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http://jira.codehaus.org/browse/XFIRE-1130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=192743#action_192743
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Alexey Yudichev commented on XFIRE-1130:
----------------------------------------
Is anyone looking at this?
> NullPointerException in MessageIdCorrelator under multithreaded load
> --------------------------------------------------------------------
>
> Key: XFIRE-1130
> URL: http://jira.codehaus.org/browse/XFIRE-1130
> Project: XFire
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.2-RC
> Reporter: Alexey Yudichev
> Assignee: Dan Diephouse
>
> I am using XFire client in an 10-threaded environment and I am getting
> sporadic NPEs:
> org.codehaus.xfire.XFireRuntimeException: Could not invoke service.. Nested
> exception is org.codehaus.xfire.fault.XFireFault: Fault:
> java.lang.NullPointerException
> org.codehaus.xfire.fault.XFireFault: Fault: java.lang.NullPointerException
> at org.codehaus.xfire.fault.XFireFault.createFault(XFireFault.java:89)
> at org.codehaus.xfire.client.Client.onReceive(Client.java:386)
> at
> org.codehaus.xfire.transport.http.HttpChannel.sendViaClient(HttpChannel.java:134)
> at
> org.codehaus.xfire.transport.http.HttpChannel.send(HttpChannel.java:48)
> at
> org.codehaus.xfire.handler.OutMessageSender.invoke(OutMessageSender.java:26)
> at
> org.codehaus.xfire.handler.HandlerPipeline.invoke(HandlerPipeline.java:130)
> at org.codehaus.xfire.client.Invocation.invoke(Invocation.java:75)
> at org.codehaus.xfire.client.Client.invoke(Client.java:335)
> at
> org.codehaus.xfire.client.XFireProxy.handleRequest(XFireProxy.java:77)
> at org.codehaus.xfire.client.XFireProxy.invoke(XFireProxy.java:57)
> at $Proxy11.addTenorAndRoll(Unknown Source)
> [...higher levels stripped...]
> Caused by: java.lang.NullPointerException
> at
> org.codehaus.xfire.client.MessageIdCorrelator.correlate(MessageIdCorrelator.java:25)
> at
> org.codehaus.xfire.client.CorrelatorHandler.invoke(CorrelatorHandler.java:34)
> at
> org.codehaus.xfire.handler.HandlerPipeline.invoke(HandlerPipeline.java:130)
> at org.codehaus.xfire.client.Client.onReceive(Client.java:382)
> ... 64 more
> I tried placing a breakpoint on MessageIdCorrelator.java:25 with the
> condition "call == null || call.getContext() == null" and I managed to get it
> to stop on that breakpoint however evaluating call and call.getContext() did
> not give null any more. So I believe this is a synchronisation issue -can the
> invocations collections be updated by other threads that do not synchronize
> on the collection itself? Because Collections$SynchronizedSet does not
> synchronize on this, but rather on some separate mutex.
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