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Date: Mon, 6 Apr 2009 14:51:23 -0700
From: John Oliver <joliver@john-oliver.net>
To: Tomcat Users List <users@tomcat.apache.org>
Subject: Re: ajp_read_header: ajp_ilink_receive failed
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References: <20090406211500.GA28624@ns.sdsitehosting.net>
 <49DA773D.30400@christopherschultz.net>
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On Mon, Apr 06, 2009 at 05:42:21PM -0400, Christopher Schultz wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> John,
> 
> On 4/6/2009 5:15 PM, John Oliver wrote:
> > [Sun Mar 29 04:05:33 2009] [error] ajp_read_header: ajp_ilink_receive
> > failed
> > [Sun Mar 29 04:05:33 2009] [error] (120006)APR does not understand this
> > error code: proxy: read response failed from (null) (localhost)
> > 
> > I get these messages a *lot* in my ssl_error_log  Google isn't helping,
> > and I've had no response on the httpd list, so i'm hoping someone here
> > can steer me in the right direction.
> 
> Tomcat version? JVM version? httpd version? mod_proxy_ajp or mod_jk?
> (looks like mod_proxy_ajp) Firewall involved?

RHEL 5.2, httpd-2.2.3-11.el5_1.3, tomcat5-5.5.23-0jpp.7.el5_2.1  There
is no firewall... Tomcat and httpd are on the same box.

I'm not sure how to check the JVM version... this is the first time I've
ever had to worry about Tomcat and Java stuff, so I'm doing a lot of
guessing.

[root@mda-services ~]# rpm -qa | grep java
java-1.4.2-gcj-compat-devel-1.4.2.0-40jpp.115
gcc-java-4.1.2-42.el5
java-1.4.2-gcj-compat-1.4.2.0-40jpp.115

Basically, the Java applications are the only things we're worried
about.  httpd is used as the front end because of SSL and the Tumbleweed
validator.  It basically hands everything off to Tomcat.  It seems to
work, even with all of these error messages, but this setup nwas cobbled
together by developers.  I always figure that error messages are there
for a reason, and I'm better off fixing them.  Also, Tomcat seems to be
pretty unstable and needs to be restarted every week or so, and I
wouldn't be surprised if these berrors have something to do with that.
I just have no idea how to troubleshoot and tweak this stuff to,
hopefully, wind up with a smoothly-running system.

-- 
***********************************************************************
* John Oliver                             http://www.john-oliver.net/ *
*                                                                     *
***********************************************************************

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