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From "Elihu Smails" <elihusma...@gmail.com>
Subject Re: memory leak problem with ActiveMQ 5.1
Date Wed, 19 Nov 2008 12:00:49 GMT
I am finally getting the chance to continue testing this and am still
getting OutOfMemory errors on the JVM that is sending messages to the
ActiveMQ server.  I have set the policy to
<noSubscriptionRecoveryPolicy/> on the ActiveMQ server using the
latest code in the trunk.

Anyone have any more ideas on how to prevent these OutOfMemory errors.

Thanks

On Thu, Oct 9, 2008 at 7:55 PM, Mark Webb <elihusmails@gmail.com> wrote:
> I have run across a memory leak that I have been able to reproduce.  I
> am profiling the sample application in NetBeans and I believe that I
> have traced the problem to
> org.apache.activemq.openwire.v3.BaseDataStreamMarshaller.tightUnmarshalByteSequence(DataInput,
> BooleanStream)
>
> The sample program is a very simple application that sends an object
> that I wrote to ActiveMQ every 200ms.  In NetBeans I am using the
> "Live Allocated Objects" view and approximately 80% of all objects are
> byte[].  If I view the Allocation Call Tree, the first few methods in
> the tree are:
>
> BaseDataStreamMarshaller.tightUnmarshalByteSequence(DataInput, BooleanStream)
>   org.apache.activemq.util.ByteArrayOutputStream.checkCapacity(int)
>       org.apache.activemq.util.ByteArrayOutputStream.<init>
>          java.lang.StringCoding$StringEncoder.encode(char[],int,int)
>
> The object that I am sending is a simple bean class and only contains
> an int, String and byte[].
>
> I am using the base configuration for ActiveMQ.  All my sample
> application does is call sendObject(Serializable) every 200ms.  Here
> is the simple JMS library that I wrote:
>
> ------------- START --------------------------
> public class JmsLib {
>
>    private TopicConnection connection;
>    private Session session;
>    private Topic destination;
>    private MessageProducer producer;
>    private MessageConsumer consumer;
>
>    public JmsLib( ActiveMQConnectionFactory connFactory, String dest
> ) throws JMSException {
>
>        connection = connFactory.createTopicConnection();
>        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
>        destination = session.createTopic( dest );
>        producer = session.createProducer( destination );
>        consumer = session.createConsumer( destination );
>        connection.start();
>    }
>
>    public void addMessageListener( MessageListener listener ) throws
> JMSException{
>        consumer.setMessageListener( listener );
>    }
>
>    public void sendObject( Serializable object ) throws JMSException{
>        ObjectMessage message = session.createObjectMessage( object );
>        producer.send(message);
>    }
> }
> --------------- END --------------------------
>
> Thanks for any help you may have...
>

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