APAR status
Closed as program error.
Error description
When starting the sample amqsevt as an IBM MQ Service then commands such as top or ps show the amqsevt process using almost 100% of a CPU core.
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Users who wish to run the amqsevt sample as an IBM MQ Service on a non-Windows Operating System will be affected by this problem. Platforms affected: Solaris x86-64, Solaris SPARC, Linux on zSeries, Linux on x86-64, Linux on x86, Linux on S390, Linux on Power, IBM iSeries, HP-UX OpenVMS, HP-UX PA-RISC, HP-UX Itanium, AIX **************************************************************** PROBLEM DESCRIPTION: When IBM MQ starts a service, it assigns the stdin file descriptor to /dev/null. Some interactive applications such as amqsevt may not function correctly in this environment. In the case of amqsevt, the select() call in the input loop would constantly be woken up by bytes being sent to it from /dev/null and so the sample would enter a tight loop.
Problem conclusion
The amqsevt sample has been modified to detect whether a terminal is being used for stdin. If it is not then the sample sleeps for 5 seconds in a loop rather than waiting for input. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v9.0 LTS 9.0.0.6 v9.1 CD 9.1.2 v9.1 LTS 9.1.0.2 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
IT26707
Reported component name
IBM MQ BASE M/P
Reported component ID
5724H7261
Reported release
900
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-10-23
Closed date
2019-01-10
Last modified date
2019-01-10
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
IBM MQ BASE M/P
Fixed component ID
5724H7261
Applicable component levels
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
10 January 2019