[ http://jira.jboss.com/jira/browse/RF-3631?page=comments#action_12415945 ]
Nick Belaevski commented on RF-3631:
------------------------------------
For 3.2.0.SR1:
java.util.ConcurrentModificationException
at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.ja
va:365)
at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:384)
at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:383)
at java.util.HashMap.writeObject(HashMap.java:1037)
at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:91
7)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:13
39)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.jav
a:1290)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
at java.util.HashMap.writeObject(HashMap.java:1039)
at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:91
7)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:13
39)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.jav
a:1290)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java
:1375)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:13
47)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.jav
a:1290)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
at java.util.concurrent.ConcurrentHashMap.writeObject(ConcurrentHashMap.
java:1380)
at sun.reflect.GeneratedMethodAccessor103.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:91
7)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:13
39)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.jav
a:1290)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
at org.jboss.web.tomcat.service.session.SessionBasedClusteredSession.wri
teExternal(SessionBasedClusteredSession.java:175)
at org.jboss.web.tomcat.service.session.JBossCacheService.externalizeSes
sion(JBossCacheService.java:1027)
at org.jboss.web.tomcat.service.session.JBossCacheService.putSession(JBo
ssCacheService.java:316)
at org.jboss.web.tomcat.service.session.JBossCacheClusteredSession.proce
ssSessionRepl(JBossCacheClusteredSession.java:121)
at org.jboss.web.tomcat.service.session.JBossCacheManager.processSession
Repl(JBossCacheManager.java:1097)
at org.jboss.web.tomcat.service.session.JBossCacheManager.storeSession(J
BossCacheManager.java:652)
at org.jboss.web.tomcat.service.session.InstantSnapshotManager.snapshot(
InstantSnapshotManager.java:49)
at org.jboss.web.tomcat.service.session.ClusteredSessionValve.invoke(Clu
steredSessionValve.java:98)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv
e.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedC
onnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:262)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ss(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44
6)
at java.lang.Thread.run(Thread.java:595)
> ConcurrentModificationException during session serialization
> ------------------------------------------------------------
>
> Key: RF-3631
> URL: http://jira.jboss.com/jira/browse/RF-3631
> Project: RichFaces
> Issue Type: Bug
> Affects Versions: 3.1.5, 3.2.0
> Environment: JBboss 4.2.2.GA
> Seam 2.0.2.SP1
> JDK 1.5.0_15
> Windows XP Pro SP2
> Reporter: Stanimir Stamenkov
> Attachments: test-cluster-session.ear
>
>
> Concurrent requests cause java.util.ConcurrentModificationException during
> session serialization in cluster environment.
> I've initially posted this issue to the RichFaces users forum, but then
> posted to the Clustering/JBoss, too:
> http://www.jboss.com/index.html?module=bb&op=viewtopic&t=136590
> where I've got feedback I'm on the right track my problem is probably caused
> by the RichFaces (Ajax4Jsf) library. Basically the web session gets modified
> while it is been serialized when concurrent requests are made. [EMAIL
> PROTECTED] have written:
> "The session management layer does not prevent concurrent access to the
> session. The session's internal data structures can deal with concurrency
> (e.g. the attribute map is a ConcurrentHashMap) but if the objects you'll
> store in it are going to be accessed concurrently, they'll need to be thread
> safe or have access to them synchronized."
> I've prepared minimal test case (I'm about to attach) demonstrating the
> problem. I've tried it with both RichFaces 3.1.5.GA (part of Seam 2.0.2.SP1)
> and RichFaces 3.2.0.SR1 (which I'm using with my application).
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