|
Problem IT21726
|
Status: Closed |
Deadlatch caused query on a range partitioned table to hang in aparallel environment
|
| product: |
DB2 FOR LUW / DB2FORLUW / B10 - DB2 |
| Problem description: |
During the execution of a query on a range partitioned table, a
deadlatch occurred that caused the query to hang. It was
necessary to recycle DB2 to break the deadlatch.
The factors involved here are:
- parallel environment (SMP enabled)
- select on a range partitioned table with partitioned
indexes
- index needs to be rebuilt
The deadlatch occurred between different subagents processing
the query and rebuilding the invalid index.
The stacks will show similar messages:
Waiting on latch type: (SQLO_LT_SQLD_TCB__loadInProgress) -
Address: (0x7ff506509900), Line: 382, File:
/view/db2_v101fp4_linuxamd64_s140509/vbs/engn/sqd/inc/sqldtcb_in
lines.h
Holding Latch type: (SQLO_LT_SQLP_LTRN_CHAIN__transChainLatch) -
Address: (0x7fcace8d4880), Line: 1696, File:
/view/db2_v101fp4_linuxamd64_s140509/vbs/engn/sqp/inc/sqlpLockIn
ternal.h
Waiting on latch type:
(SQLO_LT_SQLP_LTRN_CHAIN__transChainLatch) - Address:
(0x7fcace8d4880), Line: 1696, File:
/view/db2_v101fp4_linuxamd64_s140509/vbs/engn/sqp/inc/sqlpLockIn
ternal.h
Holding Latch type: (SQLO_LT_SQLD_TCB__loadInProgress) -
Address: (0x7ff506509900), Line: 1025, File:
/view/db2_v101fp4_linuxamd64_s140509/vbs/engn/include/sqldtm_inl
ines.h |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Db2 11.1 Mod 2 Fix Pack 2 or higher *
**************************************************************** |
| Local Fix: |
The problem can be avoided by not scanning a range partitioned
table with invalid indexes; rebuild any invalid indexes before
accessing the table. |
| Solution |
|
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : IT10880
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 03.08.2017
24.10.2017
24.10.2017 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
