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From "Tal Dayan" <>
Subject RE: Plese, could you comment on this.. Hanging Tomcat (Standlone) - problem and solution
Date Mon, 19 Mar 2001 07:11:02 GMT

I think the Ajp connector is configured by default to use the
PoolTcpConnector connector which uses PoolTcpEndpoint, so the problem may
affect Ajp as well.

Maybe one of the Tomcat experts on the list can elaborate on this.


> -----Original Message-----
> From: Tagunov Anthony []
> Sent: Sunday, March 18, 2001 10:50 AM
> To:
> Subject: Plese, could you comment on this.. Hanging Tomcat
> (Standlone) - problem and solution
> On Sun, 18 Mar 2001 10:08:42 -0800, Tal Dayan wrote:
> >
> >This is a severe problem that opens Tomcat stand-alone mode to
> DOS attaches but
> >more importantly, it makes it incapable of surviving a single
> busy day on a
> >production system of one of our partners.
> Year!!!! Looks like you've caught A BIG FAT RAT!!! One of the BIGGEST!!!
> I'm a person responsible for all java-based-serving on our sites, not very
> loaded yet.. And looks like _this_ is the problem that has nearly given
> me _grey_ hair!!!
> (What i ended up developing is a pinging facility that would find if our
> nice good Tomcat is _DEAD_ and force-restart it!!!)
> >The symptoms are that Tomcat's  built-in Web server (standalone mode)
> >accumulates..
> Can this happen to Ajp12 connections also? Please, anybody! this
> is the main
> question that i'd like to find out: our Tomcat falls tead pretty
> often (guess what
> my bosses tell me when our sites stop responding!!!) and we do
> not know why..
> The thing is that although we have built-in Web server set (http
> connectors) up
> for all Tomcat instances (we still have 3.2b7..), they are not
> practically used
> much (maybe not invoked at all).. They are used via Ajp12. Can
> this same thing
> happen in this configuration (with mod_jserv on Apache, Apache
> running on BSD,
> Tomcat on Linux RH 6.2)
> Most hearty greeting to evryone,
> sincerely yours, Tagunov Anthony

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