PI51156: MQRC 2120 MQRC_CONVERTED_MSG_TOO_BIG ON MQGET

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• RC=2120(MQRC_CONVERTED_MSG_TOO_BIG/MQRC_TRUNCATED) returned to
  the MQGET with convert after migrating to V7.1.
  - Problem occurs when the user data includes DBCS character.
  L3 recreated the problem and found:
  CSQAIVS6 uses the ?convert_fields macro, but this sets
  both the input and the output buffer lengths to the size of the
  input data, i.e. it does not allow for expansion - the message
  in question is 4006 bytes after conversion.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 1 Modification 0                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: An MQGET with convert fails RC=2120     *
  *                      (MQRC_CONVERTED_MSG_TOO_BIG) for a      *
  *                      message of type MQFMT_IMS_VAR_STRING or *
  *                      MQFMT_RF_HEADER_1.                      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The customer reported that an IMS message (format
  MQFMT_IMS_VAR_STRING) failed in MQGET with convert with RC=2120
  (MQRC_CONVERTED_MSG_TOO_BIG).
  The problem occurs due to CSQAIVS6 not anticipating that the
  message may expand due to the insertion of SO/SI (in the
  reported case the conversion was from CCSID 943 to 5046),
  resulting in the MQRC 2120.
  A similar problem exists for RFH1 messages.
  

Problem conclusion

• CSQAIVS6 now uses ?convert_fields with the OUTMAX parameter to
  allow the whole message to be converted successfully.
  The same has been done for CSQARFH6.
  100Y
  CSQAIVS6
  CSQARFH6
  

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:

  PI51880 UI32984

Modules/Macros

• CSQAIVS6 CSQARFH6
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R100 PSY UI32984

     UP15/12/15 P F512

Fix is available

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