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...