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Date: Tue, 6 May 2008 20:14:37 +0100
From: "Andrew Hole" <andremailinglist@gmail.com>
To: "Tomcat Users List" <users@tomcat.apache.org>
Subject: Web server and tomcat - firewall
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Hi all|


Maybe you could help me to solve a problem with your experience.

My company has implemented a solution of 3 layers (Apache web server, Tomcat
Container and Database). There is a firewall between the web server and the
tomcat.

We get the following errors in mod_jk log:


These errors are caused by loss of TCP packages in firewall (???).

[Tue May 06 16:24:03 2008] [2704:3128] [error] jk_ajp_common.c (951): (p11)
can't receive the response message from tomcat, network problems or tomcat (
10.202.131.130:8009) is down (errno=54)

[Tue May 06 16:24:03 2008] [2704:3128] [error] jk_ajp_common.c (1592): (p11)
Tomcat is down or refused connection. No response has been sent to the
client (yet)

(is not true when log says that tomcat is down because some requests get the
correct response)


Setting "JkOptions + DisableReuse" in httpd.conf does not solve the problem.
Any suggestions?


Thank you and I apologise for the inconvenience.


Greetings

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