Website shows 500 Internal Server Error: process /var/www/cgi-bin/cgi_wrapper/cgi_wrapper(18350) exit(communication error), get unexpected signal 11

Created:

2016-11-16 13:17:48 UTC

Modified:

2017-04-24 11:03:25 UTC

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Website shows 500 Internal Server Error: process /var/www/cgi-bin/cgi_wrapper/cgi_wrapper(18350) exit(communication error), get unexpected signal 11

Applicable to:

  • Plesk 12.5 for Linux
  • Plesk Onyx for Linux
  • Plesk 11.0 for Linux
  • Plesk 11.5 for Linux
  • Plesk 12.0 for Linux

Symptoms

Website shows 500 Internal Server Error . The following messages are in /var/log/httpd/error_log :

[Fri May 15 13:53:28 2015] [warn] [client 