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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 28727] - CLOSE_WAIT connections draw 100 % cpu
Date Wed, 06 Oct 2004 16:02:05 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=28727

CLOSE_WAIT connections draw 100 % cpu





------- Additional Comments From aquilino@dreamteam.it  2004-10-06 16:02 -------
I can confirm this bug on jakarta-tomcat-5.0.28-embed on Solaris 2.8


Here are my suggestions to reproduce it:

- start Tomcat on server S

- monitor the status of connections on server S
while(1)
netstat -a|grep CLOSE_WAIT|wc -l
sleep 5
end

- establish more than 500 concurrent HTTP connections from client C
(We used JMeter to run a work job with 500 threads, 5 requests each)

- DETACH THE NETWORK CABLE on client C
when you are sure the server is managing at least 500 connections from C

- ATTACH THE NETWORK CABLE on client C

Expected result:
Connections in CLOSE_WAIT status get closed gracefully on server S.

Actual Result:
Connections in CLOSE_WAIT status never get closed on server S.
If you connect to the Tomcat server, response time is very slow.
The number of connections in CLOSE_WAIT status keeps growing.


Thanks for your time and efforts

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