[jboss-user] [Clustering/JBoss] - HTTP Session Tomcat / JBoss Issue

[ben@utilitran.com]

Hello All,

I'm having problems with my setup of clustering.

Here is the information, and the problem

2 JBOSS Nodes Running  4.0.5.GA

10:19:37,494 INFO  [Server] Starting JBoss (MX MicroKernel)...
  | 10:19:37,496 INFO  [Server] Release ID: JBoss [Zion] 4.0.5.GA (build: CVSTag=Branch_4_0 date=200610162339)

An apache frontend running.. 2.2.4

Server version: Apache/2.2.4 (Unix)
  | Server built:   Jul  1 2007 18:11:30

Apache frontend is running Mod JK 1.2.23

Module Name: mod_jk-1.2.23-apache-2.2.x.so
  | 
httpd.conf
-----------

<IfModule mod_jk.c>
  |         JkLogFile /var/log/httpd/modjk.log
  |         JkLogLevel info
  |         JkWorkersFile /etc/httpd/jkworkers.properties
  |         JkShmFile /var/log/httpd/jk.shm
  |         JkOptions +ForwardKeySize +ForwardURICompatUnparsed -ForwardDirectories
  |         LogFormat "%h %l %u %t \"%r\" %>s %b %{JK_WORKER_NAME}n %{JK_LB_FIRST_NAME}n %{JK_LB_FIRST_BUSY}n %{JK_LB_LAST_NAME}n %{JK_LB_LAST_BUSY}n" mod_jk_log
  |         CustomLog /var/log/httpd/modjk_access.log mod_jk_log
  | 
  |         # JK Balancer manager
  |         <VirtualHost *:80>
  |             ServerAdmin test at test.com
  |             DocumentRoot /srv/httpd/htdocs
  |             JkMount /* jboss
  |         </VirtualHost>
  | 
  |         <VirtualHost *:5555>
  |                 ServerAdmin test at test.com
  |                 DocumentRoot /srv/httpd/htdocs
  |                 <Location /status/>
  |                     JkMount jkstatus
  |                 </Location>
  |         </VirtualHost>
  | </IfModule>


jkworkers.properties
-----------------------

  | worker.list=jboss,jkstatus
  | 
  | # First Node
  | worker.node1.type=ajp13
  | worker.node1.host=192.168.7.235
  | worker.node1.port=7929
  | worker.node1.lbfactor=1
  | worker.node1.socket_timeout=10
  | worker.node1.connect_timeout=20000
  | 
  | # Second Node
  | worker.node2.type=ajp13
  | worker.node2.host=192.168.7.236
  | worker.node2.port=7929
  | worker.node2.lbfactor=1
  | worker.node2.socket_timeout=10
  | worker.node2.connect_timeout=20000
  | 
  | # Load balancer
  | worker.jboss.type=lb
  | worker.jboss.balance_workers=node1,node2
  | worker.jboss.sticky_session=1
  | 
  | worker.jkstatus.type=status

tc5-cluster.sar/META-INF/jboss-service.xml

<attribute name="ClusterName">Tomcat-${jboss.partition.name:Cluster}</attribute>
  | <attribute name="IsolationLevel">REPEATABLE_READ</attribute>
  | <attribute name="CacheMode">REPL_ASYNC</attribute>
  | 
-----------------------

Here's the issue.

I start up the cluster, and all works fine. The moment I start putting any load onto it I get the following problem....


10:25:41,060 INFO  [CacheListener] Possible concurrency problem: Replicated version id 22 matches in-memory version for session ml5CzYIuE0X62k2vNReP4g**
  | 10:25:59,215 INFO  [CacheListener] Possible concurrency problem: Replicated version id 10 matches in-memory version for session GXDm0EZryMgDh-e17hE2Eg**
  | 10:26:04,487 INFO  [CacheListener] Possible concurrency problem: Replicated version id 11 matches in-memory version for session GXDm0EZryMgDh-e17hE2Eg**
  | 10:26:04,508 WARN  [MsgContext] Error sending end packet
  | java.net.SocketException: Broken pipe
  |         at java.net.SocketOutputStream.socketWrite0(Native Method)
  |         at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
  |         at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
  |         at org.apache.jk.common.ChannelSocket.send(ChannelSocket.java:531)
  |         at org.apache.jk.common.JkInputStream.endMessage(JkInputStream.java:112)
  |         at org.apache.jk.core.MsgContext.action(MsgContext.java:293)
  |         at org.apache.coyote.Response.action(Response.java:182)
  |         at org.apache.coyote.Response.finish(Response.java:304)
  |         at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:204)
  |         at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282)
  |         at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:767)
  |         at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:697)
  |         at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:889)
  |         at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
  |         at java.lang.Thread.run(Thread.java:595)
  | 10:26:04,512 WARN  [ChannelSocket] processCallbacks status 2
  | 10:31:06,604 INFO  [CacheListener] Possible concurrency problem: Replicated version id 4 matches in-memory version for session ml5CzYIuE0X62k2vNReP4g**
  | 10:31:10,643 INFO  [CacheListener] Possible concurrency problem: Replicated version id 5 matches in-memory version for session ml5CzYIuE0X62k2vNReP4g**

Does anyone have any idea why this problem is occuring?

Any solutions to this problem, is an issue with my configuration?

Thanks for the help in Advance,

Ben



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