PH29385: CSQX541E WITH DATA CONVERSION FAILED FFST WHILE CONVERTING MQPMO FROM CCSID 1208 TO 500

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The FFST is occurring due to being unable to convert the MQPMO
  structure. When an MQPMO is received, the character fields are
  converted from their received CCSID (1208 - ASCII in this case)
  to the CCSID of the system (500 - EBCDIC). Since the
  ResolvedQMgrName and ResolvedQName are output only fields,
  queue manager doesn't convert them upon receipt, and instead
  rely on them being populated during the proceeding MQPUT. The
  queue manager subsequently convert all of the character fields
  back (EBCDIC to ASCII) before returning them to the sender.
  
  Most of the time this is fine, since the MQPUT will populate
  the ResolvedQMgrName and ResolvedQName fields with EBCDIC data
  which can be converted as required. However, in this case, the
  put is to an ALIAS queue which resolves to a TOPIC, so the
  queue manager doesn't fill in the ResolvedQMgrName and
  ResolvedQName fields. This leads the queue manager to thinking
  that they must be in EBCDIC, but they're actually still in
  ASCII (since conversion was skipped before). This is what
  causes the conversion problems and the FFST.
  

Local fix

• Explicitly set the ResolvedQMgrName and ResolvedQName fields to
  '00'x
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 0 Modification 0, Release 1          *
  *                 Modification 0 and Release 2 Modification 0. *
  ****************************************************************
  * PROBLEM DESCRIPTION: When putting a message from an ASCII    *
  *                      environment to an alias queue which     *
  *                      resolves to a topic, if the output-only *
  *                      MQPMO fields ResolvedQName or           *
  *                      ResolvedQMgrName contain certain ASCII  *
  *                      characters, then CSQX053E and CSQX541E  *
  *                      messages may be issued in the CHIN. The *
  *                      CSQX053E message is accompanied by an   *
  *                      FFST.                                   *
  *                                                              *
  *                      In this scenario the application will   *
  *                      also receive an MQRC 2009               *
  *                      (MQRC_CONNECTION_BROKEN). Depending on  *
  *                      the syncpoint options on the MQPUT, the *
  *                      publish to the topic may or may not     *
  *                      have succeeded.                         *
  ****************************************************************
  The problem occurs when converting the MQPMO character fields
  ResolvedQName and ResolvedQMgrName. Since they are output-only
  fields, they are not converted to the QMGR CCSID before the
  MQPUT, instead only being converted to the client CCSID after
  they have been populated by the MQPUT.
  
  When the MQPUT is to an alias queue which resolves to a topic,
  these fields do not get populated, meaning that they will be
  interpreted as EBCDIC characters for the conversion back to
  ASCII. Depending on the original ASCII characters present in
  these fields, this conversion may fail.
  

Problem conclusion

• The code has been changed to treat the conversion of the MQPMO
  output-only fields correctly when putting to an alias queue to a
  topic.
  

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:

  UI72878 UI72879 UI72880

Modules/Macros

• CMQXRSRV
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R000 PSY UI72878

     UP21/01/28 P F101

• R100 PSY UI72879

     UP21/01/28 P F101

• R200 PSY UI72880

     UP21/01/28 P F101

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.