PI30586: CICS CKTI TRANSACTION ABENDED ASPQ AFTER MQ-TRIGGERED TRANS ABENDED AZIG

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• You receive the following messages:
  DFHMQ0119D CICS detected an IRC failure.
             Cannot start transaction xxxx.
  
  DFHZN2200  FREE IMPLICIT failed during syncpoint processing for
             session >xyz , remote system xxxxxxxx. Transid CKTI.
             The original abend code was AZIG.
  
  DFHAC2251  Transaction CKTI running program DFHMQTSK term ????
             has failed with abend ASPQ. Syncpoint commit
             processing has failed while communicating with a
             remote system.
  
  DFHDU0206I A transaction dump for dumpcode: AZIG was suppressed
             by the XDUREQ USER EXIT.
  
  DFHAC2236  Transaction xxxx abend AZIG in program xxxxxxxx term
             ????. Updates to local recoverable resources will be
             backed out.
  
  The CKTI task should not be ended by an ASPQ abend, and a
  change is needed to recovery manager to ensure that this is the
  case.
  
  When we do the SYNCPOINT in the CKTI code after an IRC timeout,
  the syncpoint manager program DFHSPP knows we have to backout
  rather than commit, so RM just sees a backout_uow.
  
  This proceeds as expected and encounters the IRC link which
  timed out so it calls DFHCRIU to PERFORM_COMMIT
  UOW_STATUS(BACKWARDS). This calls ZISP which attempts a FREE
  which fails and then a FREE_DETACH which does work. DFHCRIU
  then returns to RM saying RESPONSE(OK) ACCESSIBLE(YES)
  FORGET(YES) PASS(NO) ABEND(YES) - and it's the abend(yes) which
  then provokes RM to return its exception of
  remote_commit_abended and thus culminates in the ASPQ abend.
  
  The link is recovery_status(unnecessary), DFHCRIU manages to
  free_detach it (after a plain free does not work), but tells RM
  abend(yes) - thus the ASPQ.
  
  This APAR will stop DFHCRIU from telling RM abend(yes) in the
  case of recovery_status(unnecessary) and the FREE->FREE_DETACH
  working.
  
  
  Additional Symptom(s) Search Keyword(s): KIXREVCTC
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users                               *
  ****************************************************************
  * PROBLEM DESCRIPTION: CKTI abends ASPQ after a WMQ triggered  *
  *                      task abends AICG                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The CKTI task suffers an unhandled SYNCPOINT abend, forced by
  RM, even though the remote link which has timed out is defined
  as recovery_status(unnecessary), and has been free_detached
  successfully. A remote WMQ triggered task abends AICG because
  the remote session has timed out and this leads to the CKTI
  task abending ASPQ.
  

Problem conclusion

• DFHCRIU has been changed to instruct RM not to force an abend
  in this circumstance.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  PI31180 UI25119

Modules/Macros

• DFHCRIU  DFHMQTSK
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R700 PSY UI25119

     UP15/02/19 P F502

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.