I was able to send and receive 500 * 1024 * 1024 bytes, if removing one reference of the memory (that would use 500M of memory): Index: src/org/jboss/jms/example/LargeMessageExample.java | =================================================================== | --- src/org/jboss/jms/example/LargeMessageExample.java (revision 6312) | +++ src/org/jboss/jms/example/LargeMessageExample.java (working copy) | @@ -68,10 +68,12 @@ | | //Step 7. Create a BytesMessage with 1MB arbitrary bytes | BytesMessage message = session.createBytesMessage(); | - message.writeBytes(new byte[1024 * 1024]); | + message.writeBytes(new byte[500 * 1024 * 1024]); | | //Step 8. Send the Message | producer.send(message); | + | + message = null; | | System.out.println("Large Message sent"); | | @@ -84,7 +86,7 @@ | connection.start(); | | //Step 11. Receive the message | - BytesMessage messageReceived = (BytesMessage) messageConsumer.receive(5000); | + BytesMessage messageReceived = (BytesMessage) messageConsumer.receive(120000); | | System.out.println("Received message: " + messageReceived.getBodyLength() + " bytes"); | And by adding more memory on the VM: Index: jms/common/build.xml | =================================================================== | --- jms/common/build.xml (revision 6312) | +++ jms/common/build.xml (working copy) | @@ -104,7 +104,8 @@ | <target name="runExample" depends="compile"> | <java classname="${example.classname}" fork="true" resultproperty="example-result"> | <jvmarg value="-XX:+UseParallelGC"/> | - <jvmarg value="-Xms512M"/> | + <jvmarg value="-verbose:gc"/> | + <jvmarg value="-Xms1024M"/> | <jvmarg value="-Xmx2048M"/> | <jvmarg value="-XX:+AggressiveOpts"/> | <jvmarg value="-XX:+UseFastAccessorMethods"/> | I rememver having a conversation with you about supporting ClientFiles through JMS, and I remember we deciding on support that thorugh the core-api. If we do want to expose it thorugh JMS, we would need some special methods to specify the Client directory.. and how to add a fileHandle to a message. (Or maybe having StreamMessage storing the data on a temporary file). I will do a little more extensive testing on monday to make sure nothing is broken. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4223488#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...