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DB2 - Problem description

Problem IC77730 Status: Closed

TIMING ISSUE COULD LEAD TO A TRAP WHEN CANCELLING A LOAD OPERATION

product:
DB2 FOR LUW / DB2FORLUW / 970 - DB2
Problem description:
During the process of canceling a load operation, a rare timing 
issue can lead to a de-reference of a NULL pointer resulting in 
a trap. The stack would look similar to below: 
 
 
<StackTrace> 
ossDumpStackTrace 
OSSTrapFile4dumpEmi 
sqlo_trce 
sqloEDUCodeTrapHandler 
sqlrr_qp_process_cancel_list 
sqljsSqlam 
sqljsDrdaAsInnerDriver 
sqljsDrdaAsDriver 
sqeAgent 
sqlzRunEDU 
sqloEDUEntry 
__pthread_bound_body 
</StackTrace> 
 
Another stack for this defect could be: 
 
sqlra_open_pkg__FP8sqlrr_cbPUcsT2T3T2 + 0x98 
sqlra_load_pkg__FP8sqlrr_cbPUcsT2T3T2b + 0xA48 
sqlra_get_section__FP8sqlrr_cbPUcsT2T3T2UsUlP16db2UCprepareInfoP 
15db2UCCursorInfo + 0x1C 
sqlrr_qp_process_cancel_list__FP8sqlrr_cbP5sqlca + 0xD0 
@64@sqljsSqlam__FP14db2UCinterfaceP8sqeAgentb + 0x484 
@64@sqljsDriveRequests__FP8sqeAgentP14db2UCconHandle + 0xA0 
@64@sqljsDrdaAsInnerDriver__FP18SQLCC_INITSTRUCT_Tb + 0x310 
sqljsDrdaAsDriver__FP18SQLCC_INITSTRUCT_T + 0xEC 
RunEDU__8sqeAgentFv + 0xB4 
EDUDriver__9sqzEDUObjFv + 0xDC 
sqlzRunEDU__FPcUi + 0x24 
sqloEDUEntry + 0x264
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* All                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 V97FP5                                        * 
****************************************************************
Local Fix:
available fix packs:
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
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
The fix is first available in DB2 V97FP5 and subsequent fixpacks
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
26.07.2011
08.12.2011
07.08.2013
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 FixList
9.7.0.6 FixList