[jboss-jira] [JBoss JIRA] Created: (JGRP-386) RequestCorrelator thread safety issue

[Bela Ban (JIRA)]

RequestCorrelator thread safety issue
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                 Key: JGRP-386
                 URL: http://jira.jboss.com/jira/browse/JGRP-386
             Project: JGroups
          Issue Type: Bug
    Affects Versions: 2.4
            Reporter: Bela Ban
         Assigned To: Bela Ban
             Fix For: 2.4.1


[Dave Oxley]
We have had a deadlock issue with JGroups. The same issue affects 2.2.8 and 2.4.0. The call_stack in blocks.RequestCorrelator is a class variable and is set when a message is processed in util.Scheduler with deadlock_detection set to true. However if multiple threads call sendRequest in blocks.RequestCorrelator then they pick up the call_stack that may not be relevant to that request. This is most evident when concurrent_processing is also set to true as the call_stack grows permanently. The attached patch (against the 2.4 branch) makes call_stack a ThreadLocal and is set by the util.ReusableThread used to process the request. I've also changed the setConcurrentProcessing methods so that they work after the various objects have already been constructed.


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