Message Driven Bean (MDB) running on Websphere Application Server, leaves channel connections open

Hi I have two Message Driven Beans (MDBs) running on Websphere Application Server v7. It is connecting to, and receiving messages from Websp开发者_如何学Chere MQ v6. On the Queue Manager, we notice that the number of open channel connections keeps on growing, and appears as though the MDBs are not releasing these connections. I am not aware of any errors happening in the onMessage method of the MDBs which could cause it to not exit cleanly.

Any advise on what could be causing this would be greatly appreciated Thanks Gavin

There is a known issue with WAS v7 connecting to WMQ V6 where MDBs do not reconnect. The APAR mentions failures after a WMQ outage but other types of failure can result in similar behavior.

In general, the advice is to move to WMQ v7 since WMQ V6 is out of service as of September 2011. The fix was released in v7.0.1.1 and later. No v6 fix pack is listed for delivery of this APAR, although it doesn't mention why. So if you cannot upgrade to v7.0.1.1 or later, then obtain via a PMR and apply IC64098 and see if that solves the problem.

References:
PSP #1316899: Information about using the WebSphere MQ messaging provider for WebSphere Application Server Version 7.0
IBM IC64098: APPLICATION DOES NOT AUTOMATICALLY RECONNECT TO THE QUEUE MANAGER IF CONNECTION IS LOST WHEN USING THE MQ RESOURCE ADAPTER

You need to upgrade WMQ v7.0.1.1 or later version since this is a known issue with WAS v7 connecting to WMQ V6.