DB2 - Problem description
Problem IC75696 | Status: Closed |
ERROR HANDLING DURING INDEX PAGE PREFETCHING MIGHT CAUSE INSTANCE TO ABEND | |
product: | |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 | |
Problem description: | |
When index page prefetching encounters an error (for example a bad index page error), the error handling might attempt to double free a piece of memory, bringing down the instance. Index page prefetching can occur during index reorg, or a normal select. The trapping process will produce the following callstack <StackTrace> 0x0900000005378BE0 sqloCrashOnCriticalMemoryValidationFailure + 0x20 0x0900000005379590 sqlofmblkEx + 0x490 0x0900000006274E5C sqlbServiceLeafRequest__FP11SQLB_pfMisc + 0x14BC 0x090000000626F3E8 sqlbPFPrefetcherEntryPoint__FP16sqbPrefetcherEdu + 0xAA8 0x090000000627D90C RunEDU__16sqbPrefetcherEduFv + 0x2C 0x09000000054780B8 EDUDriver__9sqzEDUObjFv + 0x278 0x0900000005477DF0 sqlzRunEDU__FPcUi + 0x10 0x09000000053C7F4C sqloEDUEntry + 0x2CC </StackTrace> With error messages that look like the following: 2011-02-01-19.37.13.415181-360 I1863695A2348 LEVEL: Severe PID : 15139044 TID : 34183 PROC : db2sysc 0 INSTANCE: db2inst1 NODE : 000 EDUID : 34183 EDUNAME: db2pfchr (SAMPLE) 0 FUNCTION: DB2 UDB, buffer pool services, sqlbServiceLeafRequest, probe:4479 DATA #1 : String, 9 bytes leafFixCB DATA #2 : Fix control block, PD_TYPE_SQLB_FIX_CB, 168 bytes accessMethod: SQLB_POOL_RELATIVE fixMode: 2 SQLBOLD/SQLBOLDS buffptr: 0x070000028fcac000 bpdPtr: 0x07000000725f3308 dmDebugHdl: 0 objectPageNum: 49407 empDiskPageNum: 4294967295 unfixFlags: 0 dirtyState: SQLBCLEAN fixInfoFlags: regEDUid: 0 | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * ALL * **************************************************************** * PROBLEM DESCRIPTION: * * When index page pre-fetching encounters an error (for * * example a bad index page error), the error handling might * * attempt to double free a piece of memory, bringing down * * the instance. Index page pre-fetching can occur during index * * reorg, or a normal select. * * * * The trapping process will produce the following call stack * * * * <StackTrace> * * 0x0900000005378BE0 * * sqloCrashOnCriticalMemoryValidationFailure +0x20 * * 0x0900000005379590 sqlofmblkEx + 0x490 * * 0x0900000006274E5C sqlbServiceLeafRequest__FP11SQLB_pfMisc * * +0x14BC * * 0x090000000626F3E8 * * sqlbPFPrefetcherEntryPoint__FP16sqbPrefetcherEdu + 0xAA8 * * 0x090000000627D90C RunEDU__16sqbPrefetcherEduFv + 0x2C * * 0x09000000054780B8 EDUDriver__9sqzEDUObjFv + 0x278 * * 0x0900000005477DF0 sqlzRunEDU__FPcUi + 0x10 * * 0x09000000053C7F4C sqloEDUEntry + 0x2CC * * </StackTrace> * * * * With error messages that look like the following: * * * * 2011-02-01-19.37.13.415181-360 I1863695A2348 LEVEL: * * Severe * * PID : 15139044 TID : 34183 PROC : * * db2sysc 0 * * INSTANCE: db2inst1 NODE : 000 * * EDUID : 34183 EDUNAME: db2pfchr (SAMPLE) 0 * * FUNCTION: DB2 UDB, buffer pool services, * * sqlbServiceLeafRequest,probe:4479 * * DATA #1 : String, 9 bytes * * leafFixCB * * DATA #2 : Fix control block, PD_TYPE_SQLB_FIX_CB, 168 bytes * * accessMethod: SQLB_POOL_RELATIVE * * fixMode: 2 SQLBOLD/SQLBOLDS * * buffptr: 0x070000028fcac000 * * bpdPtr: 0x07000000725f3308 * * dmDebugHdl: 0 * * objectPageNum: 49407 * * empDiskPageNum: 4294967295 * * unfixFlags: 0 * * dirtyState: SQLBCLEAN * * fixInfoFlags: * * regEDUid: 0 * **************************************************************** * RECOMMENDATION: * * Upgrade to DB2 Version 9.7 Fixpack 5 * **************************************************************** | |
Local Fix: | |
available fix packs: | |
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows | |
Solution | |
Fixed in DB2 Version 9.7 Fixpack 5 | |
Workaround | |
not known / see Local fix | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 08.04.2011 30.01.2012 30.01.2012 |
Problem solved at the following versions (IBM BugInfos) | |
9.7.FP5 | |
Problem solved according to the fixlist(s) of the following version(s) | |
9.7.0.5 |