|
Problem IC70337
|
Status: Closed |
INSTANCE ABEND DUE TO STACK OVERFLOW WITH FUNCTION NOTPD_TRAVERSE__9SQLNQ_PIDFP9SQLNQ_OPRI |
| product: |
DB2 FOR LUW / DB2FORLUW / 980 - DB2 |
| Problem description: |
During SQL/XQuery compilation, a query being compiled may cause
the DB2 instance to abend due to a stack overflow exception.
Although new behaviour in DB2 Version 9.5 should ideally cause
the DB2 agent to dump an sqlcode SQL0973N upon detecting such a
scenario, this may not happen when a very large predicate,
e.g., deeply nested series of NOTs, etc., is present in the
query. The stack trace from such an abend will look
like:
-------Frame------ ------Function + Offset------
0x0900000005740BEC
notpd_traverse__9sqlnq_pidFP9sqlnq_opriPbT3CP3loc + 0x14
0x090000000574164C
notpd_traverse__9sqlnq_pidFP9sqlnq_opriPbT3CP3loc + 0xA74
0x090000000574164C
notpd_traverse__9sqlnq_pidFP9sqlnq_opriPbT3CP3loc + 0xA74
0x090000000574164C
notpd_traverse__9sqlnq_pidFP9sqlnq_opriPbT3CP3loc + 0xA74
... |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Users compiling SQL/XQuery. *
****************************************************************
* PROBLEM DESCRIPTION: *
* During SQL/XQuery compilation, a query being compiled may *
* cause the DB2 instance to abend due to a stack overflow *
* exception. *
* Although new behavior in DB2 Version 9.5 should ideally *
* cause the DB2 agent to dump an sqlcode SQL0973N upon *
* detecting *
* such a scenario, this may not happen when a very large *
* predicate, *
* e.g., deeply nested series of NOTs, etc., is present in the *
* query. The stack trace from such an abend will look *
* like: *
* *
* -------Frame------ ------Function + Offset------ *
* 0x0900000005740BEC *
* notpd_traverse__9sqlnq_pidFP9sqlnq_opriPbT3CP3loc + 0x14 *
* 0x090000000574164C *
* notpd_traverse__9sqlnq_pidFP9sqlnq_opriPbT3CP3loc + 0xA74 *
* 0x090000000574164C *
* notpd_traverse__9sqlnq_pidFP9sqlnq_opriPbT3CP3loc + 0xA74 *
* 0x090000000574164C *
* notpd_traverse__9sqlnq_pidFP9sqlnq_opriPbT3CP3loc + 0xA74 *
* ... *
****************************************************************
* RECOMMENDATION: *
* Customer should upgrade to DB2 LUW (PureScale) version 9.8 *
* fispack 4. *
**************************************************************** |
| Local Fix: |
In DB2 Version 9.5, users have the ability to control the size
of the runtime stack used by a DB2 agent.
Consequently,increasing the value for the "agent_stack_sz"
database configuration parameter will help workaround the
issue. |
| available fix packs: |
DB2 Version 9.8 Fix Pack 4 for AIX and Linux
DB2 Version 9.8 Fix Pack 5 for AIX and Linux
|
| Solution |
This APAR is fixed in v9.8 fp4 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 04.08.2010
03.08.2011
03.08.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.8.,
9.8.FP4
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.8.0.4
|
 |
