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I'm running nginx, and fastcgi to run a wordpress blog.

After a while of running, I am getting 502 bad gateway errors. If i reboot the server things work fine.

Other sites that are running on nginx are not effected (they are not php based), so I just figured out it must be the fastcgi process after looking at the log files saying the upstream client is not responding.

How to I restart this? Is there a special log file for this fastcgi process?

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Depends on the install:

  • find init.d script: ls -al /etc/init.d/*php*
  • look /usr/bin/php-fastcgi: ls -al /usr/bin/php-fastcgi
  • look /usr/bin/spawn-fcgi(if exist '/usr/bin/spawn-fcgi -a -p 9000 -u www-data -f /usr/bin/php5-cgi' to start, 'killall spawn-fcgi' to stop)
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It depends of the Distro/Type but it is probably:

service php-fpm restart
service php5-fpm restart

Anyway restarting service is not a solution, you should find the problem why do the upstream is not responding. You may provide some logs to clarify the issue.

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