Fixes are available
APAR status
Closed as program error.
Error description
A multi-threaded C++ client application creates many connections to the same queue manager with the same connection details across many threads. This could result in the symptoms observed in IC64690. If IC64690 is observed, this APAR should also be applied as it addresses conditions which increase the chance that IC64690 occurs.
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Any users of WebSphere MQ using multi-threaded C++ client applications. Platforms affected: Windows **************************************************************** PROBLEM SUMMARY: The problem was caused by an uninitialised MQCD structure being passed from the C++ layer to the C layer. Due to the uninitialised data, this was causing the caching algorithm to fail to find a MQCD match in the list of existing connections, despite the connection details being identical. This was then leading to the unnecessary creation of new cache items, one of the conditions which triggers IC64690 to occur.
Problem conclusion
WebSphere MQ was modified to ensure that the MQCD was initialised correctly within the C++ layer, thus allowing the cache comparison algorithm to correctly ascertain whether a similar connection was already in use. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: v7.0 Platform Fix Pack 7.0.1.2 -------- -------------------- Windows U200316 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
IC64884
Reported component name
WMQ WINDOWS V7
Reported component ID
5724H7220
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2009-11-30
Closed date
2009-12-17
Last modified date
2009-12-17
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
R700 PSY
UP
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Document Information
Modified date:
31 March 2023