|
Problem IC63346
|
Status: Closed |
INSTANCE TRAPS IN SQZDATACHAINITERATOR::PEEKCHAINELEM |
| product: |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 |
| Problem description: |
Problem occurs when concentrator and WLM service superclass
connections concurrency threshold are enabled. If a connection
with a TCP/IP client is switched out and the client dies, the
concentrator dispatcher will try to perform a clean up. The
agent will perform switch in processing before it can proceed
with cleaning up the connection. If the switch failed, the
dispatcher and agent might get into a loop. The connection never
gets cleaned up in this scenario and system CPU usage spikes to
100% because of the loop. The system may also end up with a
signal 11 trap.
<StackTrace>
-------Frame------ ------Function + Offset------
0x09000000116922A8
peekChainElem__20sqzDataChainIteratorXT14sqeApplication_Fv +
0x28
0x0900000011692334
isNull__20sqzDataChainIteratorXT14sqeApplication_Fv + 0x14
0x0900000011693164 sqleServiceClassDeregisterConn__FP8sqeAgentb
+ 0x2E4
0x0900000010B29A2C
AppStopUsing__14sqeApplicationFP8sqeAgentUcP5sqlca + 0x72C
0x0900000010CFFC8C sqlesrspWrp__FP14db2UCinterface + 0x2AC
0x0900000010D04578 sqleUCagentConnectReset + 0x1F8
0x0900000013418718 sqljsCleanup__FP8sqeAgentP14db2UCconHandle +
0x398
0x0900000013427348
sqljsDrdaAsInnerDriver__FP18SQLCC_INITSTRUCT_Tb + 0x5A8
0x0900000013428ABC sqljsDrdaAsDriver__FP18SQLCC_INITSTRUCT_T +
0x23C
0x090000001075178C RunEDU__8sqeAgentFv + 0x3AC
0x090000001074137C EDUDriver__9sqzEDUObjFv + 0x19C |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* all platforms *
****************************************************************
* PROBLEM DESCRIPTION: *
* Problem occurs when concentrator and WLM service superclass *
* *
* connections concurrency threshold are enabled. If a *
* connection *
* with a TCP/IP client is switched out and the client dies, *
* the *
* concentrator dispatcher will try to perform a clean up. The *
* *
* agent will perform switch in processing before it can *
* proceed *
* with cleaning up the connection. If the switch failed, the *
* *
* dispatcher and agent might get into a loop. The connection *
* never *
* gets cleaned up in this scenario and system CPU usage spikes *
* to *
* 100% because of the loop. The system may also end up with a *
* *
* signal 11 trap. *
* *
* *
* *
* <StackTrace> *
* *
* -------Frame------ ------Function + Offset------ *
* *
* 0x09000000116922A8 *
* *
* peekChainElem__20sqzDataChainIteratorXT14sqeApplication_Fv + *
* *
* 0x28 *
* *
* 0x0900000011692334 *
* *
* isNull__20sqzDataChainIteratorXT14sqeApplication_Fv + 0x14 *
* *
* 0x0900000011693164 *
* sqleServiceClassDeregisterConn__FP8sqeAgentb *
* + 0x2E4 *
* *
* 0x0900000010B29A2C *
* *
* AppStopUsing__14sqeApplicationFP8sqeAgentUcP5sqlca + 0x72C *
* *
* 0x0900000010CFFC8C sqlesrspWrp__FP14db2UCinterface + 0x2AC *
* *
* 0x0900000010D04578 sqleUCagentConnectReset + 0x1F8 *
* *
* 0x0900000013418718 *
* sqljsCleanup__FP8sqeAgentP14db2UCconHandle + *
* 0x398 *
* *
* 0x0900000013427348 *
* *
* sqljsDrdaAsInnerDriver__FP18SQLCC_INITSTRUCT_Tb + 0x5A8 *
* *
* 0x0900000013428ABC sqljsDrdaAsDriver__FP18SQLCC_INITSTRUCT_T *
* + *
* 0x23C *
* *
* 0x090000001075178C RunEDU__8sqeAgentFv + 0x3AC *
* *
* 0x090000001074137C EDUDriver__9sqzEDUObjFv + 0x19C *
****************************************************************
* RECOMMENDATION: *
* Upgrade to v95 FP6 *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
V95 FP6 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 22.09.2009
14.05.2010
14.05.2010 |
| Problem solved at the following versions (IBM BugInfos) |
9.5.FP6
|
| Problem solved according to the fixlist(s) of the following version(s) |
