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From Badri <badrinarayanan.doraisw...@fxall.com>
Subject Re: Out Of Memory Error while running TopicPublisher/TopicListener
Date Tue, 16 Sep 2008 16:57:30 GMT

Active MQ 5.2


rajdavies wrote:
> 
> Which version ?
> On 16 Sep 2008, at 17:33, Badri wrote:
> 
>>
>> Hi
>>
>> I am trying to simulate slow consumer using the classes
>> (TopicPublisher/TopicListener) provided in examples.
>>
>> I wanted to see if Web Console prints the Advisory topic for Slow  
>> Consumer.
>> But I am facing Out Of Memory Error & the consumer stops abruptly.
>>
>> Following are changes I did:
>>
>> activemq.xml:
>>
>>        <transportConnectors>
>>            <transportConnector name="openwire"
>> uri="tcp://localhost:61616?maxInactivityDuration=-1"/>
>>        </transportConnectors>
>>
>>
>> TopicListener: I added a sleep of 1000 to induce some slowness.
>>            if (++count % 1000 == 0) {
>>                System.out.println("Received " + count + " messages.");
>> 				try
>> 				{
>> 					Thread.sleep(1000);
>> 				}
>> 				catch (Exception e)
>> 				{
>> 					
>> 				}
>>            }
>>
>> I give java -Xmx256m -Xms128m when using TopicListener.
>> After maybe 5 minutes it crashes. After receiving anywhere between  
>> 15-20
>> batches of 1000 messages, it crashes.
>>
>> Exception:
>> Received 9000 messages.
>> Received 10000 messages.
>> javax.jms.JMSException: Unexpected error occured
>>        at
>> org.apache.activemq.util.JMSExceptionSupport.create(JMSExceptionSuppo
>> rt.java:62)
>>        at
>> org.apache.activemq.ActiveMQConnection.syncSendPacket(ActiveMQConnect
>> ion.java:1255)
>>        at
>> org.apache.activemq.ActiveMQSession.send(ActiveMQSession.java:1659)
>>        at
>> org.apache.activemq.ActiveMQMessageProducer.send(ActiveMQMessageProdu
>> cer.java:227)
>>        at
>> org.apache.activemq.ActiveMQMessageProducerSupport.send(ActiveMQMessa
>> geProducerSupport.java:241)
>>        at TopicListener.onMessage(TopicListener.java:96)
>>        at
>> org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageC
>> onsumer.java:983)
>>        at
>> org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionE
>> xecutor.java:122)
>>        at
>> org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionEx
>> ecutor.java:192)
>>        at
>> org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.
>> java:122)
>>        at
>> org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.ja
>> va:43)
>>        at
>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExec
>> utor.java:885)
>>        at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
>> .java:907)
>>        at java.lang.Thread.run(Thread.java:619)
>> Caused by: java.io.IOException: Unexpected error occured
>>        at
>> org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:
>> 191)
>>        ... 1 more
>> Caused by: java.lang.OutOfMemoryError: Java heap space
>>        at
>> org.apache.activemq.openwire.v3.BaseDataStreamMarshaller.tightUnmarsh
>> alByteSequence(BaseDataStreamMarshaller.java:440)
>>        at
>> org.apache.activemq.openwire.v3.MessageMarshaller.tightUnmarshal(Mess
>> ageMarshaller.java:68)
>>        at
>> org.apache.activemq.openwire.v3.ActiveMQMessageMarshaller.tightUnmars
>> hal(ActiveMQMessageMarshaller.java:67)
>>        at
>> org.apache.activemq.openwire.v3.ActiveMQBytesMessageMarshaller.tightU
>> nmarshal(ActiveMQBytesMessageMarshaller.java:67)
>>        at
>> org.apache.activemq.openwire.OpenWireFormat.tightUnmarshalNestedObjec
>> t(OpenWireFormat.java:453)
>>        at
>> org.apache.activemq.openwire.v3.BaseDataStreamMarshaller.tightUnmarsa
>> lNestedObject(BaseDataStreamMarshaller.java:126)
>>        at
>> org.apache.activemq.openwire.v3.MessageDispatchMarshaller.tightUnmars
>> hal(MessageDispatchMarshaller.java:72)
>>        at
>> org.apache.activemq.openwire.OpenWireFormat.doUnmarshal(OpenWireForma
>> t.java:362)
>>        at
>> org.apache.activemq.openwire.OpenWireFormat.unmarshal(OpenWireFormat.
>> java:276)
>>        at
>> org.apache.activemq.transport.tcp.TcpTransport.readCommand(TcpTranspo
>> rt.java:209)
>>        at
>> org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.jav
>> a:201)
>>        at
>> org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:
>> 184)
>>        ... 1 more
>> Received 1000 messages.
>> Received 2000 messages.
>>
>> TopicPublisher:
>> private long batch(int msgCount) throws Exception {
>> // Commented out call to waitForCompletion
>> // waitForCompletion();
>> }
>>
>> QN 1) I just want to know if I am configuring something wrong. Or  
>> should I
>> increase -Xmx512m when running TopicListener to get rid of OOME?
>>
>> QN 2) Will the advisory topic:
>> ActiveMQ.Advisory.SlowConsumer.Topic.topictest.messages appear only  
>> if the
>> consumer starts discarding messages? What is the basis for this  
>> topic to
>> appear in Web console?
>>
>> Thanks for your time & reply.
>> -- 
>> View this message in context:
>> http://www.nabble.com/Out-Of-Memory-Error-while-running-TopicPublisher-TopicListener-tp19515522p19515522.html
>> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>>
> 
> 
> 

-- 
View this message in context: http://www.nabble.com/Out-Of-Memory-Error-while-running-TopicPublisher-TopicListener-tp19515522p19516039.html
Sent from the ActiveMQ - User mailing list archive at Nabble.com.


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