IT18374: IBM MQ MEMORY LEAK IF ACTIVITY TRACE IS CONFIGURED AND APPLICATION ENDS WITHOUT CALLING MQDISC.

APAR status

• Closed as program error.

Error description

• Memory usage of the IBM MQ amqzlaa0 process may be seen to rise
  over time in an uncontrolled manner.  If corrective action is
  not taken
  then free memory on the system may become exhausted.
  

Local fix

• Applications should disconnect cleanly using MQDISC
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users of activity trace that have applications which do not
  cleanly disconnect may be affected by this problem
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  Some memory was allocated by the activity trace functionality
  while an application was connected to the queue manager.  This
  application ended without disconnecting from the queue manager
  and the memory allocated by the activity trace functionality was
  leaked.
  

Problem conclusion

• The code is corrected so that all memory that is allocated by
  the activity trace functionality is freed when cleanup
  processing takes place for applications that end without
  disconnecting from the queue manager.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.5       7.5.0.8
  v8.0       8.0.0.7
  v9.0 CD    9.0.3
  v9.0 LTS   9.0.0.2
  
  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

  WMQ BASE MULTIP

• Fixed component ID

  5724H7241

Applicable component levels