[mod_cluster-dev] Long stack traces

Trying to access a webapp (/web) in the node1/node2 cluster: the browser hangs and eventually (after several minutes returns a 503). CTRL-3 on node1 yielded several long stack traces (this is 2 dumps). Can someone look into it ? This goes on forever, even after the 503 is returned... Name: Incoming-12,192.168.1.5:57544 State: RUNNABLE Total blocked: 4 Total waited: 24,105 Stack trace: java.util.Collections$SynchronizedList.remove(Collections.java:1825) - locked java.util.Collections$SynchronizedList@45b84e09 org.jboss.classloader.spi.base.ClassLoaderManager.unregisterLoaderThread(ClassLoaderManager.java:115) - locked java.util.Collections$SynchronizedList@45b84e09 org.jboss.classloader.spi.base.BaseClassLoader.unlock(BaseClassLoader.java:1011) - locked org.jboss.classloader.spi.base.BaseClassLoader@7b17ad7b org.jboss.classloader.spi.base.BaseClassLoader.unlock(BaseClassLoader.java:894) org.jboss.classloader.spi.base.ClassLoaderManager.nextTask(ClassLoaderManager.java:289) org.jboss.classloader.spi.base.ClassLoaderManager.process(ClassLoaderManager.java:148) org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:256) org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:1099) org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(BaseClassLoader.java:735) org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:378) - locked org.jboss.classloader.spi.base.BaseClassLoader@3bbe9a50 java.lang.ClassLoader.loadClass(ClassLoader.java:252) java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) - locked org.jboss.classloader.spi.base.BaseClassLoader@3bbe9a50 java.lang.ClassLoader.defineClass1(Native Method) java.lang.ClassLoader.defineClass(ClassLoader.java:621) org.jboss.classloader.spi.base.BaseClassLoader.access$200(BaseClassLoader.java:62) org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:509) org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:469) java.security.AccessController.doPrivileged(Native Method) org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:467) - locked org.jboss.classloader.spi.base.BaseClassLoader@3bbe9a50 org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:444) org.jboss.classloader.spi.base.BaseDelegateLoader.loadClass(BaseDelegateLoader.java:134) org.jboss.classloader.spi.filter.FilteredDelegateLoader.loadClass(FilteredDelegateLoader.java:131) org.jboss.classloader.spi.base.ClassLoadingTask$ThreadTask.run(ClassLoadingTask.java:452) org.jboss.classloader.spi.base.ClassLoaderManager.nextTask(ClassLoaderManager.java:254) org.jboss.classloader.spi.base.ClassLoaderManager.process(ClassLoaderManager.java:148) org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:256) org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:1099) org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(BaseClassLoader.java:735) org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:378) - locked org.jboss.classloader.spi.base.BaseClassLoader@3bbe9a50 java.lang.ClassLoader.loadClass(ClassLoader.java:252) org.jboss.invocation.MarshalledValueInputStream.resolveClass(MarshalledValueInputStream.java:101) java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575) java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496) java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732) java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) java.util.HashSet.readObject(HashSet.java:291) sun.reflect.GeneratedMethodAccessor209.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947) java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871) java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) org.jboss.ha.framework.server.ClusterPartition.objectFromByteBufferResponseInternal(ClusterPartition.java:1887) org.jboss.ha.framework.server.ClusterPartition$ResponseMarshallerImpl.objectFromByteBuffer(ClusterPartition.java:2084) org.jgroups.blocks.RpcDispatcher$MarshallerAdapter.objectFromByteBuffer(RpcDispatcher.java:138) org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:557) org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:368) org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:775) org.jgroups.JChannel.up(JChannel.java:1274) org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:462) org.jgroups.protocols.pbcast.FLUSH.up(FLUSH.java:377) org.jgroups.protocols.pbcast.STATE_TRANSFER.up(STATE_TRANSFER.java:144) org.jgroups.protocols.FRAG2.up(FRAG2.java:192) org.jgroups.protocols.FC.up(FC.java:468) org.jgroups.protocols.pbcast.GMS.up(GMS.java:796) org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:233) org.jgroups.protocols.UNICAST.handleDataReceived(UNICAST.java:616) org.jgroups.protocols.UNICAST.up(UNICAST.java:282) org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:747) org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:167) org.jgroups.protocols.FD.up(FD.java:284) org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:308) org.jgroups.protocols.MERGE2.up(MERGE2.java:144) org.jgroups.protocols.Discovery.up(Discovery.java:263) org.jgroups.protocols.PING.up(PING.java:270) org.jgroups.protocols.TP$ProtocolAdapter.up(TP.java:2319) org.jgroups.protocols.TP.passMessageUp(TP.java:1253) org.jgroups.protocols.TP.access$100(TP.java:49) org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1830) org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1809) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) java.lang.Thread.run(Thread.java:619) "Incoming-12,192.168.1.5:57544" prio=10 