OA39724: MEDIA MANAGER IO REQUEST IS REPORTED AS COMPLETE BEFORE ALL OF THE CIS PROCESSED.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• For a striped data set, media manager IO request is reported as
  complete before all of the CIs processed.   The data set must
  consist of 2 or more stripes and the IO request must read or
  update write a large number of discontiguous CIs (in excess of
  100 CIs).
  There is no data loss, rebuilding the index allows access
  to all the data.
  Other symptoms:
  ABEND04E RC00D10348,U=SYSOPR  ,M=?  ,C=101.RLMC-DSNJLGR
  ,M=DSNJRE01,LOC=DSNJL002.DSNJR005+070C can occur.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All DB2 R10 users who have DB2 table spaces  *
  *                 which are striped.                           *
  ****************************************************************
  * PROBLEM DESCRIPTION: DB2 R10 altered its use of Media        *
  *                      Manager.  This change exposed a defect  *
  *                      in Media Manager which caused a Media   *
  *                      Manager IO request to indicate          *
  *                      completion before all the requested IO  *
  *                      had been issued. To experience this     *
  *                      failure, the data set must be striped   *
  *                      and the IO request must access a large  *
  *                      number of CIs.                          *
  *                      In this failure case, the number        *
  *                      of CIs accessed on a single stripe      *
  *                      exceeded 100.  These CIs were each      *
  *                      discontiguous on the stripe.  If the    *
  *                      CIs are contiguous on a stripe, a       *
  *                      larger number of CIs can be processed   *
  *                      before encountering the error.  For     *
  *                      zHPF IO IBM believes that the exposure  *
  *                      does not exist.                         *
  *                      DB2 R9 and below are not exposed.       *
  *                      Other users of Media Manager, such as   *
  *                      VSAM, are not exposed.                  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• the defect is corrected.
  

Temporary fix

• *********
  * HIPER * AA39724
  *********
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UA65542 UA65543 UA65544

Modules/Macros

•    ICYPIO64
  

Fix information

• Fixed component name

  DFSMS MEDIA MAN

• Fixed component ID

  5695DF126

Applicable component levels

• RB10 PSY UA65542

     UP12/06/16 P F206

• RC10 PSY UA65543

     UP12/06/16 P F206

• RD10 PSY UA65544

     UP12/06/16 P F206

Fix is available

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