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  • Hibernate @Transactional not starting transaction

    - by rhinds
    I have a web app using Hibernate, and I am attempting to persist some data, but it is failing to persist within a Transaction despite using the @Transactional annotation. My service class is as follows: @Service("profileService") public class ProfileService { private EntityManager entityManager; @Autowired private AccountService accountService; @Autowired private ProfileDAOImpl profileDao; @PersistenceContext public void setEntityManager(EntityManager em) { this.entityManager = em; } @Transactional public void addConnectionToAccount(SocialConnection sc) { entityManager.persist(sc); } } The addConnectionToAccount() method is being called from another Spring bean in a normal method, and the ProfileService class is currently being injected there: public class HibernateConnectionRepository implements ConnectionRepository { @Inject private ProfileService profileService; @Override @Transactional public void addConnection(SocialConnection sc) { try { profileService.addConnectionToAccount(accountId, sc); } catch (Exception e) { e.printStackTrace(); } } I tried putting the @Transactional annotation on the calling method in the vain hope that it might make a difference but nothing. Previously I have experienced problems like this its been because the object being persisted does not satisfy table restrictions (such as non-nullable columns as null) or because the method is being called from within the same class and the calling method is not Transactional, but neither of those are the case here.. Any ideas? it just fails silently, the logs are as follows: 2012-03-26 22:25:04,702 [http-bio-8085-exec-9] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@1bc25c8 [managed: 3, unused: 2, excluded: 0] (e.g. com.mchange.v2.c3p0.impl.NewPooledConnection@e5b006) 2012-03-26 22:25:04,710 [http-bio-8085-exec-9] DEBUG org.hibernate.SQL - select SEQ_COUNT from SEQUENCE where SEQ_NAME = 'PO_SEQ' for update 2012-03-26 22:25:04,711 [http-bio-8085-exec-9] DEBUG org.hibernate.SQL - update SEQUENCE set SEQ_COUNT = ? where SEQ_COUNT = ? and SEQ_NAME = 'PO_SEQ' 2012-03-26 22:25:04,723 [http-bio-8085-exec-9] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@1bc25c8 [managed: 3, unused: 2, excluded: 0] (e.g. com.mchange.v2.c3p0.impl.NewPooledConnection@e5b006) 2012-03-26 22:25:04,723 [http-bio-8085-exec-9] DEBUG org.hibernate.event.internal.AbstractSaveEventListener - Generated identifier: 2200, using strategy: org.hibernate.id.MultipleHiLoPerTableGenerator UPDATE Also wanted to mention that the HibernateConnectionRepository bean is not annotated and is actually being configured in an @Configuration class (if this makes any difference? not used @Configuration classes much). The method to create the bean is as follows: @Bean @Scope(value = "request", proxyMode = ScopedProxyMode.INTERFACES) public ConnectionRepository connectionRepository() { Authentication authentication = SecurityContextHolder.getContext().getAuthentication(); if (authentication == null) { throw new IllegalStateException("Unable to get a ConnectionRepository: no user signed in"); } ApplicationUser user = (ApplicationUser) authentication.getPrincipal(); return usersConnectionRepository().createConnectionRepository(String.valueOf(user.getAccountId())); } The bean is scoped to the logged in user, but may also be created multiple times for each user..

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  • Robust way to save/load objects with dependencies?

    - by mrteacup
    I'm writing an Android game in Java and I need a robust way to save and load application state quickly. The question seems to apply to most OO languages. To understand what I need to save: I'm using a Strategy pattern to control my game entities. The idea is I have a very general Entity class which e.g. stores the location of a bullet/player/enemy and I then attach a Behaviour class that tells the entity how to act: class Entiy { float x; float y; Behavior b; } abstract class Behavior { void update(Entity e); {} // Move about at a constant speed class MoveBehavior extends Behavior { float speed; void update ... } // Chase after another entity class ChaseBehavior extends Behavior { Entity target; void update ... } // Perform two behaviours in sequence class CombineBehavior extends Behavior { Behaviour a, b; void update ... } Essentially, Entity objects are easy to save but Behaviour objects can have a semi-complex graph of dependencies between other Entity objects and other Behaviour objects. I also have cases where a Behaviour object is shared between entities. I'm willing to change my design to make saving/loading state easier, but the above design works really well for structuring the game. Anyway, the options I've considered are: Use Java serialization. This is meant to be really slow in Android (I'll profile it sometime). I'm worried about robustness when changes are made between versions however. Use something like JSON or XML. I'm not sure how I would cope with storing the dependencies between objects however. Would I have to give each object a unique ID and then use these IDs on loading to link the right objects together? I thought I could e.g. change the ChaseBehaviour to store a ID to an entity, instead of a reference, that would be used to look up the Entity before performing the behaviour. I'd rather avoid having to write lots of loading/saving code myself as I find it really easy to make mistakes (e.g. forgetting to save something, reading things out in the wrong order). Can anyone give me any tips on good formats to save to or class designs that make saving state easier?

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  • Avoiding explicit recursion in Haskell

    - by Travis Brown
    The following simple function applies a given monadic function iteratively until it hits a Nothing, at which point it returns the last non-Nothing value. It does what I need, and I understand how it works. lastJustM :: (Monad m) => (a -> m (Maybe a)) -> a -> m a lastJustM g x = g x >>= maybe (return x) (lastJustM g) As part of my self-education in Haskell I'm trying to avoid explicit recursion (or at least understand how to) whenever I can. It seems like there should be a simple non-explicitly recursive solution in this case, but I'm having trouble figuring it out. I don't want something like a monadic version of takeWhile, since it could be expensive to collect all the pre-Nothing values, and I don't care about them anyway. I checked Hoogle for the signature and nothing shows up. The m (Maybe a) bit makes me think a monad transformer might be useful here, but I don't really have the intuitions I'd need to come up with the details (yet). It's probably either embarrassingly easy to do this or embarrassingly easy to see why it can't or shouldn't be done, but this wouldn't be the first time I've used self-embarrassment as a pedagogical strategy. Background: Here's a simplified working example for context: suppose we're interested in random walks in the unit square, but we only care about points of exit. We have the following step function: randomStep :: (Floating a, Ord a, Random a) => a -> (a, a) -> State StdGen (Maybe (a, a)) randomStep s (x, y) = do (a, gen') <- randomR (0, 2 * pi) <$> get put gen' let (x', y') = (x + s * cos a, y + s * sin a) if x' < 0 || x' > 1 || y' < 0 || y' > 1 then return Nothing else return $ Just (x', y') Something like evalState (lastJustM (randomStep 0.01) (0.5, 0.5)) <$> newStdGen will give us a new data point.

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  • Problem persisting inheritance tree

