|
Problem IC67775
|
Status: Closed |
FEDERATED ONLY: TOO MANY OR PREDICATES MAY LEAD TO STACK EXHAUST ION AND CRASHWHEN COMPILING THE QUERY |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
Too many OR predicates may lead to stack exhaustion and crash
when compiling the query.
db2diag.log may contain the entries like this.
2010-02-02-09.53.08.422165+540 E21124851A621 LEVEL: Severe
PID : 29538 TID : 100 PROC : db2sysc
0
INSTANCE: db2inst1 NODE : 000 DB : PRODDB
APPHDL : 0-16 APPID:
*LOCAL.db2inst1.100202005306
AUTHID : DB2INST1
EDUID : 100 EDUNAME: db2agent (PRODDB) 0
FUNCTION: DB2 UDB, oper system services, sqloEDUCodeTrapHandler,
probe:30
MESSAGE : ADM0502C The DB2 instance has terminated abnormally.
To remedy this
problem, increase the AGENT_STACK_SZ DBM configuration
parameter.
Contact IBM Support for further assistance.
2010-02-02-09.53.08.422799+540 E21125473A462 LEVEL: Severe
PID : 29538 TID : 100 PROC : db2sysc
0
INSTANCE: db2inst1 NODE : 000 DB : PRODDB
APPHDL : 0-16 APPID:
*LOCAL.db2inst1.100202005306
AUTHID : DB2INST1
EDUID : 100 EDUNAME: db2agent (PRODDB) 0
FUNCTION: DB2 UDB, oper system services, sqloEDUCodeTrapHandler,
probe:40
DATA #1 : <preformatted>
Current stack size = 8388608
2010-02-02-09.53.08.958226+540 E21125936A549 LEVEL: Severe
PID : 29537 TID : 2 PROC : db2wdog
0
INSTANCE: db2inst1 NODE : 000
EDUID : 2 EDUNAME: db2wdog 0
FUNCTION: DB2 UDB, base sys utilities, sqleWatchDog, probe:20
MESSAGE : ADM0503C An unexpected internal processing error has
occurred. ALL
DB2 PROCESSES ASSOCIATED WITH THIS INSTANCE HAVE BEEN
SHUTDOWN.
Diagnostic information has been recorded. Contact IBM
Support for
further assistance. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Agent stack is set to a rather small size *
****************************************************************
* PROBLEM DESCRIPTION: *
* Too many OR predicates may lead to stack exhaustion and *
* crash *
* when compiling the query. *
* *
* *
* *
* db2diag.log may contain the entries like this. *
* *
* *
* *
* 2010-02-02-09.53.08.422165+540 E21124851A621 LEVEL: *
* Severe *
* PID : 29538 TID : 100 PROC : *
* db2sysc *
* 0 *
* *
* INSTANCE: db2inst1 NODE : 000 DB : PRODDB *
* APPHDL : 0-16 APPID: *
* *
* *LOCAL.db2inst1.100202005306 *
* *
* AUTHID : DB2INST1 *
* *
* EDUID : 100 EDUNAME: db2agent (PRODDB) 0 *
* *
* FUNCTION: DB2 UDB, oper system services, *
* sqloEDUCodeTrapHandler, *
* probe:30 *
* *
* MESSAGE : ADM0502C The DB2 instance has terminated *
* abnormally. *
* To remedy this *
* *
* problem, increase the AGENT_STACK_SZ DBM *
* configuration *
* parameter. *
* *
* Contact IBM Support for further assistance. *
* *
* *
* *
* 2010-02-02-09.53.08.422799+540 E21125473A462 LEVEL: *
* Severe *
* PID : 29538 TID : 100 PROC : *
* db2sysc *
* 0 *
* *
* INSTANCE: db2inst1 NODE : 000 DB : PRODDB *
* APPHDL : 0-16 APPID: *
* *
* *LOCAL.db2inst1.100202005306 *
* *
* AUTHID : DB2INST1 *
* *
* EDUID : 100 EDUNAME: db2agent (PRODDB) 0 *
* *
* FUNCTION: DB2 UDB, oper system services, *
* sqloEDUCodeTrapHandler, *
* probe:40 *
* *
* DATA #1 : <preformatted> *
* *
* Current stack size = 8388608 *
* *
* *
* *
* 2010-02-02-09.53.08.958226+540 E21125936A549 LEVEL: *
* Severe *
* PID : 29537 TID : 2 PROC : *
* db2wdog *
* 0 *
* *
* INSTANCE: db2inst1 NODE : 000 *
* *
* EDUID : 2 EDUNAME: db2wdog 0 *
* *
* FUNCTION: DB2 UDB, base sys utilities, sqleWatchDog, *
* probe:20 *
* MESSAGE : ADM0503C An unexpected internal processing error *
* has *
* occurred. ALL *
* *
* DB2 PROCESSES ASSOCIATED WITH THIS INSTANCE HAVE *
* BEEN *
* SHUTDOWN. *
* *
* Diagnostic information has been recorded. Contact *
* IBM *
* Support for *
* *
* further assistance. *
****************************************************************
* RECOMMENDATION: *
* upgrade to V97 FP3 *
**************************************************************** |
| Local Fix: |
Rewriting the query. The query can be rewritten by changing the
long OR into a "IN (..,...,...)" predicate. E.g. change:
select * from N where c1 = 1 OR c1 = 2 OR c2 = 3...
to:
select * from N where c1 IN (1,2,3...) |
| available fix packs: |
DB2 Version 9.7 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
V97 FP3 included the fix. No behavior changes. |
| Workaround |
set the agent size to a larger size |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 11.04.2010
16.09.2010
29.01.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP3
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.3
|
 |
| 9.7.0.3
|
|
