PK85472: HD POINTER CHECKER PASSES INCORRECT PARAMETER TO SEGMENT/EDIT COMPRESSION ROUTINE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When HD Pointer Checker calls a segment/edit compression routine
  in a HD Pointer Checker stand alone job,  HD Pointer Checker
  sets incorrect value in the parameter.
  This causes unexpected result in the segment/edit compression
  routine, for example, user abend or system abend.
  This problem happens when the database is HALDB.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: IBM IMS High Performance Pointer Checker for *
  *                 z/OS Version 3 Release 1 (FMID=HPC2310)      *
  *                 users who run HD Pointer Checker stand alone *
  *                 (FABPMAIN) job to validate pointers.         *
  ****************************************************************
  * PROBLEM DESCRIPTION: HD Pointer Checker (HDPC) causes some   *
  *                      problems when the database is HIDAM,    *
  *                      PHIDAM, or having secondary index.      *
  *                                                              *
  *                      The problems are:                       *
  *                      - HDPC passes incorrect                 *
  *                        parameter to a Segment/Edit           *
  *                        Compression Exit routine. Register 2  *
  *                        should contain an address of segment  *
  *                        data, but it does not contain correct *
  *                        data. It can cause unexpected result  *
  *                        in the exit routine, for example,     *
  *                        user abend, system abend, or error    *
  *                        messages.                             *
  *                      - HDPC detects false pointer errors.    *
  *                        It issues MSGFABP0326E, MSGFABP0327E, *
  *                        or MSGFABP2022E in the report, but    *
  *                        the database actually has no error.   *
  *                                                              *
  *                      The problems happen when index source   *
  *                      segments are variable and some of them  *
  *                      are split into data portion and prefix  *
  *                      portion.                                *
  ****************************************************************
  * RECOMMENDATION: Apply the maintenance for this APAR.         *
  ****************************************************************
  When index source segment is split, HDPC refers an obsolete I/O
  buffer area. But, the area is already overridden by another
  data. This process causes the above errors.
  

Problem conclusion

• The following modules are corrected not to refer the obsolete
  I/O buffer, and process the recent data correctly:
  FABPSDA0, FABPPSDA, FABPSTAP, FABPSHI0, FABPHSDA, FABPHSHI
  

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:

  UK46626

Modules/Macros

•    FABPHSDA FABPHSHI FABPPSDA FABPSDA0 FABPSHI0
  FABPSTAP
  

Fix information

• Fixed component name

  IMS POINTER CHE

• Fixed component ID

  5655E0900

Applicable component levels

• R310 PSY UK46626

     UP09/05/20 P F905

Fix is available

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