PK91144: DB2 TERMINATED MSGDSNV086E RC00D93001 AFTER NUMEROUS ABEND04E RC00E2000E TRYING TO GET STORAGE OUT OF ADMF IRLM SUBPOOL

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• DB2 terminated with DSNV086E REASON=00D93001 after numerous
  04E-00E2000E abends from various components trying to get
  storage out of the ADMF IRLM SUBPOOL.
  
  DB2OVRLAY/K
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All DB2 V9 users                             *
  ****************************************************************
  * PROBLEM DESCRIPTION: ABEND04F DB2 subsystem termination      *
  *                      occurred when the critical DB2 agent    *
  *                      encountered 04E-RC00E2000E abend in     *
  *                      DSNSFBK while attempting to get         *
  *                      storage from a fixed block pool.        *
  *                      This occurred after many thread abends  *
  *                      from the same overlay.                  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Storage overlays can result in fixed block control information
  being invalid.  When a caller requests a fixed block, some
  validation is done to see if the block is correct. If the
  overlay occurs so that the free chain is broken and points to
  invalid range or offset, the abend occurs.  If the abending
  thread is a critical DB2 agent, then DB2 subsystem will
  terminate ABEND04F, else the thread terminates with RC00E2000E.
  

Problem conclusion

• This apar addresses getting multiple abends for the same
  overlaid free chain pointer, prior to DB2 termination.
  The bad free chain entry will be set to zero in all
  cases to prevent further abends due to the bad pointer and the
  segment marked as damaged.  If it is a critical DB2 agent,
  DB2 will still terminate with the abend04F.  If it is a normal
  thread, the agent will be abended with the existing logic for
  RC00E2000E. A dump will be requested in both cases to try to
  identify how the storage was overlaid.  This apar does NOT FIX
  the root cause of the overlay as the source was not identified.
  

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:

  UK49775

Modules/Macros

• DSNDSHB  DSNSFBK  DSNSVSFB
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• R910 PSY UK49775

     UP09/09/17 P F909

Fix is available

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