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Problem IT34026
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Status: Closed |
INSTANCE COULD GO DOWN WHEN DOING A FULL OUTER JOIN ON TWO COLUMNAR ORGANIZED TABLES WITH NULL COLUMNS
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| product: |
DB2 FOR LUW / DB2FORLUW / B50 - DB2 |
| Problem description: |
Instance could go down when doing a FULL OUTER JOIN on two
Columnar organized tables with NULL columns
Stack for this issue will look like this and coul dbe reported
as a memory corruption in db2diag.log
(diagnoseMemoryCorruptionAndCrash/sqloDiagnoseFreeBlockFailure):
7 ibm_cde::services::Heap::freeMem
8
ibm_cde::services::ManagedArray::~ManagedArray
9 void
ibm_cde::query::GetJoinPayloadEvaluator::getJoinPayloads_Partiti
oned_Fast |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Columnar Full Outer Join Queries Only. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to db2_v115m5fp0 or later *
**************************************************************** |
| Local Fix: |
Turn Columnar support for Full Outer Join using this registry
variable:
db2set DB2_EXTENDED_OPTIMIZATION="FOHSJN OFF"
this registry variable will change Access Plan.
Static Sections need to be recompiled. |
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* Columnar Full Outer Join Queries Only. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to db2_v115m5fp0 or later *
**************************************************************** |
| Comment |
Upgrade to db2_v115m5fp0 or later |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 27.08.2020
19.11.2020
19.11.2020 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
