Problem with ClusteredSession
Hi,
I have a problem with session replication because the class org.jboss.web.tomcat.session.ClusteredSession not synchronize the hash of attributes in writeObject method. I modified the class to synchronize this hash and resolved my problem. What can I do now about this? This problem was solved?
JBoss version: 3.2.3 (build: CVSTag=JBoss_3_2_3 date=200311301445)
PS: Sorry by bad english!
Darlan Oliveira
Class implementation
-------------------------
private void writeObject(java.io.ObjectOutputStream out)
throws IOException
{
synchronized (attributes) {
out.defaultWriteObject();
}
}
StackTrace
-------------
2004-03-10 11:53:13,765 ERROR [Thread-34][org.jboss.ejb.plugins.LogInterceptor] EJBException:
javax.ejb.EJBException: java.util.ConcurrentModificationException
at org.jboss.ha.httpsession.beanimpl.ejb.ClusteredHTTPSessionBeanImpl.serializeSession(ClusteredHTTPSessionBeanImpl.java:114)
at org.jboss.ha.httpsession.beanimpl.ejb.ClusteredHTTPSessionBeanImpl.ejbStore(ClusteredHTTPSessionBeanImpl.java:52)
at org.jboss.ejb.plugins.CMPPersistenceManager.storeEntity(CMPPersistenceManager.java:398)
at org.jboss.ejb.EntityContainer.storeEntity(EntityContainer.java:713)
at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchronizationInterceptor.java:312)
at org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterceptor.java:163)
at org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.java:89)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122)
at org.jboss.ha.httpsession.beanimpl.ejb.ServerTCLInterceptor.invoke(ServerTCLInterceptor.java:40)
at org.jboss.ejb.EntityContainer.internalInvoke(EntityContainer.java:490)
at org.jboss.ejb.Container.invoke(Container.java:700)
at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:546)
at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:101)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:90)
at org.jboss.ha.httpsession.beanimpl.ejb.ClientTCLInterceptor.invoke(ClientTCLInterceptor.java:46)
at org.jboss.proxy.ejb.EntityInterceptor.invoke(EntityInterceptor.java:97)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:85)
at $Proxy29.setSession(Unknown Source)
at org.jboss.ha.httpsession.server.ClusteredHTTPSessionService.setHttpSession(ClusteredHTTPSessionService.java:112)
at sun.reflect.GeneratedMethodAccessor31.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:546)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
at $Proxy178.setHttpSession(Unknown Source)
at org.jboss.web.tomcat.session.ClusterManager.storeSession(ClusterManager.java:571)
at org.jboss.web.tomcat.session.InstantSnapshotManager.snapshot(InstantSnapshotManager.java:38)
at org.jboss.web.tomcat.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:89)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:65)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:263)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:360)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:604)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:562)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:679)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:534)
2004-03-10 11:53:13,796 WARN [Thread-34][org.jboss.web.tomcat.session.InstantSnapshotManager] Failed to replicate sessionID:6mj8gRoOeMMjba9HNeaZKQ**.worker2
javax.ejb.EJBException: Exception in setHttpSession: java.rmi.ServerException: EJBException:; nested exception is:
javax.ejb.EJBException: java.util.ConcurrentModificationException
at org.jboss.ha.httpsession.server.ClusteredHTTPSessionService.setHttpSession(ClusteredHTTPSessionService.java:116)
at sun.reflect.GeneratedMethodAccessor31.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:546)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
at $Proxy178.setHttpSession(Unknown Source)
at org.jboss.web.tomcat.session.ClusterManager.storeSession(ClusterManager.java:571)
at org.jboss.web.tomcat.session.InstantSnapshotManager.snapshot(InstantSnapshotManager.java:38)
at org.jboss.web.tomcat.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:89)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:65)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:263)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:360)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:604)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:562)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:679)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:534)