    - by alaiseca
    I have a problem trying to map an inheritance tree. A simplified version of my model is like this: @MappedSuperclass @Embeddable public class BaseEmbedded implements Serializable { @Column(name="BE_FIELD") private String beField; // Getters and setters follow } @MappedSuperclass @Embeddable public class DerivedEmbedded extends BaseEmbedded { @Column(name="DE_FIELD") private String deField; // Getters and setters follow } @MappedSuperclass public abstract class BaseClass implements Serializable { @Embedded protected BaseEmbedded embedded; public BaseClass() { this.embedded = new BaseEmbedded(); } // Getters and setters follow } @Entity @Table(name="MYTABLE") @Inheritance(strategy=InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name="TYPE", discriminatorType=DiscriminatorType.STRING) public class DerivedClass extends BaseClass { @Id @Column(name="ID", nullable=false) private Long id; @Column(name="TYPE", nullable=false, insertable=false, updatable=false) private String type; public DerivedClass() { this.embedded = new DerivedClass(); } // Getters and setters follow } @Entity @DiscriminatorValue("A") public class DerivedClassA extends DerivedClass { @Embeddable public static NestedClassA extends DerivedEmbedded { @Column(name="FIELD_CLASS_A") private String fieldClassA; } public DerivedClassA() { this.embedded = new NestedClassA(); } // Getters and setters follow } @Entity @DiscriminatorValue("B") public class DerivedClassB extends DerivedClass { @Embeddable public static NestedClassB extends DerivedEmbedded { @Column(name="FIELD_CLASS_B") private String fieldClassB; } public DerivedClassB() { this.embedded = new NestedClassB(); } // Getters and setters follow } At Java level, this model is working fine, and I believe is the appropriate one. My problem comes up when it's time to persist an object. At runtime, I can create an object which could be an instance of DerivedClass, DerivedClassA or DerivedClassB. As you can see, each one of the derived classes introduces a new field which only makes sense for that specific derived class. All the classes share the same physical table in the database. If I persist an object of type DerivedClass, I expect fields BE_FIELD, DE_FIELD, ID and TYPE to be persisted with their values and the remaining fields to be null. If I persist an object of type DerivedClass A, I expect those same fields plus the FIELD_CLASS_A field to be persisted with their values and field FIELD_CLASS_B to be null. Something equivalent for an object of type DerivedClassB. Since the @Embedded annotation is at the BaseClass only, Hibernate is only persisting the fields up to that level in the tree. I don't know how to tell Hibernate that I want to persist up to the appropriate level in the tree, depending on the actual type of the embedded property. I cannot have another @Embedded property in the subclasses since this would duplicate data that is already present in the superclass and would also break the Java model. I cannot declare the embedded property to be of a more specific type either, since it's only at runtime when the actual object is created and I don't have a single branch in the hierarchy. Is it possible to solve my problem? Or should I resignate myself to accept that there is no way to persist the Java model as it is? Any help will be greatly appreciated.

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  • jquery mouseent/leave to make div appears

    - by Blake
    I am looking to hover over my list item and have an effect similar to something like facebook chat is my best example..I am able to get the first div to appear but I believe this may be a selector issue because I cant get the rest working properly html <ul id="menu_seo" class="menu"> <li id="menu-seo"><span class="arrowout1"></span>SEO</li> <li id="menu-siteaudits"><span class="arrowout2"></span>Site Audits </li> <li id="menu-linkbuilding"><span class="arrowout3"></span>Link-Building</li> <li id="menu-localseo"><span class="arrowout4"></span>Local SEO</li> </ul> <div id="main_content"> <div id="menu-seo-desc"> <p>SEO management begins with a full website diagnosis of current web strategy Adjustments are made to improve your site’s ability to rank higher on search engines and draw more traffic </p> </div> <div id="menu-seo-desc2"> <p>Usability & site architecture review, Search Engine accessibility and indexing, Keyword research & targeting and Conversion rate optimization </p> </div> </div> css #menu-seo-desc { height:125px; width:210px; background-color:red; border-color:#CCC #E8E8E8 #E8E8E8 #CCC; border-style:solid; border-width:1.5px; border-radius:5px; box-shadow: 1px 0 2px 0px #888; -moz-box-shadow: 1px 0 2px 0px #888; -webkit-box-shadow: 1px 0 2px 1px #888; position:absolute; top:220px; left:350px; display:none; } js <script> $(document).ready(function(){ <script> $(document).ready(function(){ $('#menu_seo').on('#menu-seo', { 'mouseenter': function() { $('#menu-seo-desc').fadeIn(600); $('#menu-seo-desc2').fadeIn(600); }, 'mouseleave': function() { $('#menu-seo-desc').fadeOut(300); $('#menu-seo-desc2').fadeOut(300); } }); }); </script> });

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  • How can I map a String to a function in Java?

    - by Bears will eat you
    Currently, I have a bunch of Java classes that implement a Processor interface, meaning they all have a processRequest(String key) method. The idea is that each class has a few (say, <10) member Strings, and each of those maps to a method in that class via the processRequest method, like so: class FooProcessor implements Processor { String key1 = "abc"; String key2 = "def"; String key3 = "ghi"; // and so on... String processRequest(String key) { String toReturn = null; if (key1.equals(key)) toReturn = method1(); else if (key2.equals(key)) toReturn = method2(); else if (key3.equals(key)) toReturn = method3(); // and so on... return toReturn; } String method1() { // do stuff } String method2() { // do other stuff } String method3() { // do other other stuff } // and so on... } You get the idea. This was working fine for me, but now I need a runtime-accessible mapping from key to function; not every function actually returns a String (some return void) and I need to dynamically access the return type (using reflection) of each function in each class that there's a key for. I already have a manager that knows about all the keys, but not the mapping from key to function. My first instinct was to replace this mapping using if-else statements with a Map<String, Function>, like I could do in Javascript. But, Java doesn't support first-class functions so I'm out of luck there. I could probably dig up a third-party library that lets me work with first-class functions, but I haven't seen any yet, and I doubt that I need an entire new library. I also thought of putting these String keys into an array and using reflection to invoke the methods by name, but I see two downsides to this method: My keys would have to be named the same as the method - or be named in a particular, consistent way so that it's easy to map them to the method name. This seems WAY slower than the if-else statements I have right now. Efficiency is something of a concern because these methods will tend to get called pretty frequently, and I want to minimize unnecessary overhead. TL; DR: I'm looking for a clean, minimal-overhead way to map a String to some sort of a Function object that I can invoke and call (something like) getReturnType() on. I don't especially mind using a 3rd-party library if it really fits my needs. I also don't mind using reflection, though I would strongly prefer to avoid using reflection every single time I do a method lookup - maybe using some caching strategy that combines the Map with reflection. Thoughts on a good way to get what I want? Cheers!

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  • Handling Model Inheritance in ASP.NET MVC2

    - by enth
    I've gotten myself stuck on how to handle inheritance in my model when it comes to my controllers/views. Basic Model: public class Procedure : Entity { public Procedure() { } public int Id { get; set; } public DateTime ProcedureDate { get; set; } public ProcedureType Type { get; set; } } public ProcedureA : Procedure { public double VariableA { get; set; } public int VariableB { get; set; } public int Total { get; set; } } public ProcedureB : Procedure { public int Score { get; set; } } etc... many of different procedures eventually. So, I do things like list all the procedures: public class ProcedureController : Controller { public virtual ActionResult List() { IEnumerable<Procedure> procedures = _repository.GetAll(); return View(procedures); } } but now I'm kinda stuck. Basically, from the list page, I need to link to pages where the specific subclass details can be viewed/edited and I'm not sure what the best strategy is. I thought I could add an action on the ProcedureController that would conjure up the right subclass by dynamically figuring out what repository to use and loading the subclass to pass to the view. I had to store the class in the ProcedureType object. I had to create/implement a non-generic IRepository since I can't dynamically cast to a generic one. public virtual ActionResult Details(int procedureID) { Procedure procedure = _repository.GetById(procedureID, false); string className = procedure.Type.Class; Type type = Type.GetType(className, true); Type repositoryType = typeof (IRepository<>).MakeGenericType(type); var repository = (IRepository)DependencyRegistrar.Resolve(repositoryType); Entity procedure = repository.GetById(procedureID, false); return View(procedure); } I haven't even started sorting out how the view is going to determine which partial to load to display the subclass details. I'm wondering if this is a good approach? This makes determining the URL easy. It makes reusing the Procedure display code easy. Another approach is specific controllers for each subclass. It simplifies the controller code, but also means many simple controllers for the many procedure subclasses. Can work out the shared Procedure details with a partial view. How to get to construct the URL to get to the controller/action in the first place? Time to not think about it. Hopefully someone can show me the light. Thanks in advance.

