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From sic <sic_1...@naver.com>
Subject ClassCastException having relation to expired messages
Date Wed, 01 Jul 2009 09:43:26 GMT

While testing ActiveMQ5.2.0, I have a question about expired message.

Note that testing messages are Persistent and using a queue, set message
expiration time to 10 seconds. configurations are same except destination
policy(using a vm queue cursor) as below
<destinationPolicy>
	<policyMap>
		<policyEntries>
			<policyEntry queue=">" memoryLimit="5mb">
				<dispatchPolicy>
					<strictOrderDispatchPolicy />
				</dispatchPolicy>
				<deadLetterStrategy>
					<individualDeadLetterStrategy queuePrefix="DLQ."/>
				</deadLetterStrategy>			
				<pendingQueuePolicy>
					<vmQueueCursor />
				</pendingQueuePolicy>
			</policyEntry>
		</policyEntries>
	</policyMap>
</destinationPolicy>
Additionally, it turns out that the activemq broker actually does not
proactively purge expired messages from queues. so we set
a thread that periodically cleared my queues of expired messages by help of
this forum's advisor.
We suppose that a server is stopped unexpectedly when expired message leaves
on queue without disposed by the thread
After recovering a server, we will expect that remained messages including
both normal and expired message are loaded normally
However server stopped abnormally and some error occured while starting
ActiveMQ. Errors are like that 

2009-07-01 17:13:45,125 [main           ] INFO  BrokerService                 
- For help or more information please see: http://activemq.apache.org/
2009-07-01 17:13:45,421 [main           ] INFO  KahaStore                     
- Kaha Store using data directory
D:\apache\apache-activemq-5.2.0\binary\bin\..\data\kr-store\data
2009-07-01 17:13:45,796 [main           ] ERROR BrokerService                 
- Failed to start ActiveMQ JMS Message Broker. Reason:
java.lang.ClassCastException:
org.apache.activemq.command.ActiveMQObjectMessage
java.lang.ClassCastException:
org.apache.activemq.command.ActiveMQObjectMessage
	at org.apache.activemq.broker.region.Queue.messageExpired(Queue.java:1114)
	at org.apache.activemq.broker.region.Queue.messageExpired(Queue.java:1106)
	at org.apache.activemq.broker.region.Queue$5.recoverMessage(Queue.java:173)
	at
org.apache.activemq.store.amq.RecoveryListenerAdapter.recoverMessage(RecoveryListenerAdapter.java:45)
	at
org.apache.activemq.store.amq.RecoveryListenerAdapter.recoverMessageReference(RecoveryListenerAdapter.java:56)
	at
org.apache.activemq.store.kahadaptor.KahaReferenceStore.recoverReference(KahaReferenceStore.java:82)
	at
org.apache.activemq.store.kahadaptor.KahaReferenceStore.recover(KahaReferenceStore.java:93)
	at
org.apache.activemq.store.amq.AMQMessageStore.recover(AMQMessageStore.java:481)
	at org.apache.activemq.broker.region.Queue.initialize(Queue.java:167)
	at
org.apache.activemq.broker.region.DestinationFactoryImpl.createDestination(DestinationFactoryImpl.java:83)
	at
org.apache.activemq.broker.region.AbstractRegion.createDestination(AbstractRegion.java:434)
	at
org.apache.activemq.broker.jmx.ManagedQueueRegion.createDestination(ManagedQueueRegion.java:56)
	at
org.apache.activemq.broker.region.AbstractRegion.addDestination(AbstractRegion.java:120)
	at
org.apache.activemq.broker.region.RegionBroker.addDestination(RegionBroker.java:261)
	at
org.apache.activemq.broker.BrokerFilter.addDestination(BrokerFilter.java:142)
	at
org.apache.activemq.broker.BrokerFilter.addDestination(BrokerFilter.java:142)
	at
org.apache.activemq.advisory.AdvisoryBroker.addDestination(AdvisoryBroker.java:147)
	at
org.apache.activemq.broker.BrokerFilter.addDestination(BrokerFilter.java:142)
	at
org.apache.activemq.broker.MutableBrokerFilter.addDestination(MutableBrokerFilter.java:149)
	at
org.apache.activemq.broker.region.AbstractRegion.start(AbstractRegion.java:94)
	at
org.apache.activemq.broker.region.RegionBroker.start(RegionBroker.java:176)
	at
org.apache.activemq.broker.jmx.ManagedRegionBroker.start(ManagedRegionBroker.java:103)
	at
org.apache.activemq.broker.TransactionBroker.start(TransactionBroker.java:112)
	at org.apache.activemq.broker.BrokerFilter.start(BrokerFilter.java:154)
	at org.apache.activemq.broker.BrokerFilter.start(BrokerFilter.java:154)
	at
org.apache.activemq.broker.MutableBrokerFilter.start(MutableBrokerFilter.java:161)
	at org.apache.activemq.broker.BrokerService.start(BrokerService.java:468)
	at
org.apache.activemq.xbean.XBeanBrokerService.afterPropertiesSet(XBeanBrokerService.java:52)
	at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1368)
	at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1334)
	at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
	at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
	at java.security.AccessController.doPrivileged(Native Method)
	at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
	at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
	at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
	at
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
	at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
	at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
	at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
	at
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729)
	at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381)
	at
org.apache.xbean.spring.context.ResourceXmlApplicationContext.<init>(ResourceXmlApplicationContext.java:64)
	at
org.apache.xbean.spring.context.ResourceXmlApplicationContext.<init>(ResourceXmlApplicationContext.java:52)
	at
org.apache.activemq.xbean.XBeanBrokerFactory.createApplicationContext(XBeanBrokerFactory.java:96)
	at
org.apache.activemq.xbean.XBeanBrokerFactory.createBroker(XBeanBrokerFactory.java:52)
	at
org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:71)
	at
org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:54)
	at
org.apache.activemq.console.command.StartCommand.startBroker(StartCommand.java:115)
	at
org.apache.activemq.console.command.StartCommand.runTask(StartCommand.java:74)
	at
org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)
	at
org.apache.activemq.console.command.ShellCommand.runTask(ShellCommand.java:129)
	at
org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)
	at
org.apache.activemq.console.command.ShellCommand.main(ShellCommand.java:79)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at org.apache.activemq.console.Main.runTaskClass(Main.java:225)
	at org.apache.activemq.console.Main.main(Main.java:106)
2009-07-01 17:13:45,812 [main           ] INFO  BrokerService                 
- ActiveMQ Message Broker (localhost, null) is shutting down
2009-07-01 17:13:45,828 [main           ] INFO  NetworkConnector              
- Network Connector default-nc Stopped

It's in Windows XP.

Regards
-- 
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