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From Robin Wilson <>
Subject RE: Apache Tomcat 503 errors
Date Fri, 01 May 2009 15:22:12 GMT
FYI, we've been using AJP (Apache 2.2.11, tomcat 6.0.18) for a while now, and we've had issues
with 503s as well. We think we've narrowed them down to timeouts on our firewall between the
Apache and Tomcat hosts. So we added 'keepalive' to the ProxyPass directives - and we're now
monitoring to see if the 503s come back (so far, so good).

Robin D. Wilson
Director of Web Development
KingsIsle Entertainment, Inc.
WORK: 512-623-5913
CELL: 512-426-3929

-----Original Message-----
From: Daryl Stultz [] 
Sent: Friday, May 01, 2009 9:59 AM
To: Tomcat Users List
Subject: Re: Apache Tomcat 503 errors

On Tue, Apr 21, 2009 at 6:49 PM, Christopher Schultz <> wrote:

> >
> > Is there a preferred alternative to connecting Apache and Tomcat? Or is
> > mod_proxy the best?
> mod_proxy_ajp is included in httpd, and there have been /lots/ of
> improvements since 2.2.2. Since you can't upgrade, would you consider
> switching to using mod_jk, which is available independently?<>

I switched to mod_jk-1.2.23 and I am pleased to say the 503 errors have gone
away! Thanks for the suggestion.

Daryl Stultz
6 Degrees Software and Consulting, Inc.

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