Most of you would have noticed that during WCS instance startup if MQ connectivity is down or your MQ server is down the WCS server won't start up, I have noticed this with WCS 7 which was uses WAS 7.
The exception could be as follows
IBM Technote Details
http://www-01.ibm.com/support/docview.wss?uid=swg21469793
Fix Details
http://www-304.ibm.com/support/docview.wss?uid=swg1IZ76343
The exception could be as follows
com.ibm.mq.MQException: JMSCMQ0001: WebSphere MQ call
failed with compcode
Recently a fix was released by IBM to address this issue,this will be a WAS level fix, further details are available from IBM technote.
IBM Technote Details
http://www-01.ibm.com/support/docview.wss?uid=swg21469793
Fix Details
http://www-304.ibm.com/support/docview.wss?uid=swg1IZ76343