A fix is available
APAR status
Closed as program error.
Error description
ABEND04E RC00E20006 at DSNJB006 DSNSFSTG when freeing storage. The abending service task is SSCEVN00. The storage pool is LOG MGR VAR LNGTH POOL and the block to be freed is RPLAREA. Storage manager discovered this block is already free. The problem is in DB2 11 for z/OS. Keywords: ExtendedRBA DB2EXTRBA/K
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of DB2 for zOS Version 11 that * * have not converted the BSDS data sets * * to the 10-byte RBA format with DSNJCNVT. * **************************************************************** * PROBLEM DESCRIPTION: ABEND04E RC00E20006 in DSNSVBK as * * DSNJB006 was attempting to free * * buffer storage that was already * * free. * **************************************************************** * RECOMMENDATION: * **************************************************************** BSDS updates were being done as the result of an SCA rebuild request. When the BSDS data sets have not been converted to the 10-byte format, some records must be converted to the pre-version 11 format before they are written to the BSDS. The conversion buffer may be freed, and the pointer to the buffer cleared, without holding the correct latch. This can result in the wrong buffer being freed and various other problems in the BSDS update routines when the pointer to the conversion buffer gets cleared and there are multiple BSDS update requests being processed. In the failing case, DSNJB006 attempted to free buffer storage that was already free, which resulted in an ABEND04E RC00E20006. Depending on the timing of the BSDS update requests, and storage requests from the LOG MGR VAR LNGTH POOL, there could be a possible storage overlay in the LOG MGR VAR LNGTH POOL. LMBVPHDR LMBVPHDRjr DB2OVRLAY/K
Problem conclusion
DSNJB002 has been changed so that the pointer to the conversion buffer will only be updated while holding the BSDS latch.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PI14647
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt
Submitted date
2014-03-27
Closed date
2014-04-17
Last modified date
2014-11-12
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI17152
Modules/Macros
DSNJB002
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
RB10 PSY UI17152
UP14/05/02 P F405 ½
Fix is available
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Document Information
Modified date:
12 November 2014