IT15415: Memory leak in managed .NET application as a result of MQRC_CONNECTION_BROKEN (2009) situation

APAR status

• Closed as program error.

Error description

• An MQCONN operation was observed to return 2018 MQRC_HCONN_ERROR
  incorrectly, when 2002 MQRC_ALREADY_CONNECTED was expected.
  This occurred in an environment where IBM MQ Advanced Message
  Security was installed and AMQ_DISABLE_CLIENT_AMS was not set.
  
  This problem could not be solved from the traces available.  IBM
  MQ trace data has been improved to make it easier to support
  this issue if it happens in future.
  

Local fix

• The condition will not arise if this is set in the environment
  before
  starting the client (note, applies from fix pack 7.5.0.4, see
  APAR
  IC94205).
  AMQ_DISABLE_CLIENT_AMS=TRUE
  
  or
  
  An alternative (from 7.5.0.5, see APAR IT04580) is to add this
  setting to the mqclient.ini file:
  
   Security:
      DisableClientAMS=YES
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users who need to work with IBM Support to diagnose a 2018
  MQRC_HCONN_ERROR if this is returned from an MQCONN call when
  AMS is installed.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  Insufficient information was available in the MQ traces to help
  solve this issue.
  

Problem conclusion

• Extra information is now available in the MQ traces for the
  benefit of IBM support.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.5       7.5.0.8
  v8.0       8.0.0.6
  v9.0 CD    9.0.1
  v9.0 LTS   9.0.0.1
  
  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

  WEBSPHERE MQ 7.

• Fixed component ID

  5724H7240

Applicable component levels