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DB2 - Problem description

Problem IC69193 Status: Closed

HANG in SMP when performing HASH JOIN. Query Can not be forced off.

product:
DB2 FOR LUW / DB2FORLUW / 910 - DB2
Problem description:
Application can not be forced off because there is deadlatch 
between its subagent processes which are performing hash join. 
 
The deadlatch can be like the following: 
 
process id: 7024680 
Waiting on latch type: (SQLO_LT_sqlriSectInit_C__dynamic_latch) 
- Address: (7800011455a0e80)  , Line: 11023, File: 
sqlri_hsjn_util.C 
Holding Latch type:     (SQLO_LT_sqlri_hsjnLatch__ioLatch) 
   - Address: (780000cb6ae1348)   , Line: 9817, File: 
sqlri_hsjn_util.C 
 
process id: 7594048 
Waiting on latch type: (SQLO_LT_sqlri_hsjnLatch__ioLatch) 
  - Address: (780000cb6ae10c8)  , Line: 9817, File: 
sqlri_hsjn_util.C 
Holding Latch type:     (SQLO_LT_sqlriSectInit_C__dynamic_latch) 
- Address: (7800011455a0e00) , Line: 9603, File: 
sqlri_hsjn_util.C 
Holding Latch type:     (SQLO_LT_sqlri_hsjnLatch__partLatch) 
  - Address: (780000cb6ae10c0)  , Line: 9804, File: 
sqlri_hsjn_util.C 
 
process id: 2601118 
Waiting on latch type: (SQLO_LT_sqlriSectInit_C__dynamic_latch) 
- Address: (7800011455a0e80)  , Line: 11023, File: 
sqlri_hsjn_util.C 
Holding Latch type:     (SQLO_LT_sqlri_hsjnLatch__ioLatch) 
   - Address: (780000cb6ae10c8)   , Line: 9817, File: 
sqlri_hsjn_util.C 
 
Process id 7594048 is holding the 
SQLO_LT_sqlriSectInit_C__dynamic_latch, that process 7024680 is 
waiting for, but this info is not properly dumped in trap file. 
The stack of these processes are like: 
 
 
Stack for process id: 7594048: 
 
 
sqloXlatchConflict 
sqloXlatchAIX 
sqloXlatchConflict 
sqloXlatchAIX 
sqlri_hsjnGetTupleBlock 
sqlri_hsjnPartitionFull 
sqlri_hsjnNewTuple 
sqlrihsjn 
sqlriSectInvoke 
 
Stack for process id: 7024680: 
 
 
sqloXlatchConflict 
sqloXlatchAIX 
sqlri_hsjnFreeTupleBlockList 
sqlri_hsjnFlushBlocks 
sqlri_hsjnPartitionFull 
sqlri_hsjnNewTuple 
sqlrihsjn 
sqlriSectInvoke
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* HANG in SMP when performing HASH JOIN. Query Can not be      * 
* forced                                                       * 
* off.                                                         * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 LUW Version 9.1 Fix Pack 10                   * 
****************************************************************
Local Fix:


available fix packs:


DB2 Version 9.1 Fix Pack 10  for Linux, UNIX and Windows
 DB2 Version 9.1 Fix Pack 11  for Linux, UNIX and Windows
 DB2 Version 9.1 Fix Pack 12  for Linux, UNIX and Windows
 


Solution


Problem was first fixed in Version 9.1 Fix Pack 10


Workaround


not known / see Local fix


BUG-Tracking


forerunner  : APAR is sysrouted TO one or more of the following: IC69287 IC69288 IC69289 
follow-up : 


Timestamps


Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

11.06.2010
30.06.2011
30.06.2011


Problem solved at the following versions (IBM BugInfos)


9.1.FP10



Problem solved according to the fixlist(s) of the following version(s)


9.1.0.10

FixList