06 Oct

Hou, senseless timeout setting of fcgid

Friday October 06th 2006, 11:06 am
Tags: PmWiki, Server

Don’t want to know how many people were hunting the reason for their FastCGI/FCGI installation throwing “premature end” 500 errors on them sometimes. If a CGI script (e.g. the PHP process) doesn’t answer for 5 seconds (yes, 5 seconds. Do not even think about doing a more complicated calculations inside your PHP scripts!), the user gets this nice HTTP error 500. As soon as you find out that not you are guilty (your script works just fine, only takes a bit longer), it’s even not that hard to find other people reporting the very same problem: Nikolas, Brian, Typo3 list, RubyOnRails wiki, RubyOnRails weblog, …

Once again, taken from RubyOnRails wiki, maybe it will help somebody (the docs can be found here):

 <IfModule mod_fcgid.c>
  ...
   IPCConnectTimeout 8
   IPCCommTimeout 48
  ...
 </IfModule>

Increasing the IPC timeout leaves enough time for your PHP script to finish. This solves the main problem in my Pingback implementation for PmWiki. It seems that the HTTP requests in the XMLRPC classes used there were blocking the PHP process, so it didn’t answer any IPC calls from mod_fcgid anymore.

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7 Comments

7 Comments »

[...] Hou, senseless timeout setting of fcgid [...]

Pingback by Fwolf’s Blog » Blog Archive mod_fcgid出现500错误的解决 - Fwolf's Blog — August 9, 2007 @ 9:01 pm
[...] 500 errors while pulling feeds or loading the dashboard. This afternoon I tracked the problem to mod_fcgid’s ridiculously low default timeout params and fixed it.Sorry for the [...]

Pingback by ZenRadar::Timeout Errors Fixed — May 12, 2008 @ 8:08 pm
[...] Hou, senseless timeout setting of fcgid [...]

Pingback by Fwolf - mod_fcgid — September 19, 2008 @ 3:06 pm
[...] eher nicht der Fall, da es sonst ja immer auftreten w

Pingback by Sporadischer 500 - premature end of script bei fcgid/Apache2 - Server Support Forum — May 24, 2009 @ 12:08 am
Helo,

i have this problem in the logs:

mod_fcgid: read data timeout in 40 seconds
Premature end of script headers: file.xml

Seems like the “IPCConnectTimeout 40″ is to small. So i increased it in /etc/apache2/mods-enabled/fcgid.conf but i get the error again if i run the script. Maybe you can help me?

Comment by Konstantin — June 24, 2009 @ 7:56 am
Do a -full- apache stop and start, sometimes apache and mod_fcgid can be funny . It happened to me today!

Comment by Robert Hilliard — July 24, 2009 @ 5:59 pm
Thank you so much for this! I was having serious errors with 500’s all the time. Now my site runs smoothly!

Comment by Jimmy — December 31, 2009 @ 7:31 pm

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Hou, senseless timeout setting of fcgid

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