IT31901: Memory leak in the AMS (Advanced Message Security) component of IBM MQ

APAR status

• Closed as program error.

Error description

• Heap memory use from one or more amqrmppa or C client processes
  is seen to rise in an uncontrolled manner while using AMS.  If
  the queue manager is not restarted then resource error FDCs may
  be seen and the queue manager or C client application may be
  unable to continue to function.
  

Local fix

• The impact of the problem can be lessened by restarting the
  affected C client application (if using client-side AMS
  interception), or queue manager (if using MCA interception) to
  reclaim memory.  Reducing the turnover of connections and open
  AMS protected queue handles will also help to reduce memory use.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users of the IBM MQ AMS functionality where the quality of
  protection is set to Confidentiality may be affected by this
  problem.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  Memory allocated by IBM MQ to support the AMS functionality was
  not being freed.  This memory leak may be seen in the amqrmppa
  process, or in a C client application if client-side AMS is
  being used.
  

Problem conclusion

• The IBM MQ code was modified to ensure that allocated memory was
  freed.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.0 LTS   9.0.0.12
  v9.1 LTS   9.1.0.7
  v9.2 LTS   9.2.0.2
  v9.x CD    9.2.2
  
  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

  IBM MQ BASE M/P

• Fixed component ID

  5724H7261

Applicable component levels