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  • Configuring Jenkins for running with BitBucket

    - by Claus
    I'm trying to setup Jenkins on my mac mini in order to pull my iOS project source code from BitBucket and build it automatically. I've already gone through the major well know problems generating the ssh keys,uploading them in BitBucket,performing an ssh connection by console for adding the host to the well know list (you can find all my adventure here and here). Now,there are 3 user in my system: A,B and Shared. When I installed Jenkins it automatically placed itself in Shared, but I generated the ssh keys with the user A. So just to be clear In the A home directory there is an .ssh directory with public and private keys. When I try to run by Jenkins job I get this error message: Started by user anonymous Building in workspace /Users/Shared/Jenkins/Home/jobs/myprojectAdHocBuild/workspace Checkout:workspace / /Users/Shared/Jenkins/Home/jobs/myprojectAdHocBuild/workspace - hudson.remoting.LocalChannel@625cb0bb Using strategy: Default Cloning the remote Git repository Cloning repository [email protected]:myuser/myproject.git git --version git version 1.8.0 ERROR: Error cloning remote repo 'origin' : Could not clone [email protected]:myuser/myproject.git hudson.plugins.git.GitException: Could not clone [email protected]:myuser/myproject.git at hudson.plugins.git.GitAPI.clone(GitAPI.java:271) at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1036) at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:978) at hudson.FilePath.act(FilePath.java:851) at hudson.FilePath.act(FilePath.java:824) at hudson.plugins.git.GitSCM.determineRevisionToBuild(GitSCM.java:978) at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1134) at hudson.model.AbstractProject.checkout(AbstractProject.java:1325) at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:676) at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:88) at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:581) at hudson.model.Run.execute(Run.java:1516) at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46) at hudson.model.ResourceController.execute(ResourceController.java:88) at hudson.model.Executor.run(Executor.java:236) Caused by: hudson.plugins.git.GitException: Command "/usr/local/git/bin/git clone --progress -o origin [email protected]:myuser/myproject.git /Users/Shared/Jenkins/Home/jobs/myprojectAdHocBuild/workspace" returned status code 128: stdout: Cloning into '/Users/Shared/Jenkins/Home/jobs/myprojectAdHocBuild/workspace'... stderr: Host key verification failed. fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists. at hudson.plugins.git.GitAPI.launchCommandIn(GitAPI.java:885) at hudson.plugins.git.GitAPI.access$000(GitAPI.java:40) at hudson.plugins.git.GitAPI$1.invoke(GitAPI.java:267) at hudson.plugins.git.GitAPI$1.invoke(GitAPI.java:246) at hudson.FilePath.act(FilePath.java:851) at hudson.FilePath.act(FilePath.java:824) at hudson.plugins.git.GitAPI.clone(GitAPI.java:246) ... 14 more Trying next repository ERROR: Could not clone repository FATAL: Could not clone hudson.plugins.git.GitException: Could not clone at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1048) at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:978) at hudson.FilePath.act(FilePath.java:851) at hudson.FilePath.act(FilePath.java:824) at hudson.plugins.git.GitSCM.determineRevisionToBuild(GitSCM.java:978) at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1134) at hudson.model.AbstractProject.checkout(AbstractProject.java:1325) at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:676) at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:88) at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:581) at hudson.model.Run.execute(Run.java:1516) at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46) at hudson.model.ResourceController.execute(ResourceController.java:88) at hudson.model.Executor.run(Executor.java:236) As you can see it fails when Hudson try to run the GIT command. The odd things is that if I try to run /usr/local/git/bin/git clone --progress -o origin [email protected]:myuser/myproject.git /Users/Shared/Jenkins/Home/jobs/myprojectAdHocBuild/workspace In my console, it works fine (after fixing a small problem relative the folder write permission with chmod) I found a post reporting a similar error which names a number of possible options but I'm not sure how to perform correctly these operations on my console. It looks like Jenkins is trying to run a command with a user which doesn't have permission to retrieve the appropriate keys from my .ssh directory.Not really sure.Maybe this output can help: MacMini:~ myuser$ ps axu | grep "/jenkins" myuser 11660 0.0 4.6 2918124 97096 ?? S 6:59pm 1:05.63 /usr/bin/java -jar /Users/myuser/Library/Caches/org.jenkins-ci.jenkins/jenkins.war jenkins 9896 0.0 9.0 2939824 188552 ?? Ss 4:06pm 17:55.91 /usr/bin/java -jar /Applications/Jenkins/jenkins.war myuser 11930 0.0 0.0 2432768 588 s000 S+ 10:28am 0:00.00 grep /jenkins MacMini:~ myuser$ ps axu | grep tomcat myuser 11932 0.0 0.0 2432768 588 s000 S+ 10:28am 0:00.00 grep tomcat MacMini:~ myuser$ I really hope to fix this problem, because I would like to write a very detailed tutorial with all the information I found disseminated around the web.

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  • How to manipulate default document with rewrite module on IIS7?

    - by eugeneK
    Until few month ago i've been using IIS 6 where i could add different Default Documents to each websites which are physically same directory. Since II7 which adds Default Document value to web config i couldn't use such technique as web.config was changed for all the directory. So I've found simple solution with rewrite module to change Default Document for each domain <defaultDocument enabled="false" /> <rewrite> <rewriteMaps> <rewriteMap name="ResolveDefaultDocForHost"> <add key="site1.com" value="Default1.aspx" /> <add key="site2.com" value="Default2.aspx" /> </rewriteMap> </rewriteMaps> <rules> <rule name="DefaultDoc Redirect If No Trailing Slash" stopProcessing="true"> <match url=".*[^/]$" /> <conditions> <add input="{REQUEST_FILENAME}" matchType="IsDirectory" /> </conditions> <action type="Redirect" url="{R:0}/" /> </rule> <rule name="PerHostDefaultDocSlash" stopProcessing="true"> <match url="$|.*/$" /> <conditions> <add input="{REQUEST_FILENAME}" matchType="IsDirectory" /> <add input="{ResolveDefaultDocForHost:{HTTP_HOST}}" pattern="(.+)" /> </conditions> <action type="Rewrite" url="{R:0}{C:1}" appendQueryString="true" /> </rule> </rules> </rewrite> Now i've got two other issues. first of all i can't use canonical url rewrite, if i set one then site1.com and site2.com redirected to www.site1.com instead of having www. for each. second problem is that there is a directory within site1' and site2' physical directory called members in which Default.aspx is always a Default Document doesn't matter which domain name was used. It doesn't work as well. Please help me with this issue because i've never thought i will get such problem with supposed to be better IIS7...

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  • Some DHCP clients end up with wrong DNS server

    - by Nic Waller
    The scenario: DC running Windows Server 2008 R2 providing DNS + DHCP Cisco 1811 Router as the gateway 30 Windows XP DHCP clients on the LAN The problem: Some workstations are spontaneously switching to an incorrect DNS server. Specifically, ipconfig /all shows that they start using the gateway as a DNS server. This happens about 5-10 times a day to various computers, sometimes more than once per day. The workaround: Repairing the connection on the XP client always fixes the problem, and the correct DNS server address is obtained. We lost our main DNS/DHCP machine a week ago, and had to bring this one online as a spare. We've been having this issue since then. DHCP leases on the old and new servers are configured for "wired" (8 day) duration. There are definitely no other DHCP servers active on the LAN. So far there is no discernible pattern about which clients will show this problem, or when. When I ran DCDIAG /test:DNS it came back clean. Manual inspection of the DNS zone shows that all the records are appearing as expected, with no traces of the previous machine in there. Update Feb 27: Added screenshots. Here is a screenshot of the DHCP scope options on the 2008 R2 server. And here is a screenshot of ipconfig /all running on a healthy host. I don't have any ailing hosts at the moment, but will grab a screencap next time it happens. Update Feb 28: More screenshots. Here's a screenshot of DHCP and DNS traffic from a healthy client when repairing the local area connection. There's definitely only one server responding, but it does seem strange that the negotiation takes place twice. I'll try to get a similar capture from a sick machine this coming week. Update Mar 01: Caught a bad ipconfig. Here's a screenshot of ipconfig /all from a client that had this issue. It says the lease was issued this morning, but it doesn't even have an entry for the secondary DNS I set up yesterday. Both DNS servers were discovered properly when repairing the connection. Update Mar 01: It even got the sysadmin! This issue finally affected my personal workstation this morning. Unfortunately I had just rebooted and wasn't running a packet dump at the time. I set up a secondary server yesterday, and was logging all DNS traffic to it. My machine had not contacted the secondary DNS in over half an hour, so that says to me that it's just spontaneously reverting to the gateway without even failing over to secondary DNS first. Today I swapped the order of the DNS servers in DHCP, so the secondary is primary and vice versa. I will update again once I know how that goes.

