[EJB 3.0 Development] - Possible Deadlock Jboss 4.2.3 - jboss-dev-forums

Friday, 7 May 2010

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@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@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@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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[EJB 3.0 Development] - Possible Deadlock Jboss 4.2.3