PM72660: DO NOT ACQUIRE TURBO DRAIN LOCK FOR NON-BLOCK PARTITION LEVEL DRAIN.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Abend04E RC=00C90101 at DSNIOST2:50CB due to a turbo drain
  problem.
  
  Additional Symptoms RC00C900BA TYPE 2008
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: DB2 users using partitioned page sets        *
  ****************************************************************
  * PROBLEM DESCRIPTION: Corrupted data, resulting in any of     *
  *                      the following symptoms:                 *
  *                        - Incorrect output, INCORROUT.        *
  *                        - ABEND04E RC00C90101, RC00C90102,    *
  *                          RC00C90105, or RC00C902xx in        *
  *                          various CSECTs.                     *
  *                        - Data/index inconsistencies reported *
  *                          by the CHECK INDEX utility.         *
  *                        - Page regression reported by the     *
  *                          DSN1LOGP utility.                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Turbo drain logic acquires a write drain lock of part 0 in
  share mode for a partition level drain, either blocked
  or non-blocked. The drain lock is released during
  de-drain. Since non-block partition level drain does
  not acquire partition level drain locks and not set the
  drain-in-control bit, no de-drain is needed and
  the drain lock of part 0 is not released. The following
  write drain requests may not acquire the drain lock of
  part 0 in update mode since the drain lock has been held.
  As a result, other jobs can acquire write claims, make
  updates, and cause data corruption.
  

Problem conclusion

• The turbo drain logic has been modified to not acquire drain
  locks for part 0 if this is a non-block drain request.
  

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:

  UK83726

Modules/Macros

•    DSNB1DRA
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RA10 PSY UK83726

     UP12/12/11 P F212

Fix is available

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