IT31308: IN DB2 PURESCALE EXTENT MOVEMENT MIGHT TIMEOUT AND THEN BRING DBDOWN WHEN LOCKTIMEOUT IS NOT -1

APAR status

• Closed as program error.

Error description

• In pureScale when database configuration parameter LOCKTIMEOUT
  is not the
  default value -1, an extent movement started by an ALTER
  TABLESPACE LOWER HIGH WATER MARK or an ALTER TABLESPACE REDUCE
  MAX could return a lock time out error which in return will
  bring the system down.
  
  Key entries in db2diag.log :
  
  2019-11-28-06.33.02.188901-300 I1072258134A1106     LEVEL:
  Severe
  PID     : 7209176              TID : 66395          PROC :
  db2sysc 0
  INSTANCE: db2inst1              NODE : 000           DB   :
  SAMPLE
  EDUID   : 66395                EDUNAME: db2ExtMovHelper (SAMPLE)
  0
  FUNCTION: DB2 UDB, buffer pool services,
  sqlbEMHelperEDU::sqlbExtentMovementHelperEntryPoint, probe:12217
  MESSAGE : ZRC=0x80100044=-2146435004=SQLP_LTIMEOUT
            "LockTimeOut - tran rollback Reason code 68"
  DATA #1 : String, 14 bytes
  Error Occurred
  
  
  2019-11-28-06.33.02.189754-300 I1072259241A966      LEVEL: Info
  PID     : 7209176              TID : 66395          PROC :
  db2sysc 0
  INSTANCE: db2inst1             NODE : 000           DB   :
  SAMPLE
  HOSTNAME: host1
  EDUID   : 66395                EDUNAME: db2ExtMovHelper (SAMPLE)
  0
  FUNCTION: DB2 UDB, base sys utilities,
  sqeLocalDatabase::ForceDBShutdown, probe:16937
  DATA #1 : Pointer, 8 bytes
  0x0000000000000000
  DATA #2 : Boolean, 1 bytes
  false
  CALLSTCK: (Static functions may not be resolved correctly, as
  they are resolved to the nearest symbol)
    [0] 0x090000001ECF8044 ForceDBShutdown__16sqeLocalDatabaseFi +
  0x364
    [1] 0x09000000212B315C
  sqlbExtentMovementHelperEntryPoint__15sqlbEMHelperEDUFv + 0x49C
    [2] 0x09000000212B2AB8 RunEDU__15sqlbEMHelperEDUFv + 0x38
    [3] 0x090000001E1A4C40 EDUDriver__9sqzEDUObjFv + 0x300
    [4] 0x090000001E086280 sqloEDUEntry + 0x360
    [5] 0x0900000000570E10 _pthread_body + 0xF0
    [6] 0xFFFFFFFFFFFFFFFC ?unknown + 0xFFFFFFFF
  

Local fix

• Set database configuration parameter LOCKTIMEOUT to -1 after db2
  restart db.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to V11.1.4.6                                         *
  ****************************************************************
  

Problem conclusion

• Upgrade to V11.1.4.6
  

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