PH26615: Large message delivered to async consumer with incorrect CCSID specified in MQMD header

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When using the GMO_CONVERT option, an application receives a
  message larger than the original buffer length.  The message
  body has been converted, but the MQMD.CodedCharSetId reports the
  original CCSID before the message was converted.
  
  The application is using asynchronous consume directly, or is a
  Java/JMS application.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 0 Modification 0 and Version 9       *
  *                 Release 1 Modification 0                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: When performing async consume with      *
  *                      convert the staging area may be         *
  *                      resized. When this happens, the MQMD    *
  *                      may be overwritten, causing the message *
  *                      to return a converted body with the     *
  *                      MQMD of the unconverted message.        *
  ****************************************************************
  A logic error when handling conversion of large messages within
  the MQ channel process meant that the MQMD prior to
  data conversion could be written into the returned data instead
  of the MQMD after conversion. As such the CCSID and encoding
  fields did not correctly reflect the converted data being
  returned.
  

Problem conclusion

• The MQ conversion logic has been corrected to return the MQMD
  fields reflecting the data after conversion.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  PH01744

• APAR is sysrouted TO one or more of the following:

  UI70557 UI70558

Modules/Macros

• CMQXRSTF
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R000 PSY UI70557

     UP20/08/08 P F008

• R100 PSY UI70558

     UP20/08/08 P F008

Fix is available

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