PM84581: D3P2,ABND=04E-00E2000F,U=CICSUSR ,M=C9 ,C=101.DDIS-DSNLZRPA, DISTRBUTED,LOC=DSNLZRTM.DSNSVSFB+0858

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• DB2DDF DB2DRDA DB2TERM defect pm84581 dpm84581
  DB2 V10 CM abended with RC00D94001. A dump was generated
  with this title:
  
  ABND=04E-00E2000F,U=CICSUSR ,M=C9
  ,C=101.DDIS-DSNLZRPA,DISTRBUTED,LOC=DSNLZRTM.DSNSVSFB+0858
  *******************************************************
  Additional Symptoms and Keywords:
   ABEND04E AB04E S004E 04E
    04E-00E20006 00E20006 RC00E20006
     DSNLZRTM.DSNSVBK DSNLZRTM DSNSVBK +096A
    04E-00E2000F 00E2000F RC00E2000F
     DSNLZRTM.DSNSVSFB DSNLZRTM DSNSVSFB+0858 DSNSVSFB +0858
   DSNV086E MSGDSNV086E 00D94001 RC00D94001
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All Distributed Data Facility (DDF) users.   *
  ****************************************************************
  * PROBLEM DESCRIPTION: The following intermittent abends are   *
  *                      reported:                               *
  *                      o 04E-00E20006 DSNLZRTM.DSNSVBK +096A   *
  *                        or various other offsets (V9).        *
  *                      o 04E-00E2000F DSNLZRTM.DSNSVSFB+0858   *
  *                        or various other offsets (V10).       *
  *                      In either case, DB2 will likely         *
  *                      abnormally terminate with message       *
  *                      DSNV086E and reason 00D94001.           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A DB2 for z/OS allied thread happened to be abnormally
  terminated, in this case via a U0999-00000000 abend, while
  CSECT DSNLZRTM was in the process of freeing DDF related
  storage.  As a result of the abend, the allied thread enters
  abort processing but a residual pointer value causes the
  storage to be freed again.  The erroneous double free of
  the storage is detected in the form of an abend 04E-00E20006
  DSNLZRTM.DSNSVBK (V9) or 04E-00E2000F DSNLZRTM.DSNSVSFB (V10).
  The abend during abort processing causes the subsystem to be
  terminated with message DSNV086E and reason code 00D94001.
  

Problem conclusion

• DB2 has been changed to anticipate that its processing may be
  interrupted and hence clear pointer references to its storage
  as the storage is being freed.  This ensures that a free of the
  storage cannot be repeated if processing is interrupted.
  

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:

  UK93178 UK93179

Modules/Macros

•    DSNLXCMT DSNLXRCL DSNLXRDT DSNLXROP DSNLXRSQ
  DSNLXRUW DSNLZRTM
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RA10 PSY UK93178

     UP13/04/20 P F304

• R910 PSY UK93179

     UP13/04/20 P F304

Fix is available

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