PH22119: ABEND04E 00C90101 DSNISORT 5003

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ABEND04E RC00C90101 in DSNISORT ERQUAL5003 can occur in rare
  case under ISO(CS) bind.
  In this particular case customer was running in ISO(UR), so the
  chance to hit is increasing.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All Db2 users with queries using a                           *
  * data-partitioned secondary index (DPSI).                     *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * ABEND04E RC00C90101                                          *
  * LOC=DSNIDM.DSNISORT ERQUAL5003                               *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply corrective PTF when available                          *
  ****************************************************************
  When a reader without holding a lock (e.g. ISO(UR) or ISO(CS))
  uses DPSI to retrieve and order data by DPSI key columns, the
  keys may be updated by another thread. When Db2 detects a
  change in the key, Db2 will skip the row and fetch the next
  one based on the order of the key. However, Db2 incorrectly
  uses the changed key instead of the previous key which has
  the correct position to perform the next fetch. This causes
  Db2 to abend in a failed sanity check when Db2 detects the
  retrieved data is out of order during the fetch-next
  processing.
  

Problem conclusion

• Db2 DPSI data retrieval logic has been fixed to preserve the
  previous key position for fetch-next processing when Db2 skips
  a row due to a change in the key values.
  

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:

  UI68252 UI68253

Modules/Macros

• DSNIFDPO
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RB10 PSY UI68252

     UP20/03/14 P F003

• RC10 PSY UI68253

     UP20/03/14 P F003

Fix is available

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