PH12717: MQ FOR Z/OS: ABEND0C4-00000038 IN CSQJOFF6 AFTER ARCHIVE LOG CANCEL OFFLOAD

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The ARCHIVE LOG CANCEL OFFLOAD command was issued. An ABEND
  5C6-00E50070 occurred as expected.
  
  During retry logic an error in the recovery routines resulted
  in GR6 being incorrectly restored with a non-zero value in the
  first 4 bytes and the EB address in the 2nd half of the
  register. Following the retry, trace processing was called and
  switched to amode(64). This resulted in the 0C4 abend when an
  attempt was made to reference the EB using GR6, due to the
  unexpected values in the high half of the register.
  
  Additional Symptom(s) Search Keyword(s):
  LOC=CSQWDLD2.CSQWVCOL+00000090
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 8       *
  *                 Release 0 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend 0C4-38 occurs in CSQJOFF6 after   *
  *                      ARCHIVE LOG CANCEL OFFLOAD is issued.   *
  ****************************************************************
  While processing an ARCHIVE LOG CANCEL OFFLOAD command, the
  running log offload task was abended by the command. At the
  point that the abend took effect, the task was in dynamic
  allocation (SVC99) code outside of MQ control, and GR(6) no
  longer pointed at the EB.
  During recovery for the abend, R6 was restored so that it
  pointed to the EB again, however the high half of the register
  still contained the value from the time of the abend.
  Following recovery, execution switched to amode(64) at which
  point the residual/unexpected value in the high half of GR6
  caused any attempt to reference the EB to fail with the
  reported abend.
  

Problem conclusion

• CSQ9SCN9 has been changed to specify that retry occurs with
  GR6 set to the EB address.
  

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:

  PH17532 UI65886

Modules/Macros

• CSQ9SCN9
  

Fix information

• Fixed component name

  IBM MQ Z/OS V8

• Fixed component ID

  5655W9700

Applicable component levels

• R000 PSY UI65886

     UP19/11/27 P F911

Fix is available

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