IT22386: DB2 : IF ANY COMMAND WITH RECLAIM EXTENTS OPTION IS RUN ON AN MDC TABLE DURING A BACKUP, A ROLLFORWARD ON IT COULD FAIL

Db2 Version 11.1 Mod2 Fix Pack2 iFix002 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 3 Fix Pack 3 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix002 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• - When one or more commands like "TRUCATE TABLE with REUSE
  STORAGE option" or "AUTO or MANUAL REORG TABLE with RECLAIM
  EXTENTS option" i.e. commands which perform a "reclaim extents"
  operation are executed on an MDC table while an online backup is
  in progress,
  DB2 frees those extents for the table, but the operation is not
  logged correctly.
  The backup completes successfully.
  
  - Restore of this backup is also successful.
  
  - When the Rollforward is executed, DB2 tries to replay a
  "create new block" operation in logs for the table in question
  and fails with following error as these extents are no more
  available, they were already freed .
  
  db2diag.log will have LEVEL: Error message:
  
  FUNCTION: DB2 UDB, buffer pool services, sqlbExtendObject,
  probe:650
  MESSAGE : ZRC=0x8402001A=-2080243686=SQLB_EMP_MAP_INFO_END "EMP
  MAP INFO END"
  
  The fix will ensure that the "reclaim extent" operations run
  during backup are logged correctly so replay during rollforward
  will not fail.
  

Local fix

• As a workaround, please avoid running the following when there
  is an online backup in progress:
  
  1) TRUCATE TABLE with the REUSE STORAGE option on an MDC table
  2) REORG TABLE with the RECLAIM EXTENTS option (AUTO or MANUAL)
  on an MDC table
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Db2 11.1 Mod 2 Fix Pack 2 iFix002 or higher       *
  ****************************************************************
  

Problem conclusion

• First fixed in Db2 11.1 Mod 2 Fix Pack 2 iFix002
  

Temporary fix

Comments

APAR Information

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

  IT22352

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

Fix information

• Fixed component name

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels