APAR status
Closed as program error.
Error description
If a Websphere MQ application uses a QALIAS pointing at a TOPIC from within a distribution list, then a SIGSEGV occurs in a WebSphere MQ amqzlaa0 agent process. An FDC is produced with following information: Probe Id :- XC130004 Component :- xehExceptionHandler Program Name :- amqzlaa0 Major Errorcode :- STOP Probe Description :- AMQ6109: An internal WebSphere MQ error has occurred. Arith1 :- 11 (0xb) Comment1 :- SIGSEGV: address not mapped(0x200) *--------------------------------------------------------------* MQM Function Stack zlaMainThread zlaProcessMessage zlaProcessMQIRequest zlaMQPUT1 zsqMQPUT1 kpiMQPUT1 kqiPutList kqiFindListDups xcsFFST
Local fix
It is not intended that topics be used with distribution lists so the workaround is to avoid using distribution lists that contain QALIAS queues which point to topics.
Problem summary
**************************************************************** USERS AFFECTED: Users of QALIAS queues that point to topics within a distribution list will be affected by this problem. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: WebSphere MQ is not designed to support the use of distribution lists containing QALIAS queues that point to topics. An omission in the queue manager logic meant that this restriction was not enforced, which led WebSphere MQ to access a pointer to invalid memory.
Problem conclusion
The code was corrected so that WebSphere MQ now returns MQRC_ALIAS_BASE_Q_TYPE_ERROR for a QALIAS pointing to a topic object in a distribution list. The WebSphere MQ documentation will be updated to say that distribution lists should not contain alias queues which resolve to topic objects. It will also be updated to say that any QALIAS pointing to a topic object will return MQRC_ALIAS_BASE_Q_TYPE_ERROR for that queue in the distribution list. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v7.1 7.1.0.8 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
IV82082
Reported component name
WMQ LIN X86-64
Reported component ID
5724H7230
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-03-03
Closed date
2016-08-09
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 LIN X86-64
Fixed component ID
5724H7230
Applicable component levels
R710 PSY
UP
[{"Line of Business":{"code":"LOB45","label":"Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSFKSJ","label":"WebSphere MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.1"}]
Document Information
Modified date:
09 March 2021