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  • apache mod_cache in v2.2 - enable cache based on url

    - by Janning
    We are using apache2.2 as a front-end server with application servers as reverse proxies behind apache. We are using mod_cache for some images and enabled it like this: <IfModule mod_disk_cache.c> CacheEnable disk / CacheRoot /var/cache/apache2/mod_disk_cache CacheIgnoreCacheControl On CacheMaxFileSize 2500000 CacheIgnoreURLSessionIdentifiers jsessionid CacheIgnoreHeaders Set-Cookie </IfModule> The image urls vary completely and have no common start pattern, but they all end in ".png". Thats why we used the root in CacheEnable / If not served from the cache, the request is forwarded to an application server via reverse proxy. So far so good, cache is working fine. But I really only need to cache all image request ending in ".png". My above configuration still works as my application server send an appropriate Cache-Control: no-cache header on the way back to apache. So most pages send a no-cache header back and they get not cached at all. My ".png" responses doesn't send a Cache-Control header so apache is only going to cache all urls with ".png". Fine. But when a new request enters apache, apache does not know that only .png requests should be considered, so every request is checking a file on disk (recorded with strace -e trace=file -p pid): [pid 19063] open("/var/cache/apache2/mod_disk_cache/zK/q8/Kd/g6OIv@woJRC_ba_A.header", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) I don't want to have apache going to disk every request, as the majority of requests are not cached at all. And we have up to 10.000 request/s at peak time. Sometimes our read IO wait spikes. It is not getting really slow, but we try to tweak it for better performance. In apache 2.4 you can say: <LocationMatch .png$> CacheEnable disk </LocationMatch> This is not possible in 2.2 and as I see no backports for debian I am not going to upgrade. So I tried to tweak apache2.2 to follow my rules: <IfModule mod_disk_cache.c> SetEnvIf Request_URI "\.png$" image RequestHeader unset Cache-Control RequestHeader append Cache-Control no-cache env=!image CacheEnable disk / CacheRoot /var/cache/apache2/mod_disk_cache #CacheIgnoreCacheControl on CacheMaxFileSize 2500000 CacheIgnoreURLSessionIdentifiers jsessionid CacheIgnoreHeaders Set-Cookie </IfModule> The idea is to let apache decide to serve request from cache based on Cache-control header (CacheIgnoreCacheControl default to off). And before simply set a RequestHeader based on the request. If it is not an image request, set a Cache-control header, so it should bypass the cache at all. This does not work, I guess because of late processing of RequestHeader directive, see https://httpd.apache.org/docs/2.2/mod/mod_headers.html#early I can't add early processing as "early" keyword can't be used together with a conditional "env=!image" I can't change the url requesting the images and I know there are of course other solutions. But I am only interested in configuring apache2.2 to reach my goal. Does anybody has an idea how to achieve my goal?

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  • OS X Snow Leopard 10.6 Refuses to Load Websites the first time intermittently

    - by Brandon
    Many times when I am browsing the web, Snow Leopard will sit and load a site for 20 seconds or more, until it times out and says it cannot be displayed. If I refresh, it loads RIGHT away, every time. The issue is intermittent but happens from once every couple of days to a few times a day. So the long and short of it is this: Aluminum MacBook (Non-Pro) 2.4GHz Core2Duo, 4GB DDR3 I am using 10.6.6 but I have had this issue since 10.6.0 It happens in Firefox, Chrome, and Safari I have flushed my DNS (using the command 'blablabla flush') I am using custom DNS servers which I hoped would fix it but it had no effect* I am running Apache currently but haven't been for most of the time I've reformatted multiple times, always experiencing the issue I am on Cox cable internet, with a Motorola Surfboard & a Belkin F6D4230-4 v1 (Pre?) N wireless router. I've put the router in G only & N only & G+N to no effect It seems to be domain dependant as I can sometimes load the Google cache right away, and sometimes other sites will load but Google will refuse My Powerbook G4 with Leopard, other Windows XP laptops, & my wired Win7 desktop do not suffer from the issue. *I recently started using these to escape the awful Cox redirect page on timeouts I'm almost positive the issue has happened on other networks but I can't recall a specific instance (I have a terrible memory). The problem is intermittent and fixable enough (I just have to wait until it times out and hit refresh one time) but incredibly annoying since I'm constantly reading documentation from a large variety of sites. EDIT: To clarify, this happens with ALL sites, not only specific sites. I haven't been able to detect any pattern to the failures, but one day Google.com will refuse to load while reddit.com will, and the next day vice versa. Keep in mind that waiting for a timeout and hitting refresh loads the page right away, every time. If I don't wait for the timeout, opening more links, hitting refresh, and clicking the link a billion times have no effect. It seems to be domain neutral, affecting sites seemingly at random. It doesn't seem to have anything to do with connection inactivity either, because I will be SSHed into different servers, uploading files, browsing, downloading, etc, and it will just quit loading Jquery.com (for example) until I sit and wait for a timeout. /EDIT This is my last resort. Please, someone, tell me what is happening. Thank you.

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  • Using Upstart to manage Unicorn w/ rbenv + bundler binstubs w/ ruby-local-exec shebang

    - by codykrieger
    Alright, this is melting my brain. It might have something to do with the fact that I don't understand Upstart as well as I should. Sorry in advance for the long question. I'm trying to use Upstart to manage a Rails app's Unicorn master process. Here is my current /etc/init/app.conf: description "app" start on runlevel [2] stop on runlevel [016] console owner # expect daemon script APP_ROOT=/home/deploy/app PATH=/home/deploy/.rbenv/shims:/home/deploy/.rbenv/bin:$PATH $APP_ROOT/bin/unicorn -c $APP_ROOT/config/unicorn.rb -E production # >> /tmp/upstart.log 2>&1 end script # respawn That works just fine - the Unicorns start up great. What's not great is that the PID detected is not of the Unicorn master, it's of an sh process. That in and of itself isn't so bad, either - if I wasn't using the automagical Unicorn zero-downtime deployment strategy. Because shortly after I send -USR2 to my Unicorn master, a new master spawns up, and the old one dies...and so does the sh process. So Upstart thinks my job has died, and I can no longer restart it with restart or stop it with stop if I want. I've played around with the config file, trying to add -D to the Unicorn line (like this: $APP_ROOT/bin/unicorn -c $APP_ROOT/config/unicorn.rb -E production -D) to daemonize Unicorn, and I added the expect daemon line, but that didn't work either. I've tried expect fork as well. Various combinations of all of those things can cause start and stop to hang, and then Upstart gets really confused about the state of the job. Then I have to restart the machine to fix it. I think Upstart is having problems detecting when/if Unicorn is forking because I'm using rbenv + the ruby-local-exec shebang in my $APP_ROOT/bin/unicorn script. Here it is: #!/usr/bin/env ruby-local-exec # # This file was generated by Bundler. # # The application 'unicorn' is installed as part of a gem, and # this file is here to facilitate running it. # require 'pathname' ENV['BUNDLE_GEMFILE'] ||= File.expand_path("../../Gemfile", Pathname.new(__FILE__).realpath) require 'rubygems' require 'bundler/setup' load Gem.bin_path('unicorn', 'unicorn') Additionally, the ruby-local-exec script looks like this: #!/usr/bin/env bash # # `ruby-local-exec` is a drop-in replacement for the standard Ruby # shebang line: # # #!/usr/bin/env ruby-local-exec # # Use it for scripts inside a project with an `.rbenv-version` # file. When you run the scripts, they'll use the project-specified # Ruby version, regardless of what directory they're run from. Useful # for e.g. running project tasks in cron scripts without needing to # `cd` into the project first. set -e export RBENV_DIR="${1%/*}" exec ruby "$@" So there's an exec in there that I'm worried about. It fires up a Ruby process, which fires up Unicorn, which may or may not daemonize itself, which all happens from an sh process in the first place...which makes me seriously doubt the ability of Upstart to track all of this nonsense. Is what I'm trying to do even possible? From what I understand, the expect stanza in Upstart can only be told (via daemon or fork) to expect a maximum of two forks.

