[FIX] Plesk 9.3 -> Plesk 9.5.4 for Internal Server Error 500 on Admin Panel

[Groo]

Hi,

After the upgrade my websites worked fine but not the control panel, in /var/log/sw-cp-server/error_log I kept seeing:

2012-01-14 16:25:43: (log.c.75) server started
2012-01-14 16:25:43: (mod_fastcgi.c.1337) Dynamic spawning with max_procs > 1 is not supported; setting min_procs = max_procs
2012-01-14 16:25:43: (mod_fastcgi.c.1337) Dynamic spawning with max_procs > 1 is not supported; setting min_procs = max_procs
Must be suid root
2012-01-14 16:25:47: (mod_fastcgi.c.1000) the fastcgi-backend /usr/bin/sw-engine-cgi -c /usr/local/psa/admin/conf/php.ini -d auto_prepend_file=auth.php3 -u psaadm failed to start:
2012-01-14 16:25:47: (mod_fastcgi.c.1004) child exited with status 1 /usr/bin/sw-engine-cgi -c /usr/local/psa/admin/conf/php.ini -d auto_prepend_file=auth.php3 -u psaadm
2012-01-14 16:25:47: (mod_fastcgi.c.1007) if you try do run PHP as FastCGI backend make sure you use the FastCGI enabled version.
You can find out if it is the right one by executing 'php -v' and it should display '(cgi-fcgi)' in the output, NOT (cgi) NOR (cli)
For more information check http://www.lighttpd.net/documentation/fastcgi.html#preparing-php-as-a-fastcgi-program
2012-01-14 16:25:47: (mod_fastcgi.c.1012) If this is PHP on Gentoo add fastcgi to the USE flags
2012-01-14 16:25:47: (mod_fastcgi.c.1105) [ERROR]: spawning fcgi failed.
2012-01-14 16:25:47: (mod_fastcgi.c.3505) all handlers for /index.php on .php are down.

I then edited /etc/sw-cp-server/applications.d/plesk.conf and changed it to

"max-procs" => 1,
"min-procs" => 1,

(which was the setting I had in my prior settings (now stored in plesk.conf.rpmsave))

After this everything worked.

 

[KristianR]

Thanks for sharing. We had the same problem and this fixed the issue.