IV55911: WEBSPHERE MQ 7.1 OR 7.5, XMS C/C++ CLIENT APPLICATION CAN NOT MQGET BIGGER MESSAGE WHEN MQMD VERSION 1 IS USED.

WebSphere MQ V7.5 Fix Pack 7.5.0.4
Fix Pack 7.1.0.6 for WebSphere MQ V7.1

APAR status

• Closed as program error.

Error description

• When using the Async Consume functionality, an XMS client is
  not able to retrieve large messages from WebSphere MQ Version
  7.1 or 7.5 queue managers. It seems that the XMS client always
  expects to retrieve a message with MQMD.Version 2, even if the
  customer does not specify it to be Version 2. The issue
  encountered is that messages are being returned with a Version 1
  on larger messages. Smaller messages are returned with a
  Version 2. This is a separate issue from the APAR IV53820.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of asynchronous consume who are using applications
  which require or expect a specific version level of the MQMD
  header for the messages returned to them. The XMS client is an
  example which supports version 2.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM SUMMARY:
  When a multi-phase get was required internally to fetch a
  message, due to the need to increase the internal buffer size,
  the logic which ensures the MQMD returned is of the correct
  version was bypassed. Due to this code being bypassed, an MQMD
  could be provided to the client application which is not of
  the expected version.
  

Problem conclusion

• The flow of execution has been altered to ensure that the
  logic responsible for setting the MQMD version is not bypassed.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.1       7.1.0.6
  v7.5       7.5.0.4
  
  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 AIX V7

• Fixed component ID

  5724H7221

Applicable component levels

• R710 PSY

     UP