents have been updated to include record of the Oracle Access Manager 11gR1 BP04 certification with Oracle E-Business Suite Release 12: Integrating Oracle E-Business Suite with Oracle Access Manager 11g Using Oracle E-Business Suite AccessGate (Note 1309013.1) Migrating Oracle Single Sign-On 10gR3 to Oracle Access Manager 11g with Oracle E-Business Suite (Note 1304550.1) Related Articles Understanding Options for Integrating Oracle Access Manager with E-Business Suite Why Does E-Business Suite Integration with OAM Require Oracle Internet Directory? Oracle Access Manager 11.1.1.5 Certified with E-Business Suite Oracle Internet Directory 11.1.1.6 Certified with E-Business Suite In-Depth: Using Third-Party Identity Managers with E-Business Suite Release 12

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• Who is Configuration Manager?

  - by altern

  I would like to ask members of the community about the role of Configuration Manager, as you see it. I'm not asking what Configuration Management is, as long it had been asked before. What I need to know is: What tasks do you think Configuration Manager should perform (or performs) in your team? What is primary responsibility of Configuration Manager? What are secondary/auxiliary responsibilities of Configuration Manager? Does Configuration Manager need to be in charge of development processes on the project/company or he should be told what to do? What are relations between Configuration Manager, Build Manager, Release Manager, Deployment Engineer, CI Engineer roles? Aren't they all the same - Configuration Management? Maybe term Configuration Management is redundant and Technical/Team Lead should do all the related work instead? It would be really great if you could share your vision and experience.

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• Connection string during installation

  - by anon2009

  Hi, I've been convinced to use windows setup files(msi) for the installation of my new windows forms application after I asked a question here and got some excellent answers (thank you all): http://serverfault.com/questions/97039/net-application-deployment Now i have a different question: My application will need to access a SQL Server to provide users with data, which means that the connection string must be stored in the client's app.config file. How should I handle this? During installation, the user enters the connection string to that database? How they get the connection string? In an email from the admin? What if the admin wants to use SQL authentication and need to put the user info at the connection string? So you know, the app will be sold via the internet, so I don't have any access to the admins or the network. Any suggestions? Thanks in advanced.

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• Losing connection when watching flash videos

  - by Borror0

  Whenever I play a flash video on my browser (whichever I use, Chrome, Firefox or IE), there's a risk that I lose my Internet connection. I know it's limited to my computer only as my roommates are unaffected. I'm the only one that loses connection. Using Internet Explorer's diagnosis tool always repairs the connection, but it's annoying as hell. My OS is Windows XP, if that matters. Anyone knows what may be causing this and how to fix it?

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• X11 and Window Manager Confusion

  - by ell

  What roles do the Xorg server and a window manager, for example, metacity, play in displaying windows? Does the window manager communicate with the OS or Xorg? Does Xorg then use OpenGl to display things? Can someone explain what exactly the Xorg server does, and what exactly the window manager does, and the differences between the two. Also, if you could show me the Windows equivalent, that would be helpful. Thanks in advance, ell.

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• Remote Desktop fails after VPN connection

  - by Samet Sorgut

  The local computer (comp 1) is connected to a remote computer (comp 2) with Remote Desktop. On the remote computer (comp 2), I try to establish an VPN connection to a different remote computer (comp 3). Once I try to establish the VPN connection from the remote computer (comp 2) to the second remote computer (comp 3), Remote Desktop freezes on comp 1. It is not possible to connect to comp 2 again via Remote Desktop. What can be done to connect to this remote computer (comp 2) after it establishes a VPN connection? The only thing that comes to my mind is to install a second NIC and configure Remote Desktop to accept connection from this NIC while VPN is working from the other... What do you suggest? EDIT: I want to use the internet connection of the VPN, so all traffic should go over the VPN but still RDP working. My IP: 100.0.0.1 The IP where I'm connecting via RDP: 200.0.0.20 (Mask: 255.255.255.192, Gateway: 200.0.0.193) Where the 200.0.0.1 connects to VPN the IP of the VPN is: 65.254.61.250 Will routing like this help (Command is issued in 200.0.0.20, the RDP location): route ADD 65.254.61.250 MASK 255.255.255.192 200.0.0.193 Couldn't add gives the error: The route addition failed: The parameter is incorrect. I tried before connecting to VPN.

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• New sales kit for partners: Oracle Enterprise Manager 12c

  - by Javier Puerta

  Check out the latest Quick Reference Guides for Enterprise Manager 12c in the Knowledge Zone. The two-page Quick Reference Guide is designed to help partners uncover additional revenue opportunity by positioning Enterprise Manager in your sales engagement. Content includes elevator pitch for Enterprise Manager, tips on identifying target customers, qualifying questions to initiate customers discussion, supporting videos, references, and whitepapers for each customer scenario: Enterprise Manager 12c for Application Partners Enterprise Manager 12c for Hardware Partners Enterprise Manager 12c for Database Partners

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• Slow internet connection on Mac OS

  - by user984621

  At home, we have a router. From router goes the internet connection into the desktop PC (Windows 7) and Macbook Pro. The problem is, that on Mac OS is incredibly slow internet connection - is not possible to use the laptop for surfing on the internet. The same as for WiFi as for cable. On the PC with Windows 7 is working the internet connection properly. Is there any tool for testing, if on my Mac is a virus or just something, what slowing down the internet connection? THank you in advance.

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• New Sales Kit – Enterprise Manager 12c

  - by Cinzia Mascanzoni

  Check out the latest Quick Reference Guides for Enterprise Manager 12c in the Knowledge Zone. The two-page Quick Reference Guide is designed to help partners uncover additional revenue opportunity by positioning Enterprise Manager. Content includes elevator pitch for Enterprise Manager, tips on identifying target customers, qualifying questions to initiate customers discussion, supporting videos, references, and whitepapers for each customer scenario.• Enterprise Manager 12c for Application Partners • Enterprise Manager 12c for Hardware Partners• Enterprise Manager 12c for Database Partners

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• Network connection on Linux

  - by Kevin

  A general question about network connection on Linux : once a network connection goes into time_wait, is it still tied to the process ? Does it still use resources like say filehandle ? Reason I ask is because once it goes into time_wait, lsof does not report it anymore. I guess that means that the network connection is no longer tied to the process and hence does not count against filehandle limit. Would like to confirm though.

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• very slow connection to ssh server from client (but not other servers)

  - by AntonOfTheWoods

  I have an Ubuntu 12.04 laptop that is taking so long to connect to various servers (in different data centres) that it seems like a bit of a lottery whether I'll actually get a connection. If I connect to the servers between themselves it's instantaneous, and I've set UseDNS no AddressFamily inet On the servers I'm connecting to (and rebooted for good measure). I also put in the reverse DNS+IP of the cable connection I'm connecting from. If I connect from the laptop via telnet: telnet my.server 22 Then the connection is also instantaneous, so it doesn't appear to be a problem with an intervening firewall. I have the same behaviour whether I connect with the IP, a short name in my hosts or the FQDN. I'm connecting with a 50mbps (cable, sync) connection so that doesn't appear to be the problem, and when I do finally get a connection then it's a good, quick, stable one. I have tried listening on another port (8000) and that makes no difference. Web and other connections from the laptop to the machine are also very good. Does anyone have any ideas here?

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