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  • Weird random application hang problem

    - by haridsv
    I am trying to understand an application hang problem that started up lately on my windows xp system. The system runs fine for days (sometimes) without ever shutting down or putting it to sleep, but the problem first shows up as one of the apps hanging. The application's UI stops responding or one or more background threads hang, so even though the GUI is responding, it is not doing anything (e.g., in VirtualDub's case, the UI responds fine, but the job doesn't progress and I won't even be able to abort it). The weirdness part comes from the fact that if I try to kill such an app, the program that is used to kill it goes into the same mode (i.e, that hangs instead of the original). E.g., if I use Process Explorer to kill it, the original program exits, but procexp now hangs. If I use another instance of procexp to kill the one that is hanging, this repeats, so there is always at least one program hanging in that state. This is not specific to procexp, I tried the native task manager and even the "End Process" dialog from windows explorer that shows up when you try to close a non-responsive GUI (in this case, the explorer itself hangs). The only program that didn't hang after the kill, is the command line taskkill. However, in this case, explorer hangs instead of taskkill. Also, once this problem starts manifesting, it soon ends up freezing the whole system to the extent that even a clean shutdown is not possible, so I have learned to reboot as soon as I notice this problem, however this is very inconvenient, as I often have encoding batch jobs going on which can't continue the job after the restart. The longer I leave the system running after seeing this problem, the more applications get into this state. I have tried to do a repair install but that didn't make any difference. I also uninstalled some of the newer installs, but again no difference. I tried to search online, but got inundating results for generic hang and crash related problems. Though I couldn't notice any pattern, it seems as though the problem is more frequent if I have some video encoding going on at that time. I had the system running for days when I only do browsing and internet audio/video chat before I decide to start encoding something and the problem starts to show up. I am not too sure if it is the encoding program that first hangs, though I almost always noticed that too hanging (like the VirtualDub stopping to make progress). I also had to reboot 3 times on one day when I was heavily experimenting with encoding. I would appreciate any help in narrowing down this problem and save me the trouble of reinstalling. I don't especially want to loose my gotd installs.

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  • Messages stuck in SMTP queue - Exchange 2003

    - by Diav
    I need your help people ;-) I have a problem with messages coming into our Exchange Server and ones going out through it. Basically, the messages are stuck in the SMTP queue. A message will come into the server, I can see it listed under "Exchange System Manager", but if you list the properties of the message queue it says something like 00:10 SMTP Message queued for local delivery 00:10 SMTP Message delivered locally to [email protected] 00:10 SMTP Message scheduled to retry local delivery 00:11 SMTP Message delivered locally to [email protected] 00:11 SMTP Message scheduled to retry local delivery etc etc For outgoing message list looks like this: 10:55 SMTP: Message Submitted to Advanced Queuing 10:55 SMTP: Started Message Submission to Advanced Queue 10:55 SMTP: Message Submitted to Categorizer 10:55 SMTP: Message Categorized and Queued for Routing 10:55 SMTP: Message Routed nad Queued for Remote Delivery And the end - since then status didn't change, message is in queue, I am forcing connection from time to time but without an effect. I checked connection with smarthost (used telnet for that) and everything seems to work correctly, so the problem is probably on exchange side. I am using Exchange Server 2003 running on Small Business Server 2003. I don't have any antivirus installed on server. Remaining free space on each partition is over 3Gb, on partition with data bases - it is over 12Gb. All was working good and without problems since 2005, problems started in half of this june - messages started going out and being stuck almost randomly (I don't see a pattern yet, some are going out, some are not, some are going after several hours). I don't know what to do, what to check more, so please, any ideas? Best regards, D. edit Priv1.edb has 14,5GB and priv1.stm 2,6GB - together those files have more than 16GB - can it be the reason? If yes, then what? Indeed, I haven't thought that it can have something in common with my problem, but several users reported recent problems with Outlook Web Access - they can log in, they see the list of their mails, but they can't see the content of their emails. Although when they are connecting with Outlook 2003/2007 - there is no such problem, only with OWA there is. edit2 So,.. It works now, and I have to admit that I am not really sure what the problem was (hope it won't come back). What have I done: Cleaned up some mailboxes to reduce size of them Dismounted Information Store Defragmentated data base files ( I used eseutil: c:\program files\exchsrvr\bin eseutil /d g:\data base\Exchsrvr\MDBDATA\priv1.edb ) Mounted Information Store back ..and before I managed to do anything else - my queue started moving, elements which were kept there already for days - started moving and after few minutes everything was sent, both, outside and locally. But: priv1.edb is still big (13 884 203 008), priv1.stm as well (2 447 384 576), so this is probably not the issue of size of the file. And if not this, so what was that? And if that was issue of size of the file, then soon it will repeat - is there something I can do to avoid it ?

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  • How to specify what network interface to use with TTCP or IPERF?

    - by Sammy
    The PC has two Gigabit Ethernet ports. They function as two separate network adapters. I'm trying to do a simple loopback test between the two. I've tried TTCP and IPERF. They're giving me hard time because I'm using the same physical PC. Using pcattcp... On the receiver end: C:\PCATTCP-0114>pcattcp -r PCAUSA Test TCP Utility V2.01.01.14 (IPv4/IPv6) IP Version : IPv4 Started TCP Receive Test 0... TCP Receive Test Local Host : GIGA ************** Listening...: On TCPv4 0.0.0.0:5001 Accept : TCPv4 0.0.0.0:5001 <- 10.1.1.1:33904 Buffer Size : 8192; Alignment: 16384/0 Receive Mode: Sinking (discarding) Data Statistics : TCPv4 0.0.0.0:5001 <- 10.1.1.1:33904 16777216 bytes in 0.076 real seconds = 215578.95 KB/sec +++ numCalls: 2052; msec/call: 0.038; calls/sec: 27000.000 C:\PCATTCP-0114> On the transmitter end: C:\PCATTCP-0114>PCATTCP.exe -t 10.1.1.1 PCAUSA Test TCP Utility V2.01.01.14 (IPv4/IPv6) IP Version : IPv4 Started TCP Transmit Test 0... TCP Transmit Test Transmit : TCPv4 0.0.0.0 -> 10.1.1.1:5001 Buffer Size : 8192; Alignment: 16384/0 TCP_NODELAY : DISABLED (0) Connect : Connected to 10.1.1.1:5001 Send Mode : Send Pattern; Number of Buffers: 2048 Statistics : TCPv4 0.0.0.0 -> 10.1.1.1:5001 16777216 bytes in 0.075 real seconds = 218453.33 KB/sec +++ numCalls: 2048; msec/call: 0.037; calls/sec: 27306.667 C:\PCATTCP-0114> It's responding alright. But why does it say 0.0.0.0? Is it passing through only one of the network adapters? I want 10.1.1.1 to be the server (receiver) and 10.1.1.2 to be the client (transmitter). These are the IP addresses assigned manually to each network adapter. How do I specify these addresses in TTCP? There is also the IPERF tool which has the -B option. Unfortunately I've been only able to use this option to bind the server to the 10.1.1.1 address. I was unable to bind the client to the 10.1.1.2 address. I might be doing it wrong. Can the -B option be used for both the server as well as the client side? What does the syntax look like for the client?

