[mod_cluster-dev] Long stack traces

Bela Ban bela at jboss.com
Tue Dec 23 08:03:49 EST 2008 

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 at 45b84e09
org.jboss.classloader.spi.base.ClassLoaderManager.unregisterLoaderThread(ClassLoaderManager.java:115)
   - locked java.util.Collections$SynchronizedList at 45b84e09
org.jboss.classloader.spi.base.BaseClassLoader.unlock(BaseClassLoader.java:1011)
   - locked org.jboss.classloader.spi.base.BaseClassLoader at 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 at 3bbe9a50
java.lang.ClassLoader.loadClass(ClassLoader.java:252)
java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
   - locked org.jboss.classloader.spi.base.BaseClassLoader at 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$2.run(BaseClassLoader.java:469)
java.security.AccessController.doPrivileged(Native Method)
org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:467)
   - locked org.jboss.classloader.spi.base.BaseClassLoader at 3bbe9a50
org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:444)
org.jboss.classloader.spi.base.BaseDelegateLoader.loadClass(BaseDelegateLoader.java:134)
org.jboss.classloader.spi.filter.FilteredDelegateLoader.loadClass(FilteredDelegateLoader.java:131)
org.jboss.classloader.spi.base.ClassLoadingTask$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 at 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 - a division of Red Hat

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