APAR status
Closed as program error.
Error description
After applying a Linux kernel update and a restart of the queue manager, the AMQP listener process is unable to acquire the subpool lock. FDCs generated shows: Probe Id :- XY324103 Component :- xstGetSubpoolsLock . Comment1 :- '22 - Invalid argument' from semop and Comment1 :- '43 - Identifier removed' from semop . . Probe Id :- XC130003 Component :- xehExceptionHandler Major Errorcode :- STOP Probe Type :- HALT6109 Arith1 :- 11 (0xb) Comment1 :- SIGSEGV: address not mapped(0xc)
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Users using AMQP Listener Service. Platforms affected: Linux on x86-64 **************************************************************** PROBLEM DESCRIPTION: The AMQP listener service did not correctly handle the case where a operating system shared-memory semaphore was removed outside the control of MQ. The failure to handle this scenario resulted in an illegal memory access, which terminated the listener process.
Problem conclusion
The code is modified such that the error in obtaining the subpool lock is handled and the AMQP Listener thread ends gracefully. It is not expected that MQ's shared memory resources will be removed outside of MQ's control. Users should refrain from attempting to perform such removal. Any unexpected removal of MQ's shared memory resources should be investigated by the operating system administrator. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v8.0 8.0.0.7 v9.0 CD 9.0.2 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
IT18218
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
2016-12-02
Closed date
2017-01-17
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