APAR status
Closed as program error.
Error description
After upgrading from MQ 7.0 to MQ 8.0, queue manager cluster channels become stuck in initializing state. The DISPLAY CHSTATUS command takes long time to complete.
Local fix
Resource contention is thought to be a contributing factor to this problem occurring and so moving IBM MQ to a more capable environment may resolve the issue.
Problem summary
**************************************************************** USERS AFFECTED: Users of MQ clustering who have a large number of transient client connections may be affected by this issue. The issue may be more likely to occur on machines which suffer resource contention. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: A request to start a cluster channel could be delayed indefinitely if a large number of channels are constantly ending since IBM MQ would process these "end channel" events in preference to processing start channel requests.
Problem conclusion
The code has been modified to add an upper limit on the amount of time that IBM MQ will spend processing "end channel" events before processing requests to start new channels. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v8.0 8.0.0.9 v9.0 CD 9.0.5 v9.0 LTS 9.0.0.3 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
IT22864
Reported component name
IBM MQ BASE MP
Reported component ID
5724H7251
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-10-20
Closed date
2017-11-29
Last modified date
2017-11-29
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
IT33908
Fix information
Fixed component name
IBM MQ BASE MP
Fixed component ID
5724H7251
Applicable component levels
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0.0.0","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
15 August 2020