PI71597: CMAS ABEND ASRA S0C4 IN METHOD EYU0WMAA, TRANID WMWD

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• After applying the PTF for one of the following APARs
  .
  PI60881:
    4.1 UI39171
    4.2 UI39172
  .
  PI60885:
    5.1 UI39173
    5.2 UI39174
  .
  PI60887:
    5.3 UI39175
  .
  You begin having S0C4 abends or possible storage corruption.
  For the S0C4s, you may see messages similar to the following:
  .
  EYUTS0003I <applid> Topology Connect for <masname> Complete -
                      APPLID(<masname>) CICSplex(<plexname>).
  DFHDU0205  <applid> A SYSTEM DUMP FOR DUMPCODE: AP0001  , WAS
                      SUPPRESSED BY THE DUMP TABLE OPTION FOR
                      THIS DUMPCODE
  EYUXL0900I   Starting Environment Recovery
  EYUXL0905E <applid> ASRA IN WMAA, OFFSET 00000492
                      PSW=07851000 B0363432
  EYUXL0905E INTC=0004 ILC=6 TXCP=00236408 SCODE=S00C4
                       TRAN=WMWD TASK=0012345
  EYUXL0905E Methods=WMAA,WMWD,XLOP
  .
  Note that the EYUTS0003I may instead be a EYUTS0001I for a
  Topology JOIN.
  .
  An important part of the above messages is that the PSW bits
  16-17 (5th digit, 1st and 2nd bits) are '00'. These bits
  indicate whether we are in Access Register mode or not. When
  they are '00', or "Primary-space mode," we are not.
  .
  Formatting the dump using
  .
     VERBX EYU9D### 'TRC,JOB=cmasname'
  .
  you will see an exception trace entry for tranid WMWD, in
  method WMAA.
  .
  The problem will not always occur.  It requires lost contact (
  LOSTCON ) for a target region, and for the CSYSDEF for the
  target region to indicate NO for the "Target region active at
  startup" attribute ( CSYSDEF_DYNROUTE ).  Lost contact can
  occur if the target region is active when its CMAS terminates.
  When the CMAS comes back, the error can occur.  The error can
  occur not only in the CMAS that the target region is connected
  to, but to all other CMASes that are active which manage any
  workload that is associated with the CICSplex that the target
  region is part of.
  
  .
  .
  Additional Symptom(s) Search Keyword(s): KIXREVxxx
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICSPlex SM V4R1M0 and V4R2M0 Users      *
  ****************************************************************
  * PROBLEM DESCRIPTION: Errors can occur after applying PTF     *
  *                      UI39171 (CPSM 4.1) or UI39172 (CPSM     *
  *                      4.2) for APAR PI60881.                  *
  *                                                              *
  *                      The errors seen include:                *
  *                                                              *
  *                      -  Abend ASRA/S0C4 in method EYU0WMAA   *
  *                         (WMAA) in a CMAS.                    *
  *                                                              *
  *                      -  Unpredictable results caused by an   *
  *                         overlay of CMAS region storage.      *
  *                                                              *
  *                      The errors can occur when a CPSM WLM    *
  *                      target region which is in QUIESCED      *
  *                      state, recovers from a lost connection  *
  *                      status (LOSTCON) for a CPSM WLM         *
  *                      workload.                               *
  *                                                              *
  *                      -  LOSTCON occurs when the CMAS an      *
  *                         active target region is connected to *
  *                         either terminates or loses           *
  *                         connection to other CMASes that      *
  *                         manage CPSM workloads associated     *
  *                         with the CICSplex the target region  *
  *                         is part of.                          *
  *                                                              *
  *                         When LOSTCON occurs for a target     *
  *                         region, its WLMAWAOR record, as      *
  *                         retrieved by a CPSM API, WUI or      *
  *                         Explorer request, will indicate      *
  *                         LOSTCON for the Target region        *
  *                         contact status (WLMAWAOR_CON_STATUS) *
  *                         attribute.  If the target region     *
  *                         is not in a LOSTCON condition,       *
  *                         the attribute will indicate N_A.     *
  *                                                              *
  *                      -  LOSTCON recovery occurs when the     *
  *                         target region's CMAS re-connects to  *
  *                         the other CMASes in the network.     *
  *                                                              *
  *                      If the error is going to occur, it will *
  *                      occur at LOSTCON recovery, and can      *
  *                      occur in all CMASes to which the target *
  *                      region was in a LOSTCON state.          *
  ****************************************************************
  * RECOMMENDATION: After applying the PTF that resolves this    *
  *                 APAR, all CMASes must be restarted.  Note    *
  *                 that the restarts do not need to occur at    *
  *                 the same time.                               *
  ****************************************************************
  When WMAA is called during recovery of a LOSTCON condition for a
  quiesced target region, code added for APAR PI60881 causes it to
  turn off access register mode (ARmode) and then try to access
  the target region's EYURWAOR control block.  Since the EYURWAOR
  resides in the WLM data cache, whose access requires being in
  ARmode, WMAA will actually be accessing an address in the CMAS's
  region storage:
  
  -  If the storage in the CMAS region is not accessible, an
     ASRA/S0C4 abend is likely to occur.
  
  -  If the storage in the CMAS region is accessible, then an
     overlay of that storage is likely to occur.
  

Problem conclusion

• WMAA has been updated to not exit ARmode before attempting to
  access a quiesced target region's EYURWAOR control block, when
  called to process LOSTCON recovery for the target region.
  

Temporary fix

•             *********
              * HIPER *
              *********
  FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

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

  PI71558

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

  UI42310 UI42311

Modules/Macros

• EYU0TIST EYU0TSNC EYU0WMAA EYU0WMQU EYU0WMQW EYU0WMTJ EYU9TSRU
  EYU9TSR3 EYU9TSR4
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R60M PSY UI42310

     UP16/11/09 P F611 ­

• R70M PSY UI42311

     UP16/11/09 P F611 ­

Fix is available

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