PM80263: ABEND04E RC00E2000C IN DSNSVSVB OFFSET0AC2 CAUSED BY INFINITE LOOP IN SQL CONDITION HANLDER

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• This out-of-storage ABEND occurred because many copies of
  internal control block 'DCLN' were allocated to processentries
  and exits of an SQL condition handler (over 100+ million entry/
  exits due to an infinite loop). These control blocks were not
  leaked, but due to high number of entries and exits, the
  processing thread eventually consumed its available storage and
  ABENDed. This APAR will change DB2 code to better manage the
  storage used by the 'DCLN' internal control block.
  
  Please note that out-of-storage ABENDs are still possible,
  especially in long-running threads.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All DB2 9 and 10 users of SQL condition      *
  *                 handlers.                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: ABEND04E RC00E2000C IN DSNSVSVB +0AC2   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  DB2 SQL condition handler processing sometimes allocates
  internal control blocks to maintain certain diagnostic
  information associated with the condition that caused the
  handler to be invoked.
  
  These control blocks are only freed upon exit of a stored
  procedure.  This means that if an application had excessive
  entries into SQL condition handlers (e.g. 100+ million),
  the allocation of these internal control blocks may cause
  out-of-storage ABEND conditions, such as the symptom ABEND.
  

Problem conclusion

• DB2 code has been modified to free the noted control blocks at
  the exit of SQL condition handler, instead of at the end of the
  stored procedure.
  
  Additional Keywords: SQLSTORAGE DB2STGLK/K
  

Temporary fix

• * HIPER *
  *********
  AM80263
  

Comments

APAR Information

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

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

  UK92517 UK92518

Modules/Macros

• DSNXRSPL
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RA10 PSY UK92517

     UP13/03/29 P F303

• R910 PSY UK92518

     UP13/03/29 P F303

Fix is available

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