I think there is a memory retention problem in the JMS binding component.

Here is my test scenario.

I have a JMS provider service unit and a JMS consumer service unit linked
together.
I have a simple Java program that continuously sends text messages to a JMS
topic (managed by the servicemix embedded activemq server). My consumer
listens on this topic and sends the received message to the JMS provider.
I have another simple Java program that listens to another JMS topic (the
one the provider is writing to).
The consumer endpoint uses a in only MEP (in a first attempt, I used an
in/out MEP, but I rapidly realized that messages were accumulating inside
ther servicemix/activemq server).

I use 2 message sizes.
I'm using jconsole to monitor the memory consumption of servicemix (and the
state of my topics through JMX beans).
With short messages (20Kb xml text), I have a 200Mb memory retention after
sending about 1 million messages.
This week-end, I'm running another test with 1Mb XML messages (I will have a
result tomorrow morning). In that case, there are fewer messages that pass
through servicemix.

Using visualvm (to count instances), I found a map
(JMSComponent.knownExchanges) that contains roughtly as many entries as the
number of messages who did pass through servicemix. This map contains
message IDs.

I think the memory retention problem is proportional to the number of
messages exchanged. With bigger messages, the time to reach 200Mb memory
leak will be far longer than with 20Kb messages.

Thanks in advance for any answer / correction / patch / workaround.
Best regards,
Damien MORCELLET

PS : I'm @home and I do not have the source code for this test (xbean.xml
files, Maven projects and test Java emitter/receiver).

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