|
Problem IC82629
|
Status: Closed |
DATABASE CRASH DUE TO INCORRECT ROW WIDTH WHEN INSERTING INTO A TEMPORARY TABLE WITH XML COLUMNS IN A MERGE JOIN. |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
The symptom of this problem is a database crash. The following
entries will be
logged in the db2diag.log before the crash:
2012-04-10-21.28.30.700425-240 I26566A556 LEVEL: Severe
PID : 4698234 TID : 1544 PROC : db2sysc
INSTANCE: jtnisbet NODE : 000 DB : TESTER
APPHDL : 0-7 APPID:
*LOCAL.jtnisbet.120411010306
AUTHID : JTNISBET
EDUID : 1544 EDUNAME: db2agent (TESTER)
FUNCTION: DB2 UDB, data management, sqldFastFormatFixedVar,
probe:489
MESSAGE : Record length > Maximum record length.
DATA #1 : Hexdump, 8 bytes
0x070000000EBF6BB8 : 0000 0000 0000 2733
......'3
2012-04-10-21.28.30.702859-240 I27123A545 LEVEL: Severe
PID : 4698234 TID : 1544 PROC : db2sysc
INSTANCE: jtnisbet NODE : 000 DB : TESTER
APPHDL : 0-7 APPID:
*LOCAL.jtnisbet.120411010306
AUTHID : JTNISBET
EDUID : 1544 EDUNAME: db2agent (TESTER)
FUNCTION: DB2 UDB, data management, sqldRowInsert, probe:871
RETCODE : ZRC=0x87040055=-2029780907=SQLD_PRGERR "Unknown
PROGRAM ERROR"
DIA8576C A data management services programming error
occurred.
The db2dump directory will contain a stack traceback file with
something
like the following stack:
MarkDBBad + 0x30C
sqldDumpContext + 0x870
sqldRowInsert + 0x1670
sqlri_mgjnAppendToBuffer + 0x142C
sqlri_mj + 0x2414
sqlriExecThread + 0x584
This problem might happen if the following conditions are ALL
true:
- There is a merge join in the access plan, where the inner
columns (right
side of the join) consists of at least one XML column.
- The merge join's inner stream of rows feature duplicate values
of the inner join key
and it matches to the outer join key.
- There is a shortage of sort memory such that the merge join
can no longer
buffer the inner rows in memory and is forced to spill rows to a
temp table. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* DB2 V9.7 FP6 *
****************************************************************
* PROBLEM DESCRIPTION: *
* The symptom of this problem is a database crash. The *
* following *
* entries will be *
* logged in the db2diag.log before the crash: *
* *
* 2012-04-10-21.28.30.700425-240 I26566A556 LEVEL: *
* Severe *
* PID : 4698234 TID : 1544 PROC : *
* db2sysc *
* INSTANCE: jtnisbet NODE : 000 DB : *
* TESTER *
* APPHDL : 0-7 APPID: *
* *LOCAL.jtnisbet.120411010306 *
* AUTHID : JTNISBET *
* EDUID : 1544 EDUNAME: db2agent (TESTER) *
* FUNCTION: DB2 UDB, data management, sqldFastFormatFixedVar, *
* probe:489 *
* MESSAGE : Record length > Maximum record length. *
* DATA #1 : Hexdump, 8 bytes *
* 0x070000000EBF6BB8 : 0000 0000 0000 2733 *
* ......'3 *
* *
* 2012-04-10-21.28.30.702859-240 I27123A545 LEVEL: *
* Severe *
* PID : 4698234 TID : 1544 PROC : *
* db2sysc *
* INSTANCE: jtnisbet NODE : 000 DB : *
* TESTER *
* APPHDL : 0-7 APPID: *
* *LOCAL.jtnisbet.120411010306 *
* AUTHID : JTNISBET *
* EDUID : 1544 EDUNAME: db2agent (TESTER) *
* FUNCTION: DB2 UDB, data management, sqldRowInsert, probe:871 *
* RETCODE : ZRC=0x87040055=-2029780907=SQLD_PRGERR "Unknown *
* PROGRAM ERROR" *
* DIA8576C A data management services programming *
* error *
* occurred. *
* *
* The db2dump directory will contain a stack traceback file *
* with *
* something *
* like the following stack: *
* *
* MarkDBBad + 0x30C *
* sqldDumpContext + 0x870 *
* sqldRowInsert + 0x1670 *
* sqlri_mgjnAppendToBuffer + 0x142C *
* sqlri_mj + 0x2414 *
* sqlriExecThread + 0x584 *
* *
* This problem might happen if the following conditions are *
* ALL *
* true: *
* - There is a merge join in the access plan, where the inner *
* columns (right *
* side of the join) consists of at least one XML column. *
* - The merge join's inner stream of rows feature duplicate *
* values *
* of the inner join key *
* and it matches to the outer join key. *
* - There is a shortage of sort memory such that the merge *
* join *
* can no longer *
* buffer the inner rows in memory and is forced to spill rows *
* to a *
* temp table. *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 V9.7 FP7 *
**************************************************************** |
| Local Fix: |
Since the problem is specific to a merge join, it may be
possible to optimize the
query in a different way that chooses an alternate join method. |
| available fix packs: |
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 |
First Fixed in DB2 V9.7 FP7 |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC84603 IC84616
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 12.04.2012
05.11.2012
05.11.2012 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP7
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.7
|
 |
