PH31304: MQ Z/OS V9. SENDER CHANNEL NOT CONVERTING PROPERLY THE ENCODING

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Sender qmgr on z/OS and the receiver qmgr on another platform.
  
  If receiving qmgrs do not support conversion between source
  CCSID and target CCSID, but z/OS qmgrs do, the conversion is
  being done on the sender end.
  
  When converting data, character fields are converted between
  the source and target CCSID, but numeric fields are also
  converted between the source and target encoding.
  
  When a z/OS sender channel is responsible for conversion, the
  encoding is not being converted properly, causing the target
  qmgr to report an invalid encoding value.
  
  Where group messages are being sent over the channel, the
  invalid encoding stops the target qmgr from interpreting the
  MQMDE header correctly, so the group attributes of the message
  are not applied when the message is got from the target queue.
  

Local fix

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: Depending on the sender and receiver    *
  *                      QMGR CCSIDs, when using CONVERT(YES) on *
  *                      a sender channel to a little-endian     *
  *                      receiver, the MQMD.Encoding may not be  *
  *                      converted to a little-endian format.    *
  *                                                              *
  *                      This can occur when using message       *
  *                      grouping, since version 2 MQMD are      *
  *                      stored internally as a version 1 MQMD   *
  *                      with an MQMDE header.                   *
  ****************************************************************
  In most cases, the conversion of a message is done by the
  receiver QMGR. If the receiver QMGR cannot perform the
  conversion then the message will be converted by the sender QMGR
  before being sent. A defect in this conversion logic can result
  in the MQMD.Encoding not being converted properly when sending
  messages to a little-endian receiver.
  

Problem conclusion

• The conversion logic has been changed to correctly convert the
  MQMD.Encoding for outbound messages.
  

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:

  UI73050 UI73051 UI73052

Modules/Macros

• CSQXRMTR
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R000 PSY UI73050

     UP21/01/28 P F101

• R100 PSY UI73052

     UP21/01/28 P F101

• R200 PSY UI73051

     UP21/01/28 P F101

Fix is available

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