APAR status
Closed as program error.
Error description
The queue manager was quiesced. Application activity trace was being used. At that moment, the application called MQOPEN with the MQOO_FAIL_IF_QUIESCING flag. While the queue manager was processing this call, a memory exception was generated in the agent process (amqzlaa0) serving the application. FDC files were written from that process, and the MQOPEN activity failed. ---------------------------------------------------------------- Probe: XC130003 Last function executing: zsqATOpenBefore This FDC might be seen from amqzlaa0 processes, or fastpath applications, or fastpath channel programs.
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Users running MQ 8.0.0.2 or higher, who are using application activity trace, and are ending their queue manager via quiesce option (-w, or -c, or no option). Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: An application called MQOPEN with the option MQOO_FAIL_IF_QUIESCING. While the queue manager was quiescing, this caused a path of execution that incorrectly tried to access memory via a null pointer. This caused a memory exception, and the MQOPEN activity failed. An FDC record was also written to record the memory exception.
Problem conclusion
The MQ product code has been corrected to ensure that a null pointer is not used in this scenario. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v8.0 8.0.0.6 v9.0 CD 9.0.1 v9.0 LTS 9.0.0.1 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
IT16997
Reported component name
WMQ BASE MULTIP
Reported component ID
5724H7251
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-09-12
Closed date
2016-09-29
Last modified date
2017-06-01
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
5724H7251
Applicable component levels
R800 PSY
UP
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Document Information
Modified date:
01 June 2017