JBossDeveloper

Re: mod_proxy_ajp, your ProxyPass looks fine. There's the ProxyPassReverseCookieDomain directive to look into (see http://httpd.apache.org/docs/2.2/mod/mod_proxy.html#proxy) but if there was a problem with the cookie domain I'd expect it would be a non-stickyness problem but rather a loss of the session altogether.

Last night I reverted back to mod_jk 1.2.21. I have stickysession working correctly and load balancing working correctly. I no longer have any error messages regarding the session replication in the jboss log.

This leads me to believe the issue we are all having is with mod_proxy and not Jboss/TC session replication.

I highly recommend reading this Wiki and using mod_jk. Thanks.

http://www.jboss.org/wiki/Wiki.jsp?page=UsingMod_jk1.2WithJBoss

Hi all!

my setup is a little bit different... instead of using Apache WS, my client is using windows network load-balancer to achieve HA on the application (they felt apache will be the single point of failure). so i used default settings with no jk_mod. the session got replicated properly but still i get the same error message.

i don't feel this will be serious though. any un-usual thing happened when this warning came out??

Hi,
I'm seeing similar issue.

"bstansberry@jboss.com" wrote:

Everyone else -- is anyone seeing this problem with sticky sessions enabled and working properly? You have to use sticky sessions.

/JSESSION

 /localhost

 /myapp

 /s6YGpkbACWfDPVre4sMcqQ**
VERSION: 3
s6YGpkbACWfDPVre4sMcqQ**: [B@5e43ee

ERROR [org.jboss.web.tomcat.tc5.session.JBossCacheService] externalizeSession(): exception occurred externalizing session SessionBasedClusteredSession[id: s6YGpkbACWfDPVre4sMcqQ**.worker1 lastAccessedTime: 1184115870097 version: 13 lastOutdated: 0]
java.lang.NullPointerException
 at org.springframework.webflow.execution.FlowSessionImpl.writeObject(FlowSessionImpl.java:156)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
...

WARN [org.jboss.web.tomcat.tc5.session.CacheListener] Possible concurrency problem: Replicated version id 13 matches in-memory version for session s6YGpkbACWfDPVre4sMcqQ**

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

Hi,

I am trying to cluster 2 jboss 4.2.2.GA instances with apache 2.0.x load balancer.

I have enabled sticky session by "worker.loadbalancer.sticky_session=1".

I ve the default values for "Isolation level" and "CacheMode"

REPEATABLE_READ

<!-- Valid modes are LOCAL, REPL_ASYNC and REPL_SYNC

If you use REPL_SYNC and a UDP-based ClusterConfig
we recommend you comment out the FC (flow control)
protocol in the ClusterConfig section below.
-->
REPL_ASYNC



Also, my jboss-web.xml is

<jboss-web>
<replication-config>
<replication-trigger>SET_AND_NON_PRIMITIVE_GET</replication-trigger>
<replication-granularity>SESSION</replication-granularity>
<replication-field-batch-mode>true</replication-field-batch-mode>
</replication-config>
</jboss-web>


I found my exception stack trace for one server as:

18:08:32,991 ERROR [STDERR] log4j:ERROR A "org.jboss.logging.appender.FileAppender" object is not assignable to a "org.apache.log4j.Appender" variable.
18:08:32,991 ERROR [STDERR] log4j:ERROR The class "org.apache.log4j.Appender" was loaded by
18:08:32,991 ERROR [STDERR] log4j:ERROR [WebappClassLoader
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
java.net.FactoryURLClassLoader@fe03b3
] whereas object of type
18:08:32,991 ERROR [STDERR] log4j:ERROR "org.jboss.logging.appender.FileAppender" was loaded by [org.jboss.system.server.NoAnnotationURLClassLoader@cdedfd].
18:08:32,991 ERROR [STDERR] log4j:ERROR Could not instantiate appender named "FILE".
18:08:35,152 ERROR [[TestContainer]] Servlet.service() for servlet TestContainer threw exception
javax.servlet.ServletException: Service id "Echo.ContentPane" not registered.
at nextapp.echo2.webrender.WebRenderServlet.process(WebRenderServlet.java:253)
at nextapp.echo2.webrender.WebRenderServlet.doGet(WebRenderServlet.java:179)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.service.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:87)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437)
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:366)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:675)
18:08:35,296 ERROR [[TestContainer]] Servlet.service() for servlet TestContainer threw exception
javax.servlet.ServletException: Service id "Echo.TextComponent" not registered.
at nextapp.echo2.webrender.WebRenderServlet.process(WebRenderServlet.java:253)
at nextapp.echo2.webrender.WebRenderServlet.doGet(WebRenderServlet.java:179)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.service.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:87)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437)
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:366)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:675)
18:08:35,310 ERROR [[TestContainer]] Servlet.service() for servlet TestContainer threw exception
javax.servlet.ServletException: Service id "Echo.Button" not registered.
at nextapp.echo2.webrender.WebRenderServlet.process(WebRenderServlet.java:253)
at nextapp.echo2.webrender.WebRenderServlet.doGet(WebRenderServlet.java:179)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.service.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:87)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437)
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:366)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:675)
18:08:36,106 INFO [STDOUT] java.io.FileNotFoundException: sses/d/Trend/source/2008-06-26_18:08:27.862.html (No such file or directory)
18:08:42,471 INFO [STDOUT] Pages Downloaded
18:08:42,474 INFO [STDOUT] Error in Parser.java::java.io.FileNotFoundException: sses/d/Trend/source/2008-06-26_18:08:27.862.html (No such file or directory)
18:09:00,228 INFO [CacheListener] Possible concurrency problem: Replicated version id 8 matches in-memory version for session UkxTM9dXOUBJbgCo6b4SPg**
18:26:38,389 INFO [STDOUT] 2
18:26:38,753 INFO [STDOUT] 4
18:26:39,115 INFO [STDOUT] 6


And for the 2nd server:

18:04:21,890 ERROR [STDERR] log4j:ERROR "org.jboss.logging.appender.FileAppender" was loaded by [org.jboss.system.server.NoAnnotationURLClassLoader@1c39a2d].
18:04:21,891 ERROR [STDERR] log4j:ERROR Could not instantiate appender named "FILE".
18:04:23,272 INFO [CacheListener] Possible concurrency problem: Replicated version id 2 matches in-memory version for session UkxTM9dXOUBJbgCo6b4SPg**
18:04:31,137 INFO [STDOUT] Pages Downloaded
18:04:31,153 INFO [STDOUT]
In Constructor. dbSelector = casperdb
18:04:31,232 INFO [STDOUT] From DatabaseManager Connect getConnection():org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
18:04:31,232 INFO [STDOUT] From DatabaseManager getRow():java.lang.NullPointerException
18:04:31,232 INFO [STDOUT] Error in Parser.java::java.lang.NullPointerException
18:04:48,328 INFO [CacheListener] Possible concurrency problem: Replicated version id 8 matches in-memory version for session UkxTM9dXOUBJbgCo6b4SPg**
18:22:26,706 INFO [STDOUT] 3
18:22:27,046 INFO [STDOUT] 5
18:22:27,416 INFO [STDOUT] 7


PS: Finally the application is running. But I am getting problem with the other components of java.


Please let me know what to be done to avoid that

18:04:48,328 INFO [CacheListener] Possible concurrency problem: Replicated version id 8 matches in-memory version for session UkxTM9dXOUBJbgCo6b4SPg**

Thanks in advance,
Praveena.