PI60424: MQ MSTR ADDRESS SPACE RECEIVED ABEND=S026,REASON=08118001 WITH REASON=00C510AB

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• MQ MSTR asid abended.
  CSQV086E <ssid>  QUEUE MANAGER ABNORMAL TERMINATION
  REASON=00C510AB
  ABEND=S026,REASON=08118001,CONNECTOR HANG:
  CONNAME=<conname>,JOBNAME=<ssidMSTR>
  QUEUE MANAGER TERMINATION REQUESTED, REASON=00C510AB
  .
  The S026 abends are occurring when QMGR receives
  a disconnfail event for CSQx's connection to
  structure <structure> as a result of the RESET
  CFSTRUCT(<structure>) ACTION(FAIL) command
  (normally QMGR would have also disconnected and
  would not receive this event, however this does
  not appear to be the case here).
  
  During event processing, the QMGR compares the
  instance number of the structure with that in the
  admin structure, and as they are the same requests
  a shared ENQ on CSQx's connection to the admin
  structure.
  However CSQx holds this ENQ exclusively and will
  continue to do so until it disconnects from the
  admin structure (usually at qmgr shutdown), and
  so QMGR suspends without responding to the event.
  
  XCF detects that QMGR has not responded to the event,
  and after several minutes abends S026-08118001,
  followed several minutes later by S026-08118002
  which causes QMGR MSTR asid to terminate abnormally.
  .
  Additional Symptom(s) Search Keyword(s):
  .
  IXL041E CONNECTOR NAME: <structure> JOBNAME: ssidMSTR,
  HAS NOT RESPONDED TO THE DISCONNECTED/FAILED CONNECTION
  EVENT FOR SUBJECT CONNECTION: <conname>.
  DISCONNECT/FAILURE PROCESSING FOR STRUCTURE <structure>
  CANNOT CONTINUE.
  ..
  IXL040E CONNECTOR NAME: <structure>, JOBNAME: ssidMSTR,
  HAS NOT RESPONDED TO THE USER SYNC POINT EVENT.
  USER SYNC POINT PROCESSING
  
  FOR STRUCTURE <structure> CANNOT CONTINUE.
  
  ABEND026 ABENDS026 026 S026 S0026
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 8 *
  *                 Release 0 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: The command RESET CFSTRUCT('xx')        *
  *                      ACTION(FAIL) can cause other queue      *
  *                      managers in a QSG to hang.              *
  *                      This can result in error messages       *
  *                      IXL040E, IXL049E, IXL050I and abend     *
  *                      S026 reason 08118001 or 08110102,       *
  *                      followed by the queue manager           *
  *                      terminating with reason 00C510AB.       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When command RESET CFSTRUCT('xx') ACTION(FAIL) is executed in a
  member of a QSG that is not connected to structure 'XX' causes
  XCF and XES notification events that are not properly handled by
  the other queue managers in the QSG resulting in queue managers
  hanging without responding to XES events.
  
  When XES events are not responded to, abend S026 is generated
  and the XES connector hang resolution terminates the queue
  manager.
  

Problem conclusion

• The XCF and XES notifications properly force disconnects from
  failed application structures as requested by the RESET
  CFSTRUCT('XX') ACTION(FAIL) command without causing connector
  hang and XES abends.
  000Y
  CSQECLOS
  CSQEDSC1
  CSQESEX
  CSQESTE
  CSQESTFA
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  UI38667

Modules/Macros

• CSQECLOS CSQEDSC1 CSQESEX  CSQESTE  CSQESTFA
  

Fix information

• Fixed component name

  WMQ Z/OS 8

• Fixed component ID

  5655W9700

Applicable component levels

• R000 PSY UI38667

     UP16/07/06 P F607 ¢

Fix is available

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