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From "Hans Bausewein (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-1849) Slave threads increasing when sending to temporary queue
Date Thu, 10 Jul 2008 10:44:00 GMT

    [ https://issues.apache.org/activemq/browse/AMQ-1849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44162#action_44162
] 

Hans Bausewein commented on AMQ-1849:
-------------------------------------

Everytime it happens, I get a ClassCastException in "data/activemq.log" on the slave host:

2008-07-10 11:48:33,907 [t: vm://slavehost#1] ERROR Queue                          - Failed
to page in more queue messages 
java.lang.ClassCastException: org.apache.activemq.command.ActiveMQTextMessage cannot be cast
to org.apache.activemq.broker.region.QueueMessageReference
        at org.apache.activemq.broker.region.Queue.messageExpired(Queue.java:1045)
        at org.apache.activemq.broker.region.Queue.messageExpired(Queue.java:1037)
        at org.apache.activemq.broker.region.Queue.doPageIn(Queue.java:1117)
        at org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1196)
        at org.apache.activemq.broker.region.Queue.iterate(Queue.java:951)
        at org.apache.activemq.broker.region.Queue.wakeup(Queue.java:1077)
        at org.apache.activemq.broker.region.Queue.sendMessage(Queue.java:1072)
        at org.apache.activemq.broker.region.Queue.doMessageSend(Queue.java:470)
        at org.apache.activemq.broker.region.Queue.send(Queue.java:413)
        at org.apache.activemq.broker.region.AbstractRegion.send(AbstractRegion.java:350)
        at org.apache.activemq.broker.region.RegionBroker.send(RegionBroker.java:437)
        at org.apache.activemq.broker.TransactionBroker.send(TransactionBroker.java:224)
        at org.apache.activemq.broker.BrokerFilter.send(BrokerFilter.java:126)
        at org.apache.activemq.broker.CompositeDestinationBroker.send(CompositeDestinationBroker.java:95)
        at org.apache.activemq.broker.MutableBrokerFilter.send(MutableBrokerFilter.java:133)
        at org.apache.activemq.broker.TransportConnection.processMessage(TransportConnection.java:437)
        at org.apache.activemq.command.ActiveMQMessage.visit(ActiveMQMessage.java:624)
        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.DedicatedTaskRunner.runTask(DedicatedTaskRunner.java:98)
        at org.apache.activemq.thread.DedicatedTaskRunner$1.run(DedicatedTaskRunner.java:36)


> Slave threads increasing when sending to temporary queue
> --------------------------------------------------------
>
>                 Key: AMQ-1849
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1849
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.2.0
>         Environment: Pure master/slave
> JBoss 4.0.5 GA   (on Java 1.5.0_14)
> few days old ActiveMQ 5.2.0-SNAPSHOT (on Java  "1.6.0_06")
>            Reporter: Hans Bausewein
>         Attachments: activemqjee-0.0.1-src.tar.gz, activemqjee-0.0.2-src.tar.gz, jboss.log
>
>
> Deployed the attached TextMDB (modified JBoss example) to our JBoss 4.0.5 GA server (cluster).
> - send a message to "queue.A" with Reply To set to "queue.REPLY_A"
> The TextMDB bean: 
>    - creates a temporary queue with NON_PERSISTENT delivery mode
>    - forwards message body to "queue.B" and sets the reply queue to this temporary queue
>    - another (or the same) instance of TextMDB replies and adds some text, replies to
the temporary queue
>    - the first TextMDB replies to "queue.REPLY_A"
> Works fine, except that every time a temporary queue message is sent, the number of threads
on the slave increases by 3.
> On the master the threads are destroyed after a while, but on the slave they persist,
growing to "OutOfMemoryError: unable to create new native thread"
> Temporary queue Thread Name example: TempQueue:  ID:{HOSTNAME}-59619-1215591084487-0:16:5
> + 2 topic threads
> That thread ID can be found ActiveMQ messages in the attached JBoss log.
> Have I created a bug im my code or have I found a bug in the ActiveMQ server?

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