> From: Martin Gainty [mailto:mgai...@hotmail.com]
> Subject: RE: Running out of tomcat threads - why many threads in
> RUNNABLEstage even with no activity

> http://publib.boulder.ibm.com/infocenter/wasinfo/v4r0/index.jsp?topic=/
> com.ibm.support.was40.doc/html/Plug_in/swg21163659.html

Vaguely interesting, but not really applicable.  The protocol in question here 
is AJP, not HTTP, and the connections are expected to be persistent, with no 
keep-alives needed.  Unlike in the article cited, neither end will close the 
connection (unless an error occurs, of course).  However, when there's an 
ill-behaved firewall in between Tomcat and the http server (as we appear to 
have here), keep-alives may be required.

This FAQ entry looks promising:
http://tomcat.apache.org/connectors-doc/miscellaneous/faq.html

Look at the entry entitled "I've got a firewall between my web server and 
Tomcat which drops ajp13 connections after some time".

Configuring keep-alives is a fairly low-overhead workaround, but it would be 
better to fix the firewall so it doesn't silently drop connections.

 - Chuck


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