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From "Brian Topping (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-2445) Repeating NPE on shutdown under Tomcat
Date Wed, 07 Oct 2009 19:39:52 GMT
Repeating NPE on shutdown under Tomcat
--------------------------------------

                 Key: AMQ-2445
                 URL: https://issues.apache.org/activemq/browse/AMQ-2445
             Project: ActiveMQ
          Issue Type: Bug
          Components: Message Store
    Affects Versions: 5.2.0
            Reporter: Brian Topping


When AMQ is embedded in Tomcat 6 with the vm: connector, the following exception is occasionally
produced in large quantity:

Exception in thread "Persistence Adaptor Task" java.lang.NullPointerException
	at org.apache.log4j.LogManager.getLogger(LogManager.java:188)
	at org.apache.log4j.Logger.getLogger(Logger.java:104)
	at org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.java:289)
	at org.apache.commons.logging.impl.Log4JLogger.isDebugEnabled(Log4JLogger.java:299)
	at org.apache.activemq.store.amq.AMQPersistenceAdapter.doCheckpoint(AMQPersistenceAdapter.java:380)
	at org.apache.activemq.store.amq.AMQPersistenceAdapter$1.iterate(AMQPersistenceAdapter.java:237)
	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:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:637)

It seems to happen more reliably when there are messages that have been transactionally rolled
back to the queue over the course of the execution.

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