PH37151: IAG2 ABEND04E RC00C90101 DSNIBHRE ERQUAL5007

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• During an IAG2 batch format process, an ABEND 04E 00C90101 was
  seen in DSNIBHRE with ERQUAL 5007 since the allocated first data
  segment was reallocated. Also, after ALTER to IAG2 message
  DSNI087I was seen for each part without the message DSNI055I on
  a table with APPEND YES. The MSGDSNI055I should only be issued
  for APPEND NO tables.
  
  Additional symptoms: DB2IAG2/K MSGDSNI087I
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * DB2 12 for z/OS users of Insert Algorithm                    *
  * 2 (IAG2) on Universal Table Space with                       *
  * Member Cluster defined.                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * 1. ABEND04E AT DSNIBHRE ERQUAL5007                           *
  * during insert workloads using                                *
  * Insert Algorithm 2 (IAG2).                                   *
  * 2. After the insert algorithm                                *
  * was modified to using IAG2, the                              *
  * message DSNI087I was seen for                                *
  * each part without the message                                *
  * DSNI055I on a table defined with                             *
  * APPEND YES. DSNI055I was only                                *
  * issued for APPEND NO tables.                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply corrective PTF when available                          *
  ****************************************************************
  1. During segment allocation for IAG2's batch format process,
  a timing window allowed the first data segment being
  re-allocated due to an incorrect serialization process.  This
  caused recover log-apply process hitting DSNIBHRE:5007 abend.
  2. The IAG2 message code DSNI055I was only issued for tables
  defined with APPEND NO.
  

Problem conclusion

• 1. Db2 code is modified to avoid serialization problems
  during the segment allocation for IAG2's batch format process.
  2. Db2 code is modified to issue the message DSNI055I for
  tables defined with either APPEND YES or APPEND NO. Accept
  cases where the current partition is full and the row has to
  be inserted in another partition, there is no need to re-enable
  IAG2 in the current partition, hence message DSNI055I is not
  issued.
  

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:

  UI76897

Modules/Macros

• DSNISFAS DSNISFPI
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RC10 PSY UI76897

     UP21/09/01 P F108

Fix is available

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