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From "Markus Karolus (JIRA)" <>
Subject [jira] [Created] (AMQNET-401) NullReferenceException from Apache.NMS.ActiveMQ.Transport.InactivityMonitor
Date Wed, 05 Dec 2012 21:41:57 GMT
Markus Karolus created AMQNET-401:

             Summary: NullReferenceException from Apache.NMS.ActiveMQ.Transport.InactivityMonitor

                 Key: AMQNET-401
             Project: ActiveMQ .Net
          Issue Type: Bug
          Components: NMS
    Affects Versions: 1.5.6
         Environment: Windows Server 2008 R2, .Net 4.0
            Reporter: Markus Karolus
            Assignee: Jim Gomes
            Priority: Critical

It's the same problem which is descibed in,
in the current version (1.5.6) the real problem is not fixed, so I created this new issue.

Today we had an crash on one of our enviromental boxes:
Directly after a failover we got the following message from the InactivityMonitor "InactivityMonitor[{0}]:
Timer Task didn't shutdown properly."
Afterwards the whole process shuts down after an UnhandledException handling. In the WriteCheck
method a NullReferenceException was thrown.

It seems that during the StopMonitorThreads the timer connectionCheckTimer couldn't stop correctly
and ansyncTasks exists. Directly after that the asyncTasks will be set to null -> In the
currenr running WriteCheck a NullReferenceException occures. 

(This problem was already commented in AMQNET-339 as last comment from Matthew Good)

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