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  • How to make a 100% UNIQUE dvd? [closed]

    - by sajawikio
    Is it possible to make a DVD which would be next to impossible to replicate exactly even with special equipment? To be clear, not in the sense of making the data itself resistant to piracy - nothing like that. More like as an analogy to antiques - a reproduction of a furniture would be able to be spotted to a trained eye, that it is not the original. Is it possible to do this for a dvd? Like, say a dvd is copied, even by someone who is trying to use even special equipment and is hypothetically dying to copy the dvd exactly for whatever reason - even such copied dvd would be detectable that it is not exactly the original dvd somehow (as if it were a reproduction of an original antique, but not the original), and would be almost or even preferably impossible to actually copy 100% exact the dvd ever again. Just some ideas below on the sort of thing i might go about doing to do this, but really am not sure how or what programs, media, hardware, etc. would do the trick Not sure what would do the trick -- but for instance do there exist any blank dvd's that already come pre-recorded with some sort of serial number or bar code, or other metadata, or an encrypted hash, or something like that? Maybe any blank dvd will do but i should get a special software to extract hardcoded metadata? If so which software? Or special hardware even maybe? Such dvd which the "secret" can be: Well, to know what the "secret" is and if it is present on the disk, it probably should be readable by some software or maybe a particular hardware (i guess preferably only if some sort of key is known and input into the software, even better, only then such secret data on disk can be read, otherwise nothing shows up and it looks like just a regular disk with no secret on it), and Would be impossible to actually replicate, especially not with regular burning hardware and preferably not at all. Other idea: Is there any special software that can direct the write head of laser to physically "mar" the dvd in such a way that, when played in dvd player, makes a particular visual pattern or something like that, also say the mar itself shows up as faint scratch on disk, but would be impossible for someone to do themselves exactly? EDIT: Also to clarify suppose the dvd contains video and music that should be playable on dvd players, maybe a menu too (i.e not a dvd containing software), and also to clarify the question is about how to make dvd 100% unique, not how to make the actual content of dvd protected from "piracy".

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  • How to move a ruby on rails application to a new server

    - by ManiacZX
    I have a rails app on an old Ubuntu server I need to move onto a new machine. I haven't worked with ruby on rails so I don't really know anything about the structure of the app. I want to load this onto an Ubuntu 8.04 AMI on Amazon EC2 and am looking for any information regarding the migration process such as: Do I copy over the entire folder defined as the application root in the mongrel config (for ex: /u/apps/myapp/current) or just certain folders? Am I looking for trouble if I go with the latest versions of ruby and the various gems? Any general gotchas to look out for in the process. Current server information: root@webnode001:/# cat /proc/version Linux version 2.6.15-27-server (buildd@terranova) (gcc version 4.0.3 (Ubuntu 4.0.3-1ubuntu5)) #1 SMP Fri Dec 8 18:43:54 UTC 2006 root@webnode001:/# rails -v Rails 1.2.3 root@webnode001:/# mongrel_rails cluster::configure --version Version 1.0.1 root@webnode001:/# gem -v 0.9.0 root@webnode001:/# gem list -l *** LOCAL GEMS *** actionmailer (1.3.3, 1.2.5) Service layer for easy email delivery and testing. actionpack (1.13.3, 1.12.5) Web-flow and rendering framework putting the VC in MVC. actionwebservice (1.2.3, 1.1.6) Web service support for Action Pack. activerecord (1.15.3, 1.15.2, 1.14.4) Implements the ActiveRecord pattern for ORM. activesupport (1.4.2, 1.4.1, 1.3.1) Support and utility classes used by the Rails framework. cgi_multipart_eof_fix (2.1) Fix an exploitable bug in CGI multipart parsing which affects Ruby <= 1.8.5 when multipart boundary attribute contains a non-halting regular expression string. daemons (1.0.7, 1.0.5, 1.0.4, 1.0.2) A toolkit to create and control daemons in different ways eventmachine (0.7.2, 0.7.0) Ruby/EventMachine socket engine library fastercsv (1.2.0, 1.1.0) FasterCSV is CSV, but faster, smaller, and cleaner. fastthread (1.0) Optimized replacement for thread.rb primitives ferret (0.11.4) Ruby indexing library. gem_plugin (0.2.2, 0.2.1) A plugin system based only on rubygems that uses dependencies only mongrel (1.0.1, 0.3.13.4) A small fast HTTP library and server that runs Rails, Camping, Nitro and Iowa apps. mongrel_cluster (0.2.1) Mongrel plugin that provides commands and Capistrano tasks for managing multiple Mongrel processes. mysql (2.7) MySQL/Ruby provides the same functions for Ruby programs that the MySQL C API provides for C programs. piston (1.3.3) Piston is a utility that enables merge tracking of remote repositories. rails (1.2.3, 1.1.6) Web-application framework with template engine, control-flow layer, and ORM. rake (0.7.3, 0.7.1) Ruby based make-like utility. sources (0.0.1) This package provides download sources for remote gem installation swiftiply (0.5.1) A fast clustering proxy for web applications.

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  • Squid Proxy: url_regex acl is not working?

    - by bharathi
    I am using squid proxy 3.1 in ubuntu machine. I want to allow only urls matching our pattern through our proxy server. I configured acl like below. Acl for dstdomain is working fine. If i access any url besides .zmedia.com , I got proxy connection refused. But the url_regex is not working. What i am trying here is. Allow only request from ".zmedia.com" domain and the request url should be in "/blog" context. # # Recommended minimum configuration: # acl manager proto cache_object acl localhost src 127.0.0.1/32 ::1 acl to_localhost dst 127.0.0.0/8 ::1 acl urlwhitelist url_regex -i ^http(s)://([a-zA-Z]+).zmedia.com/blog/.*$ acl allowdomain dstdomain .zmedia.com acl Safe_ports port 80 8080 8500 7272 # Example rule allowing access from your local networks. # Adapt to list your (internal) IP networks from where browsing # should be allowed acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl SSL_ports port 7272 # multiling http acl CONNECT method CONNECT # # Recommended minimum Access Permission configuration: # # Only allow cachemgr access from localhost http_access allow manager localhost http_access deny manager http_access deny !allowdomain http_access allow urlwhitelist http_access allow CONNECT SSL_ports http_access deny CONNECT !SSL_ports # Deny requests to certain unsafe ports http_access deny !Safe_ports # Deny CONNECT to other than secure SSL ports http_access deny CONNECT !SSL_ports # We strongly recommend the following be uncommented to protect innocent # web applications running on the proxy server who think the only # one who can access services on "localhost" is a local user #http_access deny to_localhost # # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS # # Example rule allowing access from your local networks. # Adapt localnet in the ACL section to list your (internal) IP networks # from where browsing should be allowed http_access allow localhost # And finally deny all other access to this proxy http_access deny all # Squid normally listens to port 3128 http_port 3128 # We recommend you to use at least the following line. hierarchy_stoplist cgi-bin ? # Uncomment and adjust the following to add a disk cache directory. #cache_dir ufs /var/spool/squid 100 16 256 # Leave coredumps in the first cache dir coredump_dir /var/spool/squid append_domain .zmedia.com # Add any of your own refresh_pattern entries above these. refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 Please correct me , If i did anything wrong?

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  • Apache and MySQL taking all the memory? Maximum connections?

