PM71009: FORWARD RECOVERY OF UTS MEMBER CLUSTER SPACE MAP PAGE MAY CAUSE ITS OR OTHER PAGE'S CORRUPTION.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Dump Title: DMP3,ABND=04E-00C90101,U=SYSOPR  ,M=N  ,C=101.DMC
  -DSNIB   ,M=DSNTFRCV,LOC=DSNIDM  .DSNISMCP:5069
  Auto GRECP recovery issued ABEND04E RC00C90101 DSNISMCP:5069
  because a page was overlaid.
  _9A64000   00C9C1BC   2C6C1800   0CB21480   00DE0EF4
  _9A64010   00007600   04002100   0001C2A0   160B5D5F
  _9A64020   0A20260A   DE6D99BF   70006022   01703200
                           |
  _9A641E0   000032C2   2100000F   C2A0160B   5D5F0A20
             ******** should be 70480400
  This overlay was done by a redo of a UTS member cluster space
  map page's segment allocation log.
  0126663FB9DA  TYPE(       REDO )  URID(0126663E411E)
        LRSN(C9C1BC2C8FA4)  DBID(0E0D)  OBID(0002)  PAGE(000CB494)
        SUBTYPE(SEGMENT ALLOCATION/DEALLOCATION)  CLR(NO)
        PROCNAME(DSNISGNS)
  *LG** 080E0D00 02000CB4 940130C1 BC2C8FA2 4500
  0000  000E0007 00914000 00000000 0380000B 000451E0 00000032 C2
                                                ****
  The offset to the changed data was incorrect and caused the
  overlay.
  .
  UTS member cluster doesn't maintain the segment chain.
  But mistakenly generated the redo log to update the segment
  chain although the segment chain hadn't been updated in the
  segment allocation process.
  The incorrect redo log may cause a problem during forward
  recovery.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: DB2 10 for z/OS users of UTS MEMBER CLUSTER  *
  *                 table spaces.                                *
  ****************************************************************
  * PROBLEM DESCRIPTION: ABND04E RC00C90101 DSNISMCP ERQUAL5069. *
  *                      Other symptoms related to storage       *
  *                      overlays are possible.                  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  For table spaces defined as MEMBER CLUSTER, an invalid log
  record was created for segment chain allocation. For any forward
  recovery process, this invalid log record can cause overlays
  in other areas of DB2 storage. For member cluster objects the
  segment chain is not maintained and so this log record should
  not have been created in the first place.
  

Problem conclusion

• DB2 code has been corrected to avoid creating the incorrect
  segment chaining log record for UTS MEMBER CLUSTER objects.
  

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:

  UK82303

Modules/Macros

• DSNISGNS
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RA10 PSY UK82303

     UP12/10/17 P F210

Fix is available

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