IC62566: Queue manager crashes. Various FDCs are produced with probe ids beginning with ZC from zcp functions (eg ZC046010)

WebSphere MQ V7.0 Fix Pack 7.0.1.1
WebSphere MQ V7.0 Fix Pack 7.0.1.2
WebSphere MQ V6, Fix Pack 6.0.2.9
WebSphere MQ V6.0 for iSeries Fix Pack 6.0.2.9

APAR status

• Closed as program error.

Error description

• The queue manager ends unexpectedly. Symptoms vary but FDCs are
  typically observed from customer applications with Probe Id
  ZC007063 and ZC003010. There may also be FDCs produced from the
  execution controller with Probe Id ZC046010. This error only
  occurs in an environment whereby a multi-threaded server
  application is connecting to more than one queue manager.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Any users of WebSphere MQ using a multi-threaded server
  application to simultaneously connect to many different queue
  managers.
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM SUMMARY:
  The problem was caused by the fact that WebSphere MQ was not
  cleaning up the process cache of event handles when an
  application thread that is connected to a queue manager
  terminates without having issued an MQDISC request. As a
  result, another application thread requesting a new connection
  to a different queue manager could potentially end up using a
  cached event handle associated with the previous queue manager
  due to the checks in the process cache not being sufficiently
  unique to differentiate between two separate queue managers.
  This event handle was then posted when trying to establish
  communications with the new queue manager by putting messages
  on the IPCC pipe for that queue manager. This would end up
  posting the wrong queue manager.
  

Problem conclusion

• WebSphere MQ was modified to ensure that the process cache of
  event handles is invalidated when a thread ends even if it does
  not perform an MQDISC against an MQ connection.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v6.0
  Platform           Fix Pack 6.0.2.9
  --------           --------------------
  Windows            U200313
  
                     v7.0
  Platform           Fix Pack 7.0.1.1
  --------           --------------------
  Windows            U200310
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available, information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

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

  WMQ WINDOWS V7

• Fixed component ID

  5724H7220

Applicable component levels

• R700 PSY

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