|
Problem IC67001
|
Status: Closed |
FEDERATED ONLY: TOO MANY OR PREDICATES MAY LEAD TO STACK EXHAUST ION AND CRASHWHEN COMPILING THE QUERY |
| product: |
DB2 FOR LUW / DB2FORLUW / 950 - 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: *
* See Error description field for more information. *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Version 9.5 FixPack 6. *
**************************************************************** |
| 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 9.5 Fix Pack 6a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
Problem was first fixed in DB2 UDB Version 9.5 FixPack 6. |
| Workaround |
see LOCAL FIX. |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC67775 IC67776
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 09.03.2010
22.06.2010
03.02.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.5.FP6
|
| Problem solved according to the fixlist(s) of the following version(s) |
