OA59381: SMSVSAM BROKEN INDEX WHILE PERFORMING MULTIPLE DELETES AT SAME TIME WITH CARECLAIM ACTIVE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• If multiple mass deletes are issued against a RLS data set with
  CARECLAIM active at the same time there is a timing window where
  CARECLAIM may corrupt the 2nd level index record causing request
  to loop.
  
  An examine of the data set will show following errors:
  INDEXTEST:
  IDC11726I CI ON CURRENT LEVEL NOT POINTED TO BY NEXT LEVEL
  
  DATATEST:
  IDC11772I HORIZONTAL POINTER CHAIN LOOP
  
  This fix will prevent the data set corruption and apar OA59403
  will add protection against the loop caused by processing with a
  corrupted index.
  
  Additional keywords:
  DIWA Loop
  RLSLOOP RLSCPU
  SMSVSAM RLS VSAMRLS DF122
  RLSPSP/K
  

Local fix

• BYPASS/CIRCUMVENTION:
  A close of file and/or shutdown of regions using it
  
  RECOVERY ACTION:
  Rebuild index, or recover data set
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL VSAM RLS USERS.                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * INDEX CORRUPTION OCCURS IN A KSDS AFTER                      *
  * PROCESSING SIMULTANEOUS CA RECLAIMS.                         *
  * EXAMINE ERROR MSGIDC11726I AND/OR                            *
  * IDC11774I REPORTS THE DAMAGE OR BREAK.                       *
  * SEQUENTIAL REQUESTS DIRECTED AT THE                          *
  * CORRUPT FILE MAY RESULT IN INFINITE                          *
  * LOOPING.                                                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A SMALL TIMING WINDOW EXISTS WHEREIN IF 2 CA RECLAIMS ARE
  OCCURRING SIMULTANEOUSLY IN THE SAME KSDS, AND THE 1ST 2ND LEVEL
  INDEX RECORD IS DIRECTLY PREVIOUS TO 2 2ND LEVEL INDEX RECORDS
  BEING RECLAIMED, THE HORIZONTAL POINTER OF THE 1ST 2ND LEVEL
  INDEX RECORD IS NOT UPDATED. THE RESULT IS INDEX COMPONENT
  CORRUPTION AND A BROKEN HORIZONTAL CHAIN.
  

Problem conclusion

• LOGIC IS CORRECTED TO ENSURE ALL UPDATES MADE TO INDEX RECORDS
  DURING CA RECLAIM ARE PROPERLY MADE.
  

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:

  UJ02619 UJ02620 UJ02654

Modules/Macros

• IDAVRSG0
  

Fix information

• Fixed component name

  VSAM REC LEV SH

• Fixed component ID

  5695DF122

Applicable component levels

• R240 PSY UJ02620

     UP20/05/19 P F005 ¢

• R230 PSY UJ02619

     UP20/05/19 P F005 ¢

• R220 PSY UJ02654

     UP20/05/19 P F005 ¢

Fix is available

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