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Problem IT22567
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Status: Closed |
DB2READLOG API CAN HANG IN PURESCALE.
|
| product: |
DB2 FOR LUW / DB2FORLUW / A50 - DB2 |
| Problem description: |
The db2Read API can hang when it is executed concurrently on
multiple members in pureScale environment.
In this situation, other EDU updating log records also can
hang.
Example of stack traces in this problem - there will be one
stack with UpgradeLock and another with sqloXlatchConflict:
-------Frame------ ------Function + Offset------
0x0900000000112F14 thread_wait + 0x94
0x090000000D8EC6E8 sqloWaitEDUWaitPost + 0x2D8
0x090000000C80F918
sqlplWaitOnWP__FCP9sqeBsuEduCP14SQLP_LOCK_INFOCP8SQLP_LRBCP15SQL
P_LTRN_CHAINCbN25 + 0x273C
0x090000000CCF1F14
sqlplMakeNewRequestSD__FP9sqeBsuEduP14SQLP_LOCK_INFOP11SQLP_TENT
RYRP8SQLP_LRBP8SQLP_LRBP15SQLP_LTRN_CHAINbT7CbN29 + 0x160C
0x090000000C870008
sqlpUpgradeLock__FP9sqeBsuEduP14SQLP_LOCK_INFO + 0xE7C
0x09000000098229FC
sqlpgReadStartUse__FP9SQLP_DBCBP9sqeBsuEduCUiCUsCUlPb + 0x640
0x090000000E40D74C
sqlplfrFMOpenLog__FP12SQLPLFR_DBCBUiP21SQLPLFR_REQ_SCAN_NEXTUlPU
lPP9SQLP_LECB + 0xFE8
0x090000000E41D0A8
sqlplfrFMReadLog__FP12SQLPLFR_DBCBP21SQLPLFR_REQ_SCAN_NEXTP17SQL
PLFR_SCAN_DATA + 0x42AC
0x090000000DEB492C RunEDU__9sqpLfrEduFv + 0x23BC
0x090000000DEB0264 RunEDU__9sqpLfrEduFv + 0x364
0x090000000DEAFFD0 RunEDU__9sqpLfrEduFv + 0xD0
0x090000000D66B1FC EDUDriver__9sqzEDUObjFv + 0x3F0
0x090000000C3C0DCC sqloEDUEntry + 0x390
-------Frame------ ------Function + Offset------
0x090000000C8137E4 sqloXlatchConflict + 0x540
0x09000000098235D4
sqlpgReadUpdateUseReader__FP9SQLP_DBCBP9sqeBsuEduCUiCUs + 0x63C
0x090000000E40DD78
sqlplfrFMOpenLog__FP12SQLPLFR_DBCBUiP21SQLPLFR_REQ_SCAN_NEXTUlPU
lPP9SQLP_LECB + 0x1614
0x090000000E41D0A8
sqlplfrFMReadLog__FP12SQLPLFR_DBCBP21SQLPLFR_REQ_SCAN_NEXTP17SQL
PLFR_SCAN_DATA + 0x42AC
0x090000000DEB492C RunEDU__9sqpLfrEduFv + 0x23BC
0x090000000DEB0264 RunEDU__9sqpLfrEduFv + 0x364
0x090000000DEAFFD0 RunEDU__9sqpLfrEduFv + 0xD0
0x090000000D66B1FC EDUDriver__9sqzEDUObjFv + 0x3F0
0x090000000C3C0DCC sqloEDUEntry + 0x390 |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* pureScale users *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to the latest fix pack. *
**************************************************************** |
| Local Fix: |
Execute db2ReadLog API only on one member. |
| Solution |
|
| Workaround |
Execute db2ReadLog API only on one member. |
| BUG-Tracking |
forerunner :
follow-up : IT23360 |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 28.09.2017
11.07.2018
11.07.2018 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
