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From "Scott Stanton (JIRA)" <>
Subject [jira] Created: (AMQ-1930) NPE during shutdown of embedded activemq
Date Mon, 08 Sep 2008 17:59:52 GMT
NPE during shutdown of embedded activemq

                 Key: AMQ-1930
             Project: ActiveMQ
          Issue Type: Bug
          Components: Transport
    Affects Versions: 5.2.0
         Environment: revision 675393 of trunk, ActiveMQ 5.2.0
            Reporter: Scott Stanton

I received the following exception from the VMTransport thread when shutting down the broker:

Async error occurred: java.lang.NullPointerException
	at org.apache.activemq.command.RemoveInfo.visit(
	at org.apache.activemq.transport.ResponseCorrelator.onCommand(
	at org.apache.activemq.transport.TransportFilter.onCommand(
	at org.apache.activemq.transport.vm.VMTransport.iterate(
	at org.apache.activemq.thread.PooledTaskRunner.runTask(
	at org.apache.activemq.thread.PooledTaskRunner$
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(
	at java.util.concurrent.ThreadPoolExecutor$

The failure occurred at the following lines of code:
        TransportConnectionState cs = lookupConnectionState(connectionId);
        SessionState ss = cs.getSessionState(sessionId);

It appears that there is a race during shutdown where the connection state is discarded before
the last consumer is removed.

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