[jboss-user] [EJB 3.0 Development] - Possible Deadlock Jboss 4.2.3

[Daniel Cullender]

Daniel Cullender [http://community.jboss.org/people/cullendw] created the discussion

"Possible Deadlock Jboss 4.2.3"

To view the discussion, visit: http://community.jboss.org/message/541800#541800

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Hi,

We have been running jboss 4.2.3 for a while now. Recently we have been getting deadlocks and we are battling to narrow down the exact cause. This happens randomly and can take hours to occur. When doing a stack trace, we find the following culprits : 


*Thread: WorkManager(2)-38* : priority:5, demon:true, threadId:479, threadState:BLOCKED, lockName:java.lang.Class at 741b31f2
> java.lang.Class.initAnnotationsIfNecessary(Class.java:3067)
> java.lang.Class.getAnnotation(Class.java:3029)
> org.jboss.aop.annotation.AnnotationElement.getVisibleAnnotation(AnnotationElement.java:88)
> org.jboss.aop.Advisor.resolveAnnotation(Advisor.java:321)
> org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:74)
> org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
> org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
> org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
> org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
> org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
> org.jboss.ejb3.service.ServiceContainer.localInvoke(ServiceContainer.java:329)
> org.jboss.ejb3.service.ServiceContainer.localInvoke(ServiceContainer.java:294)
> org.jboss.ejb3.service.ServiceMBeanDelegate.invoke(ServiceMBeanDelegate.java:215)
> org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
> org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
> org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
> $Proxy101.get(Unknown Source)

*Thread: AsyncNotifier-401* : priority:5, demon:false, threadId:812, threadState:BLOCKED, lockName:java.lang.Class at 741b31f2

> java.lang.Class.initAnnotationsIfNecessary(Class.java:3067)
> java.lang.Class.getAnnotation(Class.java:3029)
> org.jboss.aop.annotation.AnnotationElement.getVisibleAnnotation(AnnotationElement.java:88)
> org.jboss.aop.Advisor.resolveAnnotation(Advisor.java:321)
> org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:74)
> org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
> org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
> org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
> org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
> org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
> org.jboss.ejb3.service.ServiceContainer.localInvoke(ServiceContainer.java:329)
> org.jboss.ejb3.service.ServiceContainer.localInvoke(ServiceContainer.java:294)
> org.jboss.ejb3.service.ServiceMBeanDelegate.invoke(ServiceMBeanDelegate.java:215)
> org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
> org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
> org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
> $Proxy101.get(Unknown Source)


The method  java.lang.Class.initAnnotationsIfNecessary is synchronized and it seems that both threads are hanging on the same class  java.lang.Class at 741b31f2.

Any ideas why this would start happening all of a sudden? We upgraded to the latest java 6 patch recently and I am curious if any changes were made to the Class class ....

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