A fix is available
APAR status
Closed as program error.
Error description
When End of Task (EOT) processing for an Allied thread is required, its Agent Control Element (ACE) block is added to a chain for deferred EOT processing by a service task. During this process, when building this deferred EOT ACE queue, its possible that an ACE block that already exists on the deferred EOT queue could get incorrectly added again, causing the ACE forward pointer chain to become corrupted. This corruption results in loop condition of the deferred EOT ACE queue which eventually causes Db2 to abnormally terminate with an ABENDS30D. Additional Keywords: S30D S30D S030D 030F 30D AB30D ABS30D LP ZSA45
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * All Db2 for z/OS Version 12 users of * * the Db2 IMS Attachment Facility * **************************************************************** * PROBLEM DESCRIPTION: * * Db2 could terminate with ABENDS30D * * caused by a loop in termination * * processing. * **************************************************************** * RECOMMENDATION: * * Apply corrective PTF when available * **************************************************************** If an ACE is already on the deferred EOT chain, adding the same ACE to the chain could cause a loop in processing of the ACE deferred EOT chain which could lead to Db2 terminating with ABENDS30D.
Problem conclusion
Db2 is updated to avoid the loop in processing of the ACE deferred EOT chain leading to Db2 terminating with ABENDS30D by checking that an ACE is not already on the ACE deferred EOT chain before adding it to the chain.
Temporary fix
Comments
APAR Information
APAR number
PH23856
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
C10
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2020-03-30
Closed date
2020-04-29
Last modified date
2020-06-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI69263
Modules/Macros
DSN3EOT0
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
RC10 PSY UI69263
UP20/05/07 P F005 ¢
Fix is available
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Document Information
Modified date:
02 June 2020