    - by lpfavreau
    I've a had one of our servers going down (network wise) but keeping its uptime (so looks the server is not losing its power) recently. I've asked my hosting company to investigate and I've been told, after investigation, that Apache and MySQL were at all time using 80% of the memory and peaking at 95% and that I might be needing to add some more RAM to the server. One of their justifications to adding more RAM was that I was using the default max connections setting (125 for MySQL and 150 for Apache) and that for handling those 150 simultaneous connections, I would need at least 3Gb of memory instead of the 1Gb I have at the moment. Now, I understand that tweaking the max connections might be better than me leaving the default setting although I didn't feel it was a concern at the moment, having had servers with the same configuration handle more traffic than the current 1 or 2 visitors before the lunch, telling myself I'd tweak it depending on the visits pattern later. I've also always known Apache was more memory hungry under default settings than its competitor such as nginx and lighttpd. Nonetheless, looking at the stats of my machine, I'm trying to see how my hosting company got those numbers. I'm getting: # free -m total used free shared buffers cached Mem: 1000 944 56 0 148 725 -/+ buffers/cache: 71 929 Swap: 1953 0 1953 Which I guess means that yes, the server is reserving around 95% of its memory at the moment but I also thought it meant that only 71 out of the 1000 total were really used by the applications at the moment looking a the buffers/cache row. Also I don't see any swapping: # vmstat 60 procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0 57612 151704 742596 0 0 1 1 3 11 0 0 100 0 0 0 0 57604 151704 742596 0 0 0 1 1 24 0 0 100 0 0 0 0 57604 151704 742596 0 0 0 2 1 18 0 0 100 0 0 0 0 57604 151704 742596 0 0 0 0 1 13 0 0 100 0 And finally, while requesting a page: top - 08:33:19 up 3 days, 13:11, 2 users, load average: 0.06, 0.02, 0.00 Tasks: 81 total, 1 running, 80 sleeping, 0 stopped, 0 zombie Cpu(s): 1.3%us, 0.3%sy, 0.0%ni, 98.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1024616k total, 976744k used, 47872k free, 151716k buffers Swap: 2000052k total, 0k used, 2000052k free, 742596k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 24914 www-data 20 0 26296 8640 3724 S 2 0.8 0:00.06 apache2 23785 mysql 20 0 125m 18m 5268 S 1 1.9 0:04.54 mysqld 24491 www-data 20 0 25828 7488 3180 S 1 0.7 0:00.02 apache2 1 root 20 0 2844 1688 544 S 0 0.2 0:01.30 init ... So, I'd like to know, experts of serverfault: Do I really need more RAM at the moment? How do they calculate that for 150 simultaneous connections I'd need 3Gb? Thanks for your help!

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  • COPSSH RSA only authentication connection problem

    - by Siriss
    Hello all- I am trying to setup an RSA Authentication only SSH/SFTP server. The SSH will be used primarily for RDC. Everything works just fine if I use password authentication. I am using Putty Key Generator to create he keys and I have pasted the key into authorized_keys file and restarted the OpenSSH server. I am using FileZilla to test the SFTP connection as that is the most important. For my tests I have created the keys without password correction. It will not work with a standard SSH connection either. It says "Server refused our key". I have recreated the key twice double checking with a guide on google, and I am pretty sure I did it correctly. I load the key file into FileZilla under settings/SFTP and try to connect and I get the following error: Disconnected: No supported authentication methods available. I have been playing with the different settings all night and I cannot figure it out. Here is my sshd_config file: # $OpenBSD: sshd_config,v 1.80 2008/07/02 02:24:18 djm Exp $ # This is the sshd server system-wide configuration file. See # sshd_config(5) for more information. # This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin # The strategy used for options in the default sshd_config shipped with # OpenSSH is to specify options with their default value where # possible, but leave them commented. Uncommented options change a # default value. #Port 22 #AddressFamily any #ListenAddress 0.0.0.0 #ListenAddress :: # Disable legacy (protocol version 1) support in the server for new # installations. In future the default will change to require explicit # activation of protocol 1 Protocol 2 # HostKey for protocol version 1 #HostKey /etc/ssh/ssh_host_key # HostKeys for protocol version 2 #HostKey /etc/ssh/ssh_host_rsa_key #HostKey /etc/ssh/ssh_host_dsa_key # Lifetime and size of ephemeral version 1 server key #KeyRegenerationInterval 1h #ServerKeyBits 1024 # Logging # obsoletes QuietMode and FascistLogging #SyslogFacility AUTH #LogLevel INFO # Authentication: #LoginGraceTime 2m PermitRootLogin no #StrictModes yes #MaxAuthTries 6 #MaxSessions 10 RSAAuthentication yes PubkeyAuthentication yes AuthorizedKeysFile .ssh/authorized_keys # For this to work you will also need host keys in /etc/ssh/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 #HostbasedAuthentication no # Change to yes if you don't trust ~/.ssh/known_hosts for # RhostsRSAAuthentication and HostbasedAuthentication #IgnoreUserKnownHosts no # Don't read the user's ~/.rhosts and ~/.shosts files #IgnoreRhosts yes # To disable tunneled clear text passwords, change to no here! PasswordAuthentication no PermitEmptyPasswords no # Change to no to disable s/key passwords #ChallengeResponseAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes #KerberosGetAFSToken no # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. UsePAM no #AllowAgentForwarding yes #AllowTcpForwarding yes #GatewayPorts no #X11Forwarding no #X11DisplayOffset 10 #X11UseLocalhost yes #PrintMotd yes #PrintLastLog yes #TCPKeepAlive yes UseLogin no #UsePrivilegeSeparation yes #PermitUserEnvironment no #Compression delayed #ClientAliveInterval 0 #ClientAliveCountMax 3 #UseDNS yes #PidFile /var/run/sshd.pid #MaxStartups 10 #PermitTunnel no #ChrootDirectory none # no default banner path #Banner none # override default of no subsystems Subsystem sftp /bin/sftp-server # Example of overriding settings on a per-user basis #Match User anoncvs # X11Forwarding no # AllowTcpForwarding no # ForceCommand cvs server Thank you so much for your help!

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  • Intermittent Disconnection of Client Computers from Domain Server

    - by dilip nagle
    The Background: I have Windows 2008 server Enterprise Version with 25 user cal licences. It has a domain and all users and a network shared HP printer in it. The Server has two network cards and both these cards as well as all client machines are on IP addressing scheme of 192.168.1.* with subnetmask 255.255.255.0. Of the two network cards viz. 192.168.1.231 and 192.168.1.233, only 192.168.1.231 is registered with DNS. In 192.168.1.233(i.e. 2nd network card) has default getway as 192.168.1.231 and dns address as 192.168.1.231. The Server has three hard disks with capacities as 500gb, 500gb and 1TB and are partitioned as (C,D,E), (F,G) and (K) with partition K having all user data into various Shared Folders. Each of these folders(On Partition K), are mapped onto each user's computer as per the right of access given to them. The Problem: The Server was installed about 6 months ago and till date not even once, the Server has Hung or has given any problem. All the Clients computers are able to run the web based software from their computers via ip address, e.g. http://192.168.1.231/webERP/default.aspx. However, occassionally, when any client computer tries to browse network mappings, it hangs. Again, there is no fixed pattern. This may happen after running smoothly for say 3 days. On each Client's machine, the network settings are as follows: IP Address: 192.168.1.* where * is 1,2,3 .... Sunnetmask: 255.255.255.0 defauly getway: 192.168.1.231 Which is a server card and DNS address. preferred DNS Server: 192.168.1.231 In Advanced Tab under Wins: LMHostLookup is Unticked and default is radio buttoned. Ideally, I would have loved to have Disabled NETBIOS over TCP/IP but some network printers do not get accessed if this option is enabled(ie. Radio Buttoned). Bacause Disabling Netbios will drastically reduce traffic of NETBIOS broadcasting to all the computers on the net to do naming resolution. On Server, I have WINs Running which I have Scavanged Records, verified Database Integrity etc, removed Tombstoned Records etc. The Critical Errors shown only once a day when the server is statred are 4224(WINS) and 12923 - Server Licencing failed to Update DNS Record. I fail to understand as why do client machines HANG when they try to browse mapped network shared folders on K Drive. Kindly Advice

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  • moving raid 10 to another identical server both on Smart Array 6i controllers

    - by SalimQrdl
    I have dead HP DL 380G4 with RAID 1+0 with 1 logical volume from 4x72GB drives on built-in Smart Array 6i 128Mb BBWC. It was shut down properly. It seems it was usual death for Proliant with ILO led 2,3,8 lighting. I want to move array to another identical server with same raid firmware level. What is the best strategy?: I have RAID 1+0 on bay 0 bay 1 bay 2 bay 3 As I understand bay0+bay1 are in RAID 1 , bay2+bay3 are in RAID 1, and both RAID 1 pairs are in RAID 0. So should I : Clear RAID config on new server, insert bay 0, bay 2 and power-on or Create RAID 1+0 with 1 logical volume from clear HDDs , and then poweroff ,remove HDDs and insert 2 HDDs(bay 0, bay 2) from old RAID 1+0. then power-on. (each hdd has its raid position info stored but may be could work on same config) According to documentation for Smart Array 6i it could be possible to migrate. however one requirement point is unclear for me Before you move drives, the following conditions must be met: • The array is in its original configuration. " What is orginal and non-original config for RAID 1+0? Another point "If you want to move an array to another controller, you must also consider the following additional limitations: • All drives in the array must be moved at the same time." I want to move one hdd from each RAID 1 pair. to have mirrors untouched just in case. Do they mean to move all 4 simultaniously? Smart Array 6i User Guide: Moving Drives and Arrays You can move drives to other ID positionson the same array controller. You can also move a complete arrayfrom one controller to another, even if the controllers are on different servers. Before you move drives, the following conditions must be met: • If moving thedrives to a different server, the new server must have enough empty bays to accommodate all the drives simultaneously. • The move will not result in more than 14 physical drives per controller channel. • No controller will be configured with more than 32 logical volumes. • The array has no failed or missing drives. • The array is in its original configuration. • The controller is not reading from or writing to any of the spare drives in the array. • The controller is not running capacity expansion, capacity extension, or RAID or stripe size migration. • The controller is using the latestfirmware version (recommended). If you want to move an array to another controller, you must also consider the following additional limitations: • All drives in the array must be moved at the same time. • In most cases, a moved array (and the logical drives that it contains) can still undergo arraycapacity expansion, logical drive capacity extension, or migration of RAID level orstripe size. When all the conditions have been met: Back up all data before removing any drives or changing configuration. This step is requiredif you are moving data-containing drives from a controller that does not have a battery-backed cache. Power down the system. If you are moving an array from a controller that contains a RAID ADG logical volume to a controller that does not support RAID ADG: Move the drives. Power up the system. If a 1724 POST message is displayed, drive positions were changed successfully and the configuration was updated. If a 1785 (NotConfigured)POST message is displayed: a. Power down the system immediately to prevent data loss. b. Return the drives to their original locations. c. Restore the data from backup, if necessary. Check the new drive configuration byrunning ORCA or ACU ("Configuring an Array" on page 9).

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  • Outlook refuses to connect to Exchange

    - by wfaulk
    Outlook 2007 under Windows XP connecting to Exchange 2003 SP2: when started, it flips back and forth between "Connecting to Exchange Server" and "Disconnected" three or four times, then gives up and stays disconnected. I tried deleting the ost file (which was nearly 2GB), turning Cached mode on and off, recreating the account inside the Mail control panel, changing the account to use HTTP, and probably some other things. None of it seemed to make any difference, until … After fiddling with it for a while, I got this absurd error message dialog at startup, and it exits after I click OK: Cannot start Microsoft Office Outlook. Cannot open the Outlook window. The set of folders cannot be opened. Microsoft Exchange is not available. Either there are network problems or the Exchange server is down for maintenance. (I'm not sure if I can even trust that message. It's so long, it just feels like a random offset into Outlook's stack of error messages.) Either way, the Exchange server is available to everyone else, and is available via OWA from that computer. I ran Process Explorer against Outlook and it showed 5 or so ESTABLISHED connections to our Exchange server, plus listening on two UDP ports, and two CLOSE_WAIT connections to localhost. If I managed to look at Outlook's IP connections while it was doing its Connecting/Disconnected dance, it had a huge number of connections open to the Exchange server. It more than filled ProcExp's dialog box; I'm guessing at least 20, probably more. The only other odd thing is that our network admin at some point added a wildcard DNS record to the domain name that we use for email, and now Outlook will sometimes (always?) start by complaining about autodiscover.example.com's SSL certificate. There is a web server there, but it doesn't have any sort of email autodiscover anything on it. It doesn't make any difference if I click "OK" or "Cancel" (or whatever the buttons are). I also added a bogus entry for the hostname to Windows' hosts file, pointing it at 127.0.0.2, and it stopped complaining about the certificate. (The CLOSE_WAIT sockets above were from before I made this change, and went away after.) I don't think this is related, as the same problem should exist for everyone, but it might be. This is the second time this user has had this problem. The first time, I never found a solution other than reinstalling Outlook. Now that it's a pattern, I'd like to find a permanent solution, rather than assume it's a random glitch.

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  • Choice and setup of version control

    - by Peter M
    I am about to set up an new laptop and in the process transition to a new version control system as part of a general cleanup. Currently I use a centralized version control system (yes it is VSS, and yes I know all the pro's and con's of that system, but as a single user system it works well for me). I have very little requirements for a new system and I am free to choose among any of the current mainstream players, but cost constraints will push me towards oss. Some of my requirements are: Runs on a single machine (ie the laptop in question) under windows I am not sharing things with other developers or workers - this is more for my own historical benefits. I want to version source code, documentation and binary files I have a large hierarchy of projects that are unrelated (see below) I have files within the hierarchy that don't need to be controlled (but could be) Some projects use Visual Studio, so some integration there could be nice. There could be some sharing of files between jobs. I generally only need a small about of branching in code files The directory hierarchy that I have at the moment is somewhat like: Root | |--Customer #1 | | | |--Job #1 | | | | | |--Data files received from Customer for Job (not controlled) | | |--Documentation files (controlled) | | |--Project information files (not controlled - but could be) | | |--Software Project Files (controlled) | | |--Scratch dir for job (not controlled) | | | |--Job #2 | | (same structure as above) | |--Customer #2 | |.. | |--Cusmtomer #n |.. Currently I have about 22 customers with differing numbers of projects underneath them. At the moment I have a single VSS repository based at the root of the directory structure. If I kept with a centralized system (ie SVN) I believe that I should keep the same approach and continue with a single repository based from the root dir. Is this a valid approach? However if I move to a distributed tool then I am unsure of how I should handle the situation. My initial guess is that I should not have a repository based on the root of my entire directory structure - but that is a guess so I really don't know how valid it is. Should I pitch a distributed approach at the Root, Customer, Job or sub-Job directory level? Also what I am not clear on with distributed tools (and perhaps with SVN as well), is if I can branch parts of a repository. For example, I can see branching source code in software projects as being useful, but branching my documentation as not being useful. So if I pitch a repository at the Job level, can I just branch the Software Project Files? Or would all files in that Job be branched? Every time I look at distributed tools I get a nagging feeling that they are not suited to my style of setup. I am uncomfortable with idea of having to manually set up something like 50 to 80 separate repositories (if I pitch at the Job level, or 20+ if at the Customer level) within my directory hierarchy. This feeling also extends to having all those repositories scattered around as well - however I do have a backup strategy that I trust, so this latter feeling is pretty well unfounded. So what advice can you all give me? Thanks in advance!

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