How do I fix error 502 from Apache with Confluence (mod_proxy)?

[Ayron Jungren]

I have Confluence sitting behind Apache (mod_proxy), and my httpd.conf section looks like this:

<VirtualHost *:80>

  ServerName confluence.example.com

  ProxyRequests off

  ProxyPreserveHost on

  ProxyPass / http://127.0.0.1:8000/</pre<>>
  ProxyPassReverse / http://127.0.0.1:8000/</pre<>>
</VirtualHost>

I get an HTTP Error 502 whenever I try to access confluence.example.com. Nothing shows up in the Confluence log, but the Apache log shows:

[Thu Jul 21 15:59:23 2011] [error] [client 172.16.32.100] proxy: Error reading from remote server returned by /

[Thu Jul 21 15:59:23 2011] [error] [client 172.16.32.100] (20014)Internal error: proxy: error reading status line from remote server 127.0.0.1:8000

Is there any way to fix this? I can't give Confluence a separate public IP address, and I'd prefer it to run through port 80.

The exact same configuration works for Bamboo, Crowd, Crucible, and JIRA. Also, I can access Confluence directly on port 8000, but that isn't open externally, only over the LAN, and Confluence needs to be accessable over the Internet.

[Ayron Jungren · Accepted solution]

Well, by the advice from Atlassian Support, I've fixed the issue (somewhat) by switching to mod_proxy_ajp, and changing the protocol to AJP/1.3 in the server.xml file.

[Thomas Krug]

Did you check the tomcat logs (stdout and stderr)? This sounds like the proxy parameters are missing in the server.xml

[Ayron Jungren]

Yes, there's literally nothing in the logs, sadly. I tried both with the proxy parameters in server.xml and without, and neither works. Although I've read that I don't need them, as I'm using ProxyPreserveHost, it doesn't work either way, sadly.