Thanks.

How bad is it that I get these errors now? Wil I loose sessions?

Ronald.

On Fri Nov 19 20:34:21 CET 2004 Filip Hanik - Dev <[EMAIL PROTECTED]> wrote:

I've updated the delta request to avoid these errors in the next release of tomcat5.0 and tomcat 5.5
Filip

----- Original Message ----- From: Ronald Klop To: Filip Hanik - Dev Sent: Friday, November 19, 2004 10:44 AM Subject: Re: NoSuchElementException in cluster

Yes, but we never change the session. It only holds the User object, which is 
set at login.
I have looked at the tomcat code. This session replication is not thread safe 
as is documented.

This is my server.xml. It is a quite heavily used web-application with about 
2000-3000 sessions, 30 req/sec.

       <Cluster className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
                
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
                expireSessionsOnShutdown="false"
                useDirtyFlag="true">

           <Membership
               className="org.apache.catalina.cluster.mcast.McastService"
               mcastAddr="228.0.0.4"
               mcastPort="45564"
               mcastFrequency="500"
               mcastDropTime="3000"/>

           <Receiver
               className="org.apache.catalina.cluster.tcp.ReplicationListener"
               tcpListenAddress="213.53.208.169"
               tcpListenPort="4001"
               tcpSelectorTimeout="100"
               tcpThreadCount="6"/>

           <Sender
               
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
               replicationMode="pooled"/>

           <Valve className="org.apache.catalina.cluster.tcp.ReplicationValve"
                  filter=".*\.gif;.*\.js;.*\.jpg;.*\.htm;.*\.html;.*\.txt;"/>
       </Cluster>


Ronald.

On Fri Nov 19 17:17:19 CET 2004 Filip Hanik - Dev <[EMAIL PROTECTED]> wrote:
are you using frames or in anyway have your system setup to access the same 
session by more than one thread?

Filip

----- Original Message ----- From: "Ronald Klop" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <[EMAIL PROTECTED]>
Cc: "Ronald Klop" <[EMAIL PROTECTED]>
Sent: Friday, November 19, 2004 5:35 AM
Subject: Re: NoSuchElementException in cluster



Hello,

I found these two bug reports, looking similar to my issue below.

http://issues.apache.org/bugzilla/show_bug.cgi?id=27104
http://issues.apache.org/bugzilla/show_bug.cgi?id=31328

Are there any comments/ideas on this for version 5.0.x?

Ronald.

On Tue Nov 16 18:23:14 CET 2004 Ronald Klop <[EMAIL PROTECTED]> wrote:
>Sorry, I'm using Tomcat 5.0.28. Somebody upgraded the boxes.
> >On Tue Nov 16 16:43:29 CET 2004 Ronald Klop <[EMAIL PROTECTED]> wrote:
>>Hello,
>> >>I'm seeing these exceptions on one of my 2 nodes.
>>The memory cosumption of this server is now growing for a couple of hours, but I cannot tell if that is related with this.
>>I removed the server from the worker list of mod_jk so it is still in the cluster, but not receiving any requests anymore.
>> >>Any ideas about the exceptions. Are they harmless? Can they be related to a constantly growing amount of in-use memory?
>>I'm running Tomcat 5.0.25 on Linux 2.4 and 2.6 with JDK 1.4.2. It runs very well most of the time.
>> >>Ronald.
>> >>SEVERE: Unable to perform replication request.
>>java.util.NoSuchElementException
>>at java.util.LinkedList.remove(LinkedList.java:579)
>>at java.util.LinkedList.removeFirst(LinkedList.java:131)
>>at org.apache.catalina.cluster.session.DeltaRequest.reset(DeltaRequest.java:153)
>>at org.apache.catalina.cluster.session.DeltaSession.resetDeltaRequest(DeltaSession.java:938)
>>at org.apache.catalina.cluster.session.DeltaManager.requestCompleted(DeltaManager.java:786)
>>at org.apache.catalina.cluster.tcp.ReplicationValve.invoke(ReplicationValve.java:203)
>>at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
>>at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
>>at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
>>at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>>at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>>at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>>at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>>at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
>>at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
>>at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:300)
>>at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:374)
>>at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:743)
>>at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:675)
>>at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:866)
>>at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
>>at java.lang.Thread.run(Thread.java:534)
>> >>SEVERE: Unable to receive message through TCP channel
>>java.util.NoSuchElementException
>>at java.util.LinkedList.remove(LinkedList.java:579)
>>at java.util.LinkedList.removeFirst(LinkedList.java:131)
>>at org.apache.catalina.cluster.session.DeltaRequest.reset(DeltaRequest.java:153)
>>at org.apache.catalina.cluster.session.DeltaRequest.readExternal(DeltaRequest.java:184)
>>at org.apache.catalina.cluster.session.DeltaManager.loadDeltaRequest(DeltaManager.java:385)
>>at org.apache.catalina.cluster.session.DeltaManager.messageReceived(DeltaManager.java:898)
>>at org.apache.catalina.cluster.session.DeltaManager.messageDataReceived(DeltaManager.java:762)
>>at org.apache.catalina.cluster.tcp.SimpleTcpCluster.messageDataReceived(SimpleTcpCluster.java:576)
>>at org.apache.catalina.cluster.io.ObjectReader.execute(ObjectReader.java:70)
>>at org.apache.catalina.cluster.tcp.TcpReplicationThread.drainChannel(TcpReplicationThread.java:129)
>>at org.apache.catalina.cluster.tcp.TcpReplicationThread.run(TcpReplicationThread.java:67)
>> >> >> >







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