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DB2 - Problem description

Problem IC79860 Status: Closed

DOUBLE FREE ERROR CAN OCCUR IN SQLPRECM WHEN SQLPALR_LOADUSERBUFFER REPORTS
"BUFFER IS TOO SMALL." MESSAGE.

product:
DB2 FOR LUW / DB2FORLUW / 970 - DB2
Problem description:
This problem is known to occur during dropped table rollforward 
recovery. 
A typical call stack may show : 
 
pdLog 
sqloDiagnoseFreeBlockFailure(SMemFBlk*) 
sqloDiagnoseFreeBlockFailure(SMemFBlk*) 
sqlofmblkEx 
sqlprecm(sqeAgent*,SQLP_LSN8*,SQLP_LSN8*,unsigned int,unsigned 
long) 
sqlprUndoPhaseTblSpace(sqeAgent*,SQLP_DBCB*,unsigned 
int*,SQLB_POOL_ID_LIST*,bool*,bool*) 
sqlpForwardRecoveryTblSpace(sqeAgent*,unsigned short,unsigned 
int,char*,int*,int*,int*,unsigned int*,SQLB_POOL_ID_LIST*,int) 
sqlpprfr(SQLP_PDB_RFW_SQP_RQST*,SQLP_RFW_RPLY*,sqeAgent*,SQLB_PO 
OL_ID_LIST*,int*,sqlca*) 
sqlpPdbRfwRouter(sqeAgent*) 
sqleSubRequestRouter(sqeAgent*,unsigned int*,unsigned int*) 
 
the db2diag.log would report the following 2 typical messages : 
 
FUNCTION: DB2 UDB, data protection services, 
sqlpALR_LoadUserBuffer, 
probe:350 
 
DATA #1 : <preformatted> 
 
Buffer is too small.  Update readStartLsn from 1D259B1C5D3F to 
1D259B1C5D3F 
 
and 
 
FUNCTION: DB2 UDB, SQO Memory Management, 
sqloDiagnoseFreeBlockFailure, 
probe:30 
 
DATA #1 : String, 12 bytes 
 
Double free.
Problem Summary:
DB2 can abend when using asynchronous log replay
Local Fix:
no known workarounds
available fix packs:
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
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
This problem has first been fixed in V9.7 Fix Pack 6
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
17.11.2011
22.02.2012
22.02.2012
Problem solved at the following versions (IBM BugInfos)
9.7.FP6
Problem solved according to the fixlist(s) of the following version(s)
9.7.0.6 FixList