tid=0x00000000455b1000 nid=0x7b55 runnable [0x000000003ed7f000..0x000000003ed82bf0] java.lang.Thread.State: RUNNABLE at java.util.Collections$SynchronizedCollection.isEmpty(Collections.java:1560) - locked <0x000000001d3ce1d0> (a java.util.Collections$SynchronizedList) at org.jboss.classloader.spi.base.ClassLoaderManager.unregisterLoaderThread(ClassLoaderManager.java:113) - locked <0x000000001d3ce1d0> (a java.util.Collections$SynchronizedList) at org.jboss.classloader.spi.base.BaseClassLoader.unlock(BaseClassLoader.java:1011) - locked <0x000000001ac6f480> (a org.jboss.classloader.spi.base.BaseClassLoader) at org.jboss.classloader.spi.base.BaseClassLoader.unlock(BaseClassLoader.java:894) at org.jboss.classloader.spi.base.ClassLoaderManager.nextTask(ClassLoaderManager.java:289) at org.jboss.classloader.spi.base.ClassLoaderManager.process(ClassLoaderManager.java:148) at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:256) at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:1099) at org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(BaseClassLoader.java:735) at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:378) - locked <0x0000000015c73390> (a org.jboss.classloader.spi.base.BaseClassLoader) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) - locked <0x0000000015c73390> (a org.jboss.classloader.spi.base.BaseClassLoader) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) at org.jboss.classloader.spi.base.BaseClassLoader.access$200(BaseClassLoader.java:62) at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:509) at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:469) at java.security.AccessController.doPrivileged(Native Method) at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:467) - locked <0x0000000015c73390> (a org.jboss.classloader.spi.base.BaseClassLoader) at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:444) at org.jboss.classloader.spi.base.BaseDelegateLoader.loadClass(BaseDelegateLoader.java:134) at org.jboss.classloader.spi.filter.FilteredDelegateLoader.loadClass(FilteredDelegateLoader.java:131) at org.jboss.classloader.spi.base.ClassLoadingTask$ThreadTask.run(ClassLoadingTask.java:452) at org.jboss.classloader.spi.base.ClassLoaderManager.nextTask(ClassLoaderManager.java:254) at org.jboss.classloader.spi.base.ClassLoaderManager.process(ClassLoaderManager.java:148) at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:256) at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:1099) at org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(BaseClassLoader.java:735) at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:378) - locked <0x0000000015c73390> (a org.jboss.classloader.spi.base.BaseClassLoader) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at org.jboss.invocation.MarshalledValueInputStream.resolveClass(MarshalledValueInputStream.java:101) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at java.util.HashSet.readObject(HashSet.java:291) at sun.reflect.GeneratedMethodAccessor209.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at org.jboss.ha.framework.server.ClusterPartition.objectFromByteBufferResponseInternal(ClusterPartition.java:1887) at org.jboss.ha.framework.server.ClusterPartition$ResponseMarshallerImpl.objectFromByteBuffer(ClusterPartition.java:2084) at org.jgroups.blocks.RpcDispatcher$MarshallerAdapter.objectFromByteBuffer(RpcDispatcher.java:138) at org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:557) at org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:368) at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:775) at org.jgroups.JChannel.up(JChannel.java:1274) at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:462) at org.jgroups.protocols.pbcast.FLUSH.up(FLUSH.java:377) at org.jgroups.protocols.pbcast.STATE_TRANSFER.up(STATE_TRANSFER.java:144) at org.jgroups.protocols.FRAG2.up(FRAG2.java:192) at org.jgroups.protocols.FC.up(FC.java:468) at org.jgroups.protocols.pbcast.GMS.up(GMS.java:796) at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:233) at org.jgroups.protocols.UNICAST.handleDataReceived(UNICAST.java:616) at org.jgroups.protocols.UNICAST.up(UNICAST.java:282) at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:747) at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:167) at org.jgroups.protocols.FD.up(FD.java:284) at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:308) at org.jgroups.protocols.MERGE2.up(MERGE2.java:144) at org.jgroups.protocols.Discovery.up(Discovery.java:263) at org.jgroups.protocols.PING.up(PING.java:270) at org.jgroups.protocols.TP$ProtocolAdapter.up(TP.java:2319) at org.jgroups.protocols.TP.passMessageUp(TP.java:1253) at org.jgroups.protocols.TP.access$100(TP.java:49) at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1830) at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1809) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) -- Bela Ban Lead JGroups / Clustering Team JBoss - 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