Apache Proxy TimeOut

apache-2.2PROXY

I am trying to understand what is happening with the following message in our Apache 2.2 error_log:

Wed May 18 21:03:29 2011] [error] [client 172.20.10.10] (70007)The timeout specified has expired: proxy: error reading status line from remote server super-load1-ga.test.com, referer: https://tester2.test.com/boom/ga/inside.asp

We are running Apache 2.2 with mod_proxy. Is this Apache timing out the request related to its 5 min TimeOut value in the httpd.conf? (Meaning it does not recieve a response from the remote server in 5 min.) Or is this simply a response from the remote server saying that it cannot handle the connection?

Apache quickly runs out of its MaxClients around the time I see this error.

Quick example of Proxy entry:

ProxyPass /boom/ga https://super-load1-ga.test.com
ProxyPassReverse /boom/ga https://super-load1-ga.test.com

Best Answer

You increase the timeout in the ProxyPass directive:

ProxyPass /boom/ga https://super-load1-ga.test.com connectiontimeout=300 timeout=300

Timeout values are in seconds.

Related Solutions

Php – How to Proxypass on Apache

Take a look at this:

http://library.linode.com/web-servers/apache/proxy-configuration/multiple-webservers-proxypass-centos-5

It's for CentOS5, but CentOS6 will have similar configuration, as Apache hasn't changed significantly.

Basically, you should not be trying to compile mod_proxy. CentOS's httpd server already has that as a compiled-in module. You just have to activate the proxy directives using the above document. So, you should back out whatever changes you've made when you compiled the module.

Zimbra 7.2 reverse proxy to arbitrary internal website

Follow this link: http://www.maxxer.it/2010/linux/set-apache2-to-proxy-zimbra/

I've successfully proxied Zimbra using Apache2 for long time.

These commands work on Debian/Ubuntu servers.

At first, enable apache2′s modules:

a2enmod proxy
a2enmod proxy_html
a2enmod proxy_http

Make sure the use of mod_proxy is allowed, by changing /etc/apache2/mods_available/proxy.conf

Allow from all

In this case I want to proxy SSL, so before starting you will need to move Zimbra HTTPS away from port 443 (I moved to 444). Copy your Zimbra certificate files to a directory accessible by apache. I choose /etc/apache2/ssl.

To allow automatic redirect from / to /zimbra, as in your normal Zimbra install, add the following line to your main stanza:

RedirectMatch ^/$ /zimbra/
Then, edit you apache2 config file and add:

SSLProxyEngine on
SSLCertificateFile /etc/apache2/ssl/host.crt
SSLCertificateKeyFile /etc/apache2/ssl/host.key
SSLCACertificateFile /etc/apache2/ssl/ca_bundle.crt
ProxyRequests On
ProxyPreserveHost On
ProxyVia full
<Location "/service">
  ProxyPass https://your_zimbra_ip:444/service
  ProxyPassReverse https://your_zimbra_ip:444/service
  ProxyPassReverse /
  ProxyHTMLExtended      On
  ProxyHTMLURLMap /service /service
</Location>

<Location "/zimbra">
  ProxyPass https://your_zimbra_ip:444/zimbra
  ProxyPassReverse https://your_zimbra_ip:444/zimbra
  ProxyPassReverse /
  ProxyHTMLExtended      On
  ProxyHTMLURLMap /zimbra /zimbra
</Location>

<Location "/home">
  ProxyPass https://your_zimbra_ip:444/home
  ProxyPassReverse https://your_zimbra_ip:444/home
  ProxyPassReverse /
  ProxyHTMLExtended      On
  ProxyHTMLURLMap /home /home
</Location>

# CalDAV
<Location "/principals">
  ProxyPass https://your_zimbra_ip:444/principals
  ProxyPassReverse https://your_zimbra_ip:444/principals
  ProxyPassReverse /
  ProxyHTMLExtended      On
  ProxyHTMLURLMap /principals /principals
</Location>
# DAV
<Location "/dav">
  ProxyPass https://your_zimbra_ip:444/dav
  ProxyPassReverse https://your_zimbra_ip:444/dav
  ProxyPassReverse /
  ProxyHTMLExtended      On
  ProxyHTMLURLMap /dav /dav
</Location>
#Printing and HTML interface
<Location "/h">
  ProxyPass https://your_zimbra_ip:444/h
  ProxyPassReverse https://your_zimbra_ip:444/h
  ProxyPassReverse /
  ProxyHTMLExtended      On
  ProxyHTMLURLMap /h /h
</Location>

# img for mobile interface
<Location "/img">
  ProxyPass https://your_zimbra_ip:444/img
  ProxyPassReverse https://your_zimbra_ip:444/img
  ProxyPassReverse /
  ProxyHTMLExtended      On
  ProxyHTMLURLMap /img /img
</Location>

Restart your apache2, and you should be done! P.S. in case you wish to proxy https:

a2enmod ssl

Add the following to your /etc/apache2/sites-available/default-ssl

SSLProxyEngine on
ProxyRequests On
ProxyPreserveHost On
ProxyVia full

Best Answer

Related Solutions

Php – How to Proxypass on Apache

Zimbra 7.2 reverse proxy to arbitrary internal website

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