PH69044: RELATED TO PH65348 MQ ISSUES CSQX112E CSQXDISP DISPATCHER PROCESS ERROR, TCB=X 26/02/06PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• MQ issues CSQXDISP DISPATCHER PROCESS ERROR, TCB=x, abnormally
  terminating the channel with CSQX599E. Channel limits may be
  exceeded indicated by CSQX014E CSQXSRSP LISTENER EXCEEDED
  CHANNEL LIMIT, TRPTYPE=trptype. The CHINIT abends with ABN=
  0C4-00000011,LOC=CSQXBNTM.????????+00C96. In the APAR'd case the
  failing code is in CMQZUTRA at offset x692. Development finds
  this occurs even with the PTF UO02826 already APPLIED, which
  PH65348 intended to fix. That original problem was an
  xtr_data_zos trace point in zutParseTraceRouteHeader. This
  function is included in CSECTs CMQZUTRA and CSQXZUTR. CMQZUTRA
  is part of QMGR LMOD CSQTOPLM. CSQXZUTR is part of CHIN LMODs
  CSQXRCTL and CSQXSUPR. The problem here is that when the fix for
  UO02826 was built, it only included the QMGR CSECT CMQZUTRA.
  This results in the problem still existing for calls to
  zutParseTraceRouteHeader in CSQXZUTR, which is the version used
  by the CHIN.
  

Local fix

• Disable MQ CHINIT trace. Depending on how CHINIT trace is
  started, users may also need to disable TRACE(CHINIT) TNO(0)
  (i.e. if TRAXSTR=YES is configured).
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 4 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: When processing a trace route message   *
  *                      with CHINIT trace enabled, it is        *
  *                      possible for an S0C4 abend to occur in  *
  *                      the channel initiator.                  *
  ****************************************************************
  The fix for APAR PH65348 corrected a trace point that was
  causing abends when CHINIT trace was enabled. However, the fix
  was only applied to the queue manager code. The channel
  initiator uses a separate copy of this code which was not
  included in the fix. As a result, the problem continued to occur
  in the channel initiator when processing trace route messages
  with CHINIT trace enabled.
  

Problem conclusion

• The fix from PH65348 has been applied to the channel initiator
  version of the code.
  

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:

  UO06724

Modules/Macros

• CMQZUTRA CSQXZUTR
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R400 PSY UO06724

     UP26/02/14 P F602 {

Fix is available

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