APAR status
Closed as program error.
Error description
The user unmounted the log file system underneath the queue manager. The queue manager therefore failed to write its own log record for a commit operation. But the queue manager continued to call xa_commit to an external XA Resource Manager (a database product). This led to the update being made in the external database product, but not within the queue manger's own resources (a queue).
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Applications using the two-phase commit functionality of a queue manager. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: The log file system had been removed from underneath MQ. It therefore lost ability to write any information about transactions or persistent messages to its transaction logs. When the queue manager failed to write its own log record, it should have ended immediately, and allowed the next run of the queue manager (when the log file system was made available again) to restore the integrity of the two-phase-commit transaction.
Problem conclusion
The MQ code has been corrected so that, if the queue manager fails to write its own log record, it ends immediately, and allows the next run of the queue manager to restore the integrity of the two-phase-commit transaction. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v7.5 7.5.0.8 v8.0 8.0.0.7 v9.0 CD 9.0.2 v9.0 LTS 9.0.0.2 The latest available maintenance can be obtained from 'WebSphere MQ Recommended Fixes' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037 If the maintenance level is not yet available information on its planned availability can be found in 'WebSphere MQ Planned Maintenance Release Dates' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
IT18813
Reported component name
WEBSPHERE MQ 7.
Reported component ID
5724H7240
Reported release
750
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-01-13
Closed date
2017-01-31
Last modified date
2017-03-10
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
WEBSPHERE MQ 7.
Fixed component ID
5724H7240
Applicable component levels
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSDEZSF","label":"IBM WebSphere MQ Managed File Transfer for z\/OS"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.5","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
31 March 2023