OA45765: UNEXPECTED ERROR AT ATRSMSFG +1EF0

APAR status

• Closed as fixed if next.

Error description

• Dump Title: COMPON=ATR,COMPID=SCRRS,ISSUER=ATRBMDUM,
  MODULE=ATRSMSFG+1EF0 UNEXPECTED ERROR
  
  The error occurred in routine CBVError.  This was after
  detecting that the SHE control block had been freed, showing
  SHE_Eyecatcher ATRSCshe
  
  The following message is issued when detecting a freed SHE:
  
  ATR246I RRS HAS DETECTED A SHE CONTROL BLOCK ERROR -
          UNEXPECTED ERROR DUMP REQUESTED
  
  This problem occured while processing Subordinate Forget.
  Investigation showed that there were multiple subordinate URs on
  the system going through syncpoint termination.  The processing
  path for this subordinate UR in ATRSMSFG determined that SHE was
  complete. Then syncpoint for another subordinate UR in ATRTMARI
  found that the SHE was marked complete and freed it.  ATRSMSFG
  attempted to access the SHE again after it had been freed,
  leading to the UE
  
  Additional Symptoms:
  The Unexpected Error may occur later in subordinate syncpoint
  forget, with dump title
  Dump Title:  COMPON=ATR,COMPID=SCRRS,ISSUER=ATRBMDUM,
               MODULE=ATRXMSCB+D28A UNEXPECTED ERROR
  .
  .
  Another error that can be seen because of this timing window are
  dumps for:
  .
  COMPON=ATR,COMPID=SCRRS,ISSUER=ATRBMDUM,MODULE=ATRXMSCT+4D54
  UNEXPECTED ERROR.......
  .
  and
  .
  COMPON=ATR,COMPID=SCRRS,ISSUER=ATRBMDUM,MODULE=ATRXMSCT+4B88
  UNEXPECTED ERROR.......
  .
  The above two dumps were taken because of the same timing window
  that exists between ATRXMSCT and ATRTMARI. There is no real
  impact, aside from the dumps being taken.
  
  Additional potential UE dumps accompanied with ATR246I:
  
  ATRTMARI HBB7790+A63C
  
  ATRSMSPT UA70427+160A
  
  ATRSMSFG UA71504+235A
  
  ATRTMARI HBB7790+AD4A
  ATRTMARI HBB77A0+ADDA
  
  ATRXMSCB HBB7790+D486
  ATRXMSCB HBB77A0+D456
  
  
  Known Environment
  Sysplex Cascaded transaction processing with more than 1
  subordinate URs cascaded on a system.
  
  Known Impact
  None.  The SHE is freed during syncpoint forget processing.
  Each subordinate UR completes and cleans up successfully.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of RRS at HBB7705 and above that       *
  *                 are running COMPLEX Sysplex Cascaded         *
  *                 Transactions                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: UNEXPECTED ERROR dump in RRS module     *
  *                      ATRSMSFG during the internal clean up   *
  *                      of a highly complex Sysplex Cascaded    *
  *                      Transaction.                            *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The internal clean up processing by RRS for a Sysplex Cascaded
  Transaction is incorrectly trying to reference a control block
  that has already been freed which is being detected and reported
  (via diagnostic code which generates the UNEXPECTED ERROR dump).
  

Problem conclusion

Temporary fix

Comments

• This APAR is being closed FIN with the agreement from the
  customer and a fix will be developed and ship in a future
  release of the product.
  

APAR Information

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

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

Fix information

Applicable component levels

• R770 PSN

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