PI98974: CPSM CMAS IS ISOLATED AFTER BEING RECYCLED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• You run CPSM and recycle a non-MP CMAS. When the CMAS is
  started again, it gets removed from the CICSplex and becomes
  isolated.
  .
  This is indicated by following message:
  .
  +EYUCP0023E A communications failure has occurred while
              performing Repository Synchronization with CMAS.
              That CMAS is being isolated.
  .
  This problem is caused by a timing issue. As part of the
  automatic DREP synchronization process between the MP CMAS xxxx
  and non-MP CMAS yyyy, the non-MP CMAS needed to be deleted and
  re-added to the CICSplex by the MP CMAS.
  .
  It was found that during this automatic delete-and-re-add
  process, MASes joined the non-MP CMAS which prevented the
  CICSplex from  being re-added. This meant that the CMAS had
  been deleted from the CICSplex and resulted in its isolation.
  

Local fix

• not available
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of CPSM V5.2, V5.3 and V5.4.       *
  ****************************************************************
  * PROBLEM DESCRIPTION: If a CMAS is going through automatic    *
  *                      plex delete/re-add processing as        *
  *                      part of DREP synchronization, it may    *
  *                      become isolated and message             *
  *                      EYUCP0033I issued: Disconnect           *
  *                      requested for CMAS xxxxxxxx.            *
  *                      Reason: CMAS isolated.                  *
  ****************************************************************
  * RECOMMENDATION: After applying the PTF that resolves this    *
  *                 APAR, restart all CMASes in the CICSplex.    *
  *                 Note that the CMAS restarts do not have to   *
  *                 occur at the same time.                      *
  ****************************************************************
  During DREP synchronisation, a CMAS may need to be removed
  from the plex and re-added if it is not possible to update its
  copy of the DREP due to it being too out-of-date from the MP
  CMAS.  This plex delete/re-add processing is automatically
  initiated by the MP CMAS.
  There is a timing hole during this processing in which MASes
  may connect to the CMAS in the middle of the CMAS's plex
  deletion process but before the deletion process completes and
  the re-add process begins.  If this occurs, then the CMAS
  cannot be re-added to the plex because MASes are active.
  When diagnosing this problem, it was found that an abend could
  occur in module EYU0CWTU when COMS level 26 tracing was
  active.
  
  KEYWORDS:
  EYU0CWTU ABEND/S0C4 CWTU 0C4 OFFSET 19C
  

Problem conclusion

• CPSM has been modified to remove a CMAS during its deletion
  process from the ESSS sooner so that MASes are not able to
  join to it during the automatic delete/re-add process which
  may take place as part of DREP synchronization.
  When a CMAS reads its DREP, it checks to make sure that it is
  not currently being deleted from the plex and takes the
  appropriate error logic if it is.
  Module EYU0CWTU has also been modified to stop the
  aforementioned abend from occurring when COMS level 26 trace
  is active.
  

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:

  UI57424 UI57445 UI57446

Modules/Macros

• EYU0CCPD EYU0CWTU EYU0XDGR
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R00M PSY UI57445

     UP18/07/26 P F807

• R10M PSY UI57446

     UP18/07/26 P F807

• R90M PSY UI57424

     UP18/07/27 P F807

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.