If your not scared of the performance penalty (which these days isn't
scary unless you really have high load) - try adding this to your apache
config - it will end the connection between apache and tomcat after each
request. This virtually eliminates the chance of a firewall dropping
connections for you.
JkOptions +DisableReuse
YOu prob dont want this permanantly but its a good test
http://tomcat.apache.org/connectors-doc/reference/apache.html
-Tim
Jones, Keven wrote:
Thank you Tim
I am going to attempt to set the maxThreads on 8011 to 600 and hope it helps.
The config is 1 linux apache2 server with 4 linux tomcat servers and each
tomcat server has 4 sepearte tomcat instances. So we have a total of 16 tomcat
instances across 4 servers.
Yes, there is a firewall between the web sever and the app(tomcat)/db(mysql)
server.
KJ
-----Original Message-----
From: Tim Funk [mailto:funk...@apache.org]
Sent: Wednesday, June 10, 2009 1:02 PM
To: Tomcat Users List
Subject: Re: Tomcat maxThreads Issue
Looking at the history of the thread - here are some guesses ....
You have a connector on port 81 (http) and a connector on 8011 (ajp) and
commented out connector for 443.
The port 81 connector and commented out connector are set to 600 - which means
absolutely nothing if apache is talking to tomcat via jk.
Set |maxThreads on the connector for using port 8011 and life should be better.
If there are mulitple apache servers in front of tomcat - you need to ensure
you have (#apaches * max number connections per apache) threads available on
each tomcat. The thread history seems to indicate you only have one apache with
100 workers max. So raising the maxThreads in tomcat from 200 to something
higher is not needed.
Is there a firewall between apache and tomcat? If so - it could mean that your
firewall is timing out the connection and then bad things happen.
|
http://tomcat.apache.org/tomcat-6.0-doc/config/ajp.html
-Tim
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