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From "Puneet Gupta (JIRA)" <>
Subject [jira] Updated: (AMQ-2294) MessageProducer hangs when using many concurrent sessions
Date Wed, 17 Jun 2009 18:36:35 GMT


Puneet Gupta updated AMQ-2294:

    Attachment: ServerDebugLog_ThreadDump.txt

The client seems to hang at org.apache.activemq.transport.FutureResponse.getResult()

   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x03fc6578> (a java.util.concurrent.locks.Abstra
        at java.util.concurrent.locks.LockSupport.park(
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject
        at java.util.concurrent.ArrayBlockingQueue.take(
        at org.apache.activemq.transport.FutureResponse.getResult(FutureResponse
        at org.apache.activemq.transport.ResponseCorrelator.request(ResponseCorr
        at org.apache.activemq.ActiveMQConnection.syncSendPacket(ActiveMQConnect
        at org.apache.activemq.ActiveMQSession.send(
        - locked <0x0454b128> (a java.lang.Object)
        at org.apache.activemq.ActiveMQMessageProducer.send(ActiveMQMessageProdu
        at org.apache.activemq.ActiveMQMessageProducerSupport.send(ActiveMQMessa
        at perf.harness.ProducerObj.sendMsg(

> MessageProducer hangs when using many concurrent sessions
> ---------------------------------------------------------
>                 Key: AMQ-2294
>                 URL:
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker, JMS client
>    Affects Versions: 5.2.0
>         Environment: I am using the default activemq.xml config. tested and reproduced
on both windows and linux machines
>            Reporter: Puneet Gupta
>         Attachments: Producer_ThreadDump.txt, ServerDebugLog_ThreadDump.txt
> If you create a client (producer) that creates 25 non-transacted sessions and concurrently
starts sending messages. The producer will hang after sending exactly 2560 1K messages. 
> This behavior is very easily reproducible.

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