APAR status
Closed as program error.
Error description
Over time one or more agent processes (amqzlaa0 or amqzlaa0.exe on Windows) accumulate gigabytes of memory, forcing the queue manager to be restarted to reclaim the memory.
Local fix
Restart the queue manager to release the excess memory.
Problem summary
**************************************************************** USERS AFFECTED: Users using applications that consume messages which contain properties or MQRHF2 headers. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: This problem occurred because the memory allocated for MQRFH2/properties was not freed when an MQGET API call was internally re-issued by the queue manager logic in order to retrieve the message under a new unit of work. A trace of the agent process would show the apiGetMessage function returning the internal reason code lrcI_TRANSACTIONAL_NEXT. This reason code is correct and expected, however the path to handle this response did not correctly free allocated memory.
Problem conclusion
MQ has been modified to release the memory used to store properties data when the internal reason code lrcI_TRANSACTIONAL_NEXT is received. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v7.5 7.5.0.7 v8.0 8.0.0.6 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
IT14163
Reported component name
WMQ BASE MULTIP
Reported component ID
5724H7241
Reported release
750
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-03-07
Closed date
2016-04-29
Last modified date
2016-04-29
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 BASE MULTIP
Fixed component ID
5724H7241
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