IT30189: UPGRADE DB MAY CORRUPT SQLSPCS FILES AND RESULT IN CHECKSUM ERROR WHEN DB IS ACTIVATED

Db2 Version 11.1 Mod 4 Fix Pack 5 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• db2 upgrade db completed successfully but activation of the
  database afterward failed with the following message:
  SQL0980C  A disk error occurred.  Subsequent SQL statements
  cannot be processed.  SQLSTATE=58005
  
  During the upgrade, a container name in SPCS files is compressed
  from an
  absolute path to a relative path but the 'Container memory used'
  is not updated accordingly, the wrong size is then written to
  disk into SQLSPCS.1 and SQLSPCS.2 files, it results in bad
  container checksum calculated when the db is activated
  afterward.
  Note that the absolute path has to be in /db
  path/your_instance/NODExxxx/SQLxxxxx to trigger this problem.
  
  Errors will be similar to this in db2diag.log:
  
  FUNCTION: DB2 UDB, buffer pool services, sqlbReadPoolOneFile,
  probe:1681
  MESSAGE : ZRC=0x86020019=-2046689255=SQLB_CSUM "Bad Page,
  Checksum Error"
           DIA8426C A invalid page checksum was found for page "".
  DATA #1 : Pool control block, PD_TYPE_SQLB_POOL_CB, 54160 bytes
  name:                  USERSPACE1
  poolID:                                 2
  flags:                                101
  flags2:                                20
  local flags:                            0
  

Local fix

• Asking Db2 support to format SPCS files, verify it is the APAR
  and patch the container name using the absolute path.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Db2 11.1 Mod 4 Fixpack 5 or higher                *
  ****************************************************************
  

Problem conclusion

• First fixed in Db2 11.1 Mod 4 Fixpack 5
  

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:

Fix information

• Fixed component name

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels

• RB10 PSN

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