A fix is available
APAR status
Closed as program error.
Error description
A very small timing window during which the index leaf page is deleted, but the page has already been marked dirty by one thread. So the dirty page is written out while another member reuses the page as a non leaf page. It renders that a dirty page is written to GBP twice without update between in, and leads to page regression.
Local fix
N/A
Problem summary
**************************************************************** * USERS AFFECTED: All DB2 for z/OS data sharing users with * * indexes. * **************************************************************** * PROBLEM DESCRIPTION: ABEND04E RC00C90101 DSNKFTCH * * ERQUAL5004 occurred during index * * access. * **************************************************************** * RECOMMENDATION: * **************************************************************** ABEND04E RC00C90101 DSNKFTCH ERQUAL5004 occurred during index access due to an index page regression. The index page regression was introduced by a timing window during a Group Buffer pool page access where an update to an index page went undetected.
Problem conclusion
Code has been modified to do additional page update detection during Group Buffer pool page access.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PM62042
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
910
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt
Submitted date
2012-04-09
Closed date
2013-04-17
Last modified date
2013-06-04
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK93556 UK93557
Modules/Macros
DSNB1SWS DSNKDLE DSNKINSL
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
Fix is available
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Document Information
Modified date:
04 June 2013