NPE during shutdown of embedded activemq
----------------------------------------
Key: AMQ-1930
URL: https://issues.apache.org/activemq/browse/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:
{code}
Async error occurred: java.lang.NullPointerException
java.lang.NullPointerException
at
org.apache.activemq.broker.TransportConnection.processRemoveConsumer(TransportConnection.java:542)
at org.apache.activemq.command.RemoveInfo.visit(RemoveInfo.java:64)
at
org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:292)
at
org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:180)
at
org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:104)
at
org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:68)
at
org.apache.activemq.transport.vm.VMTransport.iterate(VMTransport.java:205)
at
org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:122)
at
org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:43)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
{code}
The failure occurred at the following lines of code:
{code}
TransportConnectionState cs = lookupConnectionState(connectionId);
SessionState ss = cs.getSessionState(sessionId);
{code}
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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