IZ89490: IBM Message service Clients for .Net XMS .Net 2.0 SESSION.COMMIT CALL HANG

WebSphere MQ V7.0 Fix Pack 7.0.1.5
WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.5

APAR status

• Closed as program error.

Error description

• XMS Session.Commit call hangs when the XMS Message Listener's
  call back is busy processing the messages and at the same-time
  main thread issues for MessageListener deregistration
  (MessageListener= null).
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This problem would affect users using XMS .Net 2.0 connecting to
  WMQ in Asynchronous mode performing Commit call in
  OnMessageCallBack method and simultaneously consumer/session
  close from a different thread.
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM SUMMARY:
  The deadlock between the commit call and message listener on 2
  threads simultaneously was causing this issue.
  

Problem conclusion

• We added few thread safety locks to the asynchronous message
  handling code.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  MSG SRVCS CL .N

• Fixed component ID

  5724M2100

Applicable component levels

• R200 PSY

     UP