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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 37246] New: - Election method T weirdness under constant heavy load
Date Wed, 26 Oct 2005 06:14:49 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=37246

           Summary: Election method T weirdness under constant heavy load
           Product: Tomcat 5
           Version: Unknown
          Platform: Other
               URL: http://algesten.blogspot.com/
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Native:JK
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: puckman@taglab.com


Election method T is electing a worker depending on the amount of traffic to the workers.
If we put a 
constant load on the server using ab -c 150 -n 1000000 http://my.site/page.

By refreshing the jkstatus page a lot we're obvserving that this election method choses the
same worker 
for all requests for around a second or so, effectively having 150 long busy queue on one
worker whilst 
the others are at 0. In other words we're blitzing one worker with the whole load at a time.

I can only speculate to why this is, but if for instance the traffic counters on the workers
are only updated 
every second, simply looking at those counters would elect the same worker for a second at
a time.

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