APAR status
Closed as program error.
Error description
The DBCB control block used to hold the status of the logger process is being over written by another thread mid process when the system is under heavy load. This causes the log to become corrupt leading to BAD_LOG FDCs.
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Users of MQ v 7.1 running on modern non deterministic optimising processors. Platforms affected: Windows **************************************************************** PROBLEM DESCRIPTION: The DBCB control block used to hold the status of the logger process could be overwritten by another thread mid process when the system is under heavy load. This caused the log to become corrupt leading to BAD_LOG FDCs.
Problem conclusion
Memory fences have been added to the code to ensure that the communication between the different processes are performed in a deterministic manner. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v7.1 7.1.0.9 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
IT14635
Reported component name
WMQ WINDOWS V7
Reported component ID
5724H7220
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-04-05
Closed date
2017-02-28
Last modified date
2017-02-28
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
WMQ WINDOWS V7
Fixed component ID
5724H7220
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"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
31 March 2023