Fixes are available
APAR status
Closed as program error.
Error description
On ClearQuest web, attempting concurrent login and other operations cause significant slowdown, lock timed out error and/or eventual hang. The refcount mutexes appear to be causing significant slowdown on Windows. In the cqrpc dumps, many threads are in CreateMutex which suggests there may be some kind of synchronization occurring in mutex creation (and destruction). This is the cause since Win32 will check to see if the mutex already exists before trying to create it. So it has to lock on the entire set of mutexes. Since on Windows, mutexes are system wide (and exist across processes), this may also add some synchronization across processes. Note, On UNIX, the mutexes appear not to be causing any performance issues. ClearQuest 8.0.1.10 TestFix4 and later is affected by this defect. Steps to reproduce; 1) Start independent browser sessions about 40 depending on the load performance 2) Click login on each browser session moving one by one manually 3) Extract Query folder one by one 4) Run query on each browser Repeat 3) - 4), if possible. The login prompt and loading process slow down, hang or respond error. SystemOut.log starts recording lock timed out error and then thread hang message.
Local fix
None Easing login or workspace load by removing query folders and shortcut, limiting the number of concurrent user login in a certain amount of time might help if not completely.
Problem summary
**************************************************************** * USERS AFFECTED: * * ClearQuest Web * **************************************************************** * PROBLEM DESCRIPTION: * * ClearQuest Web might get sluggish on Windows after many * * users logged in. * **************************************************************** * RECOMMENDATION: * ****************************************************************
Problem conclusion
A fix is available in ClearQuest 9.0.0.1 A change was made to eliminate the slow down on ClearQuest Web.
Temporary fix
Comments
APAR Information
APAR number
PI62169
Reported component name
CLEARQUEST WIN
Reported component ID
5724G3600
Reported release
801
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-05-10
Closed date
2016-06-13
Last modified date
2016-06-13
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
CLEARQUEST WIN
Fixed component ID
5724G3600
Applicable component levels
R801 PSY
UP
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSSH5A","label":"Rational ClearQuest"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"801","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
16 October 2021