Details
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Type:
Bug
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: 1.8.2-EE-GA_P02
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Fix Version/s: 1.8.3, EE-1.8.2.GA_P03
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Component/s: Framework
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Labels:None
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Environment:Websphere 7
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Support Case References:
Description
Load testing an application on Websphere 7 with a load of 2400 concurrent users the following exception occurs:
Trace: 2011/05/06 17:40:34.644 01 t=9B64F8 c=UNK key=P8 (13007002)
ThreadId: 0000005d
FunctionName: com.icesoft.faces.webapp.http.servlet.SessionDispatcher$Monitor.shutdown
SourceId: com.icesoft.faces.webapp.http.servlet.SessionDispatcher
Category: INFO
ExtendedMessage: Session already invalidated.
Trace: 2011/05/06 17:40:34.644 01 t=9B64F8 c=UNK key=P8 (00000011)
Description: Log Java Message
Message: Session already invalidated.
Exception in thread "Session Monitor" java.util.ConcurrentModificationException
.at java.util.HashMap$AbstractMapIterator.checkConcurrentMod(HashMap.java:122)
.at java.util.HashMap$AbstractMapIterator.makeNext(HashMap.java:127)
.at java.util.HashMap$ValueIterator.next(HashMap.java:212)
.at java.util.AbstractCollection.toArray(AbstractCollection.java:333)
.at java.util.ArrayList.<init>(ArrayList.java:87)
.at com.icesoft.faces.webapp.http.servlet.SessionDispatcher$Listener$1.run(SessionDispatcher.java:276)
Trace: 2011/05/06 18:09:48.887 01 t=9B93E8 c=UNK key=P8 (13007002)
ThreadId: 00000055
FunctionName: com.ibm.ws.runtime.component.ThreadMonitorImpl
SourceId: com.ibm.ws.runtime.component.ThreadMonitorImpl
Category: WARNING
ExtendedMessage: BBOO0221W: WSVR0605W: Thread "WebSphere:ORB.thread.pool t=009af5d0" (00000025) has been active for 710189 millise
conds and may be hung. There is/are 1 thread(s) in total in the server that may be hung.
Trace: 2011/05/06 17:40:34.644 01 t=9B64F8 c=UNK key=P8 (13007002)
ThreadId: 0000005d
FunctionName: com.icesoft.faces.webapp.http.servlet.SessionDispatcher$Monitor.shutdown
SourceId: com.icesoft.faces.webapp.http.servlet.SessionDispatcher
Category: INFO
ExtendedMessage: Session already invalidated.
Trace: 2011/05/06 17:40:34.644 01 t=9B64F8 c=UNK key=P8 (00000011)
Description: Log Java Message
Message: Session already invalidated.
Exception in thread "Session Monitor" java.util.ConcurrentModificationException
.at java.util.HashMap$AbstractMapIterator.checkConcurrentMod(HashMap.java:122)
.at java.util.HashMap$AbstractMapIterator.makeNext(HashMap.java:127)
.at java.util.HashMap$ValueIterator.next(HashMap.java:212)
.at java.util.AbstractCollection.toArray(AbstractCollection.java:333)
.at java.util.ArrayList.<init>(ArrayList.java:87)
.at com.icesoft.faces.webapp.http.servlet.SessionDispatcher$Listener$1.run(SessionDispatcher.java:276)
Trace: 2011/05/06 18:09:48.887 01 t=9B93E8 c=UNK key=P8 (13007002)
ThreadId: 00000055
FunctionName: com.ibm.ws.runtime.component.ThreadMonitorImpl
SourceId: com.ibm.ws.runtime.component.ThreadMonitorImpl
Category: WARNING
ExtendedMessage: BBOO0221W: WSVR0605W: Thread "WebSphere:ORB.thread.pool t=009af5d0" (00000025) has been active for 710189 millise
conds and may be hung. There is/are 1 thread(s) in total in the server that may be hung.
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While checking for expired sessions in the SessionMonitors map other sessions might be created and added to the map. By synchronizing access to the SessionMonitors map triggering ConcurrentModificationExceptions is avoided.