APAR status
Closed as program error.
Error description
After enabling activity tracing when using WebSphere MQ v7.5 FDCs are created similar to the snippet below. No activity trace messages are put to the SYSTEM.ADMIN.TRACE.ACTIVITY.QUEUE FDC snippet: Probe Id :- XC130004 Component :- xehExceptionHandler Program Name :- amqzlaa0 Probe Description :- AMQ6109: An internal WebSphere MQ error has occurred. Arith1 :- 11 (0xb) Comment1 :- SIGSEGV: address not mapped((nil)) with MQM Function Stack zlaMainThread zlaProcessMessage zlaProcessMQIRequest zlaMQCB zsqMQCB kpiMQCB kqiRegisterConsumer xcsFFST
Local fix
Check the mqat.ini file for syntax errors and correct any that are found.
Problem summary
**************************************************************** USERS AFFECTED: Users of MQ activity trace that use a custom mqat.ini file may be affected by this problem. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: If an mqat.ini file is used to control IBM MQ activity trace and that file contains a syntax error then a SIGSEGV is generated due to IBM MQ accessing a bad pointer. This SIGSEGV occurs during the processing of the MQCLOSE activity trace point
Problem conclusion
A syntax error in mqat.ini should cause activity tracing to be suppressed and so the code was corrected to avoid calling the MQCLOSE activity trace point if tracing is suppressed. This change meant that the bad pointer access could no longer occur. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v7.5 7.5.0.8 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
IT17039
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
2016-09-22
Closed date
2016-09-30
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
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