A fix is available
APAR status
Closed as program error.
Error description
IFI306 READS in data sharing mode might return some log records with an LRSN value that is higher than the end-of-scope LRSN, due to a very small timing window. . Example of the records returned. 1 READS 'F' call 10 :EOS recs=0478 rc=04 rsn=00E60812 11 From member id 1 13 From member id 1 . 10 READS 'F' call with EOS (10) 20 :EOS recs=0372 rc=04 ren=00E60812 12 From member id 2 14 From member id 2. . IFCID0306 IFCID306 IFI0306 ASN0633W
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All data sharing users of the IFI READS for * * IFCID 306 facility to read log data from * * DB2 for zOS. * **************************************************************** * PROBLEM DESCRIPTION: A small timing window can result in * * log records being returned to the * * IFI READS for IFCID 306 application * * with an LRSN value that is beyond the * * end-of-scope LRSN for the requested * * F-call, N-call sequence. * **************************************************************** * RECOMMENDATION: * **************************************************************** DSNJR001 can incorrectly update the end-LRSN value in the log read cursor for the host member with a value that is higher than the requested LRSN range. This can occur if the log writer is updating the high written LRSN value in the LMB block in a very small window when DSNJR001 is validating the requested LRSN range. This can cause IFI to return some log records with an LRSN value that is higher than the end-of-scope LRSN value (QW0306ES). When running QREP Capture, this can result in MSGASN0633W and possible missing log data. IDAAV4R1/K
Problem conclusion
The incorrect code in DSNJR001 has been corrected to close this timing window.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PM84864
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
2013-03-14
Closed date
2013-03-28
Last modified date
2015-01-20
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK92982 UK92983
Modules/Macros
DSNJR001
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:
20 January 2015