If you are using WebSphere® MQ in your environment and suspect a problem with it, you can enable logging specific to WebSphere MQ.
For information about enabling logging, refer to the tracing topic in the WebSphere MQ information center: http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/index.jsp?topic=/com.ibm.mq.amqzag.doc/fa15270_.htm