A fix is available
APAR status
Closed as program error.
Error description
The WebSphere MQ process amqfqpub has high CPU usage immediately after starting the queue manager. The fix for the root cause of the issue is in APAR IV26834. This APAR adds further protection to the product code, to avoid the infinite loop in future.
Local fix
Disable Pub/Sub function: alter the queue manager parameter PSMODE to COMPAT or DISABLED.
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 * * Release 0 Modification 1 and Release 1 * * Modification 0 using PSMODE ENABLED. * **************************************************************** * PROBLEM DESCRIPTION: High CPU usage in the channel initiator * * in the Queued Pub/Sub Daemon when an * * error occurs in startup processing. * **************************************************************** * RECOMMENDATION: * **************************************************************** This error potentially affects all users of queue managers which have the queued publish subscribe process running (PSMODE ENABLED) when an error occurs in startup processing. In some circumstances where an error has occurred elsewhere in the publish/subscribe components, invalid parameters passed to the queued publish/subscribe process can trigger a loop condition which causes the Queued Pub/Sub Daemon process in fmiBuildStreamsSupported to consume high CPU.
Problem conclusion
The fix for the only known root cause of this issue is included with APAR PM69557. This APAR adds further protection to the product code, to avoid the infinite loop in future. 010Y 100Y CMQXFMIA
Temporary fix
Comments
APAR Information
APAR number
PM83749
Reported component name
WMQ Z/OS V7
Reported component ID
5655R3600
Reported release
010
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2013-02-27
Closed date
2013-05-14
Last modified date
2013-07-03
APAR is sysrouted FROM one or more of the following:
IV31840
APAR is sysrouted TO one or more of the following:
UK94286 UK94287
Modules/Macros
CMQXFMIA
Fix information
Fixed component name
WMQ Z/OS V7
Fixed component ID
5655R3600
Applicable component levels
Fix is available
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Document Information
Modified date:
03 July 2013