Hi all,

I am having some issues where from time to time my JBoss 5.2 instance(s) won't fully start up.

I can see in the logs, that the JBoss instance(s) gets until the ** INFO [Version] HV000001: Hibernate Validator 4.3.1.Final ** point, and after that it just hangs and never completes. I have found so far that this happens due to deadlocks that occur while the instance(s) is starting. Running "jstack
", would show me the deadlock which i provide below. The instances are running an ATG10.2 application. I don't see any resource issues on my servers(plenty of memory, plenty of space)

Here is where the deadlock happens:

Found one Java-level deadlock:

"Thread-12":
waiting to lock monitor 0x000000004956e470 (object 0x0000000400d9e870, a java.lang.Object),
which is held by "main"
"main":
waiting for ownable synchronizer 0x00000004013f1bd8, (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
which is held by "Thread-12"

And here are the top line of the stack for "main" and "Thread-12":

Java stack information for the threads listed above:

"Thread-12":
at java.beans.Introspector.getBeanInfo(Introspector.java:157)
- waiting to lock <0x0000000400d9e870> (a java.lang.Object)
at org.jboss.aop.advice.GenericAspectFactory.configureInstance(GenericAspectFactory.java:223)
at org.jboss.aop.advice.GenericAspectFactory.createPerVM(GenericAspectFactory.java:147)
at org.jboss.aop.AspectManager.createPerVmAspect(AspectManager.java:2052)
- locked <0x00000006d7b9c0b0> (a org.jboss.aop.advice.AspectDefinition)
at org.jboss.aop.AspectManager.getPerVMAspect(AspectManager.java:2028)
- locked <0x00000006d7b9c0b0> (a org.jboss.aop.advice.AspectDefinition)
at org.jboss.aop.AspectManager.getPerVMAspect(AspectManager.java:2011)
at org.jboss.aop.advice.PerVmAdvice.generateOptimized(PerVmAdvice.java:51)
- locked <0x00000003f4949dc0> (a java.lang.Class for org.jboss.aop.advice.PerVmAdvice)
at org.jboss.aop.advice.AdviceFactory.create(AdviceFactory.java:106)
at org.jboss.aop.Advisor.createInterceptorChain(Advisor.java:1328)
at org.jboss.aop.Advisor.pointcutResolved(Advisor.java:1942)
at org.jboss.aop.MethodMatchInfo.applyBinding(MethodMatchInfo.java:152)
at org.jboss.aop.MethodMatchInfo.simplePopulateBindings(MethodMatchInfo.java:113)
at org.jboss.aop.MethodMatchInfo.populateBindings(MethodMatchInfo.java:96)
at org.jboss.aop.Advisor.finalizeMethodChain(Advisor.java:1553)
at org.jboss.aop.ClassAdvisor.finalizeChains(ClassAdvisor.java:741)
at org.jboss.aop.ClassAdvisor.doRebuildInterceptorsForAddedBinding(ClassAdvisor.java:1163)
at org.jboss.aop.ClassAdvisor$RebuildInterceptorsAction$2.rebuildInterceptorsForAddedBinding(ClassAdvisor.java:2367)
at org.jboss.aop.ClassAdvisor.rebuildInterceptorsForAddedBinding(ClassAdvisor.java:1141)
at org.jboss.aop.Advisor.newBindingAdded(Advisor.java:1134)
- locked <0x00000007487bcde0> (a org.jboss.aop.ClassAdvisor)
at org.jboss.aop.AspectManager.updateAdvisorsForAddedBinding(AspectManager.java:1530)
- locked <0x00000004012d09b0> (a java.util.WeakHashMap)
at org.jboss.aop.AspectManager.addBinding(AspectManager.java:1491)
- locked <0x00000004012d09b0> (a java.util.WeakHashMap)
at org.jboss.aop.AspectXmlLoader.deployBinding(AspectXmlLoader.java:292)
at org.jboss.aop.AspectXmlLoader.deployTopElements(AspectXmlLoader.java:1145)
at org.jboss.aop.AspectXmlLoader.deployXML(AspectXmlLoader.java:990)
at org.jboss.aop.AspectXmlLoader.deployXML(AspectXmlLoader.java:981)
at org.jboss.jms.client.container.JmsClientAspectXMLLoader.deployXML(JmsClientAspectXMLLoader.java:93)
- locked <0x00000004012d0908> (a org.jboss.aop.AspectManager)

"main":
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000004013f1bd8> (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:811)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:941)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1261)
at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:677)
at org.jboss.aop.util.AOPLock.lockRead(AOPLock.java:40)
at org.jboss.aop.AspectManager.translate(AspectManager.java:1060)
at org.jboss.aop.AspectManager.transform(AspectManager.java:1023)
at org.jboss.aop.standalone.AOPTransformer.aspectTransform(AOPTransformer.java:87)
at org.jboss.aop.standalone.AOPTransformer.transform(AOPTransformer.java:75)
at sun.instrument.TransformerManager.transform(TransformerManager.java:169)
at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:365)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at org.jboss.classloader.spi.base.BaseClassLoader.access$200(BaseClassLoader.java:48)
at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:637)
at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:596)
at java.security.AccessController.doPrivileged(Native Method)
at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:595)
- locked <0x00000007406c4210> (a org.jboss.classloader.spi.base.BaseClassLoader)
at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:572)
at org.jboss.classloader.spi.base.BaseDelegateLoader.loadClass(BaseDelegateLoader.java:135)
at org.jboss.classloader.spi.filter.FilteredDelegateLoader.loadClass(FilteredDelegateLoader.java:131)
at org.jboss.classloader.spi.base.ClassLoadingTask$ThreadTask.run(ClassLoadingTask.java:455)
at org.jboss.classloader.spi.base.ClassLoaderManager.nextTask(ClassLoaderManager.java:267)
at org.jboss.classloader.spi.base.ClassLoaderManager.process(ClassLoaderManager.java:166)
at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:304)
at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:1261)
at org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(BaseClassLoader.java:914)
at org.jboss.classloader.spi.base.BaseClassLoader.doLoadClass(BaseClassLoader.java:506)
- locked <0x00000007406c4210> (a org.jboss.classloader.spi.base.BaseClassLoader)

Anyone has ran into this deadlock before? Any suggestion is highly appreciated. If you need any other information, please let me know.
If it helps to see the full stack of the two deadlocks, i can also provide that.

Thank you in advance !