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DB2 - Problembeschreibung

Problem IC80600 Status: Geschlossen

DB2 HADR STANDBY MARKED BAD DUE TO "LOG PAGE CHECKSUM MISMATCH"

Produkt:
DB2 FOR LUW / DB2FORLUW / 970 - DB2
Problembeschreibung:
A HADR standby using superasync synchronous mode could hit log 
page checksum mismatch issue bringing down the standby database. 
Please look into the DB2 diaglog.log file for the relevant 
messages similar to the below ones. 
 
2011-11-26-04.02.07.346200-300 I398177E457         LEVEL: Error 
PID     : 1593                 TID  : 140118371329792PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : HDRLNX 
APPHDL  : 0-8                  APPID: *LOCAL.DB2.111126055301 
EDUID   : 41                   EDUNAME: db2shred (HDRLNX) 
FUNCTION: DB2 UDB, High Availability Disaster Recovery, 
hdrGetBlock, probe:40100 
MESSAGE : Log page checksum mismatch. pageLsn 0001DBC66FFB 
 
2011-11-26-04.02.07.349893-300 I398635E474         LEVEL: Error 
PID     : 1593                 TID  : 140118379718400PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : HDRLNX 
APPHDL  : 0-8                  APPID: *LOCAL.DB2.111126055301 
EDUID   : 39                   EDUNAME: db2redom (HDRLNX) 
FUNCTION: DB2 UDB, recovery manager, sqlpPRecReadLog, probe:1275 
RETCODE : ZRC=0x87800148=-2021654200=HDR_ZRC_BAD_LOG 
          "HADR standby found bad log"
Problem-Zusammenfassung:
**************************************************************** 
* USERS AFFECTED:                                              * 
* HADR users using SUPERASYNC sync mode on all platforms.      * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* The problem is that in superasyn mode, it is possible for    * 
* lfr to read a little ahead of logw causing a bad page read.  * 
* The fix is to do a checksome verification on Primary before  * 
* the page is shipped to standby. If the checksome fails then  * 
* the page will be reread.                                     * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Recommend customers to upgrade to the product DB2 version    * 
* v97 fixpack 5 or later.                                      * 
****************************************************************
Local-Fix:
Manually copy the log file for which the log page checksum was 
reported from Primary to Standby and restart the standby.
Lösung
The problem is first fixed in DB2 version v97 fixpack 5.
Workaround
keiner bekannt / siehe Local-Fix
Weitere Daten
Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
27.12.2011
12.03.2012
12.03.2012
Problem behoben ab folgender Versionen (IBM BugInfos)
9.7.FP5
Problem behoben lt. FixList in der Version