PM15044: ABEND04E 00E20006 LOC=DSNIWKFD DSNSVBK OFFSET098E CUB ALREADY FREED WHEN DELETE TEMPORARY FILE - SMCOVERLAY

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• It fails to maintain CUBWRDRP when delete a temporary file. Then
  it may cause main and extended workfile cub chain messed up
  later. Reader cub of the main workfile may point to a freed
  reader cub for extend workfile. So it would abend DSNSVBK +098E
  when delete the main temporary file.
  Additional Symptoms:
  - ABEND0C4 DSNB1OFA at UK25665 offset 0C1E
  - Abend0C4 in DSNB1CPS + 706 and abend0C4 in DSNB1RTR + 41C
    because a PBA + x'40' is overlaid due to using an already free
    CUB (mistakenly still in CUB extension chain)"
  SMCOVERLAY
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All DB2 V8 for z/OS users of workfiles or    *
  *                 created global temporary tables (CGTTs)      *
  ****************************************************************
  * PROBLEM DESCRIPTION: RC00E20006 DSNIWKFD.DSNSVBK +098E       *
  *                      during workfile or CGTT processing      *
  *                                                              *
  *                      Other symptoms possible                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When processing workfiles or CGTTs that span more than a single
  workfile table space and have reader CUBs defined on them, the
  chaining of the reader CUBs which represent the extensions was
  not properly performed.
  

Problem conclusion

• Code is changed to properly chain workfile extension reader
  CUBs.
  
  Additional keywords: SQLCGTT
  

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:

  UK59901

Modules/Macros

• DSNIWKFD
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• R810 PSY UK59901

     UP10/09/08 P F009

Fix is available

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