IC85253: SHARED MEMORY LEAK IN WEBSPHERE MQ FOR WINDOWS WHEN USING THE WINDOWS PERFORMANCE MONITOR

WebSphere MQ V7.0 Fix Pack 7.0.1.10

APAR status

• Closed as program error.

Error description

• When an MQ performance counter is active in a Data Collector
  Set, calling the PdhEnumObjects Windows API may result in a
  shared memory leak of 220KB.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users who query Windows performance counters programmatically
  may be affected by this problem.
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM SUMMARY:
  When Windows opens an MQ performance counter, MQ maps a view of
  a shared memory file. When this performance counter is closed,
  the view of the shared memory file is not unmapped, leading to a
  memory leak.
  

Problem conclusion

• The code was changed so that the file is unmapped when the
  performance counter is closed.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.0
  Platform           Fix Pack 7.0.1.10
  --------           --------------------
  Windows            U200352
  
  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

• R701 PSY

     UP