PH42410: CMAS IS ATTEMPTING TO PERFORM A TOPOLOGY CONNECT, AND THIS IS INTERRUPTED BY THE MAS ADDRESS SPACE TERMINATING.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• CMAS is attempting to perform a topology connect, and this is
  interrupted by the MAS address space terminating. The result is
  that the list token in CSDB_CPSM_ISYSRES is cleared, but the
  state flag CSDB_SOPR_SYNCISRL remains set on. When the MAS is
  restarted, if BAS has no need to install resources again (for
  example if this is a CICS Automatic restart, and the BAS install
  option for the MAS is COLDONLY), then an XCLR list remove
  operation is attempted against an empty list. The CICS region
  remains active, but without being connected to CPSM as a MAS.
  Attempts to perform CPSM dynamic routing will abend.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CPSM users                               *
  ****************************************************************
  * PROBLEM DESCRIPTION: If during the warm restart of a CMAS    *
  *                      an attached MAS is cancelled then,      *
  *                      depending on the exact point in time    *
  *                      of the cancel, the MAS can be left      *
  *                      active in the workload. Either of       *
  *                      messages EYUTS0025I or EYUTS0002E can   *
  *                      be produced at time of the cancel.      *
  *                                                              *
  *                      The first restart of the MAS fails      *
  *                      because it is already active in the     *
  *                      workload. Subsequent restarts connect   *
  *                      OK.                                     *
  ****************************************************************
  * RECOMMENDATION: Apply the fix to all CMASes. It does not     *
  *                 need to be applied to all CMASes at the      *
  *                 same time.                                   *
  ****************************************************************
  During the warm restart of a CMAS an attached MAS is cancelled.
  The MAS is removed from the CICSplex but a CICS Stop event
  (EMASSTOP) is not performed. One result of this is that the MAS
  would not be removed as an active target for a workload, even
  though the CICS system is no longer active.
  
  Messages EYUTS0025I or EYUTS0002E can be produced at the time
  of the cancel.
  
  The first attempt to restart the MAS will fail to connect to
  the CMAS. Subsequent connects work correctly.
  

Problem conclusion

• The Topology Connect processor EYU0TSSC (TSSC) has been
  modified when executing to reconnect to a MAS as a result of a
  CMAS Warm restart. If the MAS has been cancelled during the
  CMAS restart, then TSSC will initiate a full CICS Stop
  (EMASSTOP) event.
  
  This allows the MAS to connect back at the first attempt.
  

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:

  UI79321 UI79322 UI79323

Modules/Macros

• EYU0TSSC EYU0TSSE
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R10M PSY UI79323

     UP22/02/17 P F202

• R20M PSY UI79322

     UP22/02/16 P F202

• R30M PSY UI79321

     UP22/02/16 P F202

Fix is available

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