A fix is available
APAR status
Closed as program error.
Error description
After a LOAD Utility successfully completed, ABEND 04E RC00C90101 in DSNODAL1 5002 was seen, since a subsequent I/O for a LOB MAP PAGE returned a page with all zeros.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: DB2 users. * **************************************************************** * PROBLEM DESCRIPTION: ABEND04E 00C90101 ERQUAL5002 in * * DSNODAL1 when accessing a LOB space * * after a LOAD utility has been run. * * * * ABEND04E RC00C200A4 in DSNB5COM during * * a LOAD, followed by DB2 subsystem * * termination RC00E50702. * **************************************************************** * RECOMMENDATION: * **************************************************************** When a LOAD utility is updating multiple LOG NO LOB spaces, there is a timing window in which DB2 may schedule a second write engine for a LOB while one is already running. Since the LOB is opened in format-write mode, the concurrent running of multiple write engines can result in previously formatted pages being written over with zeroes, which can cause a subsequent ABEND04E RC00C90101 in DSNODAL1. It may also result in a write I/O failure which causes an ABEND04E RC00C200A4 in DSNB5COM, bringing down DB2.
Problem conclusion
The logic which drives writes for LOG NO LOBs has been modified to ensure that a second write engine will not be scheduled if the LOB is being accessed in format-write mode.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PM82763
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
A10
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt
Submitted date
2013-02-13
Closed date
2013-03-13
Last modified date
2013-04-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK92490
Modules/Macros
DSNB1FLW
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
RA10 PSY UK92490
UP13/03/28 P F303
Fix is available
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Document Information
Modified date:
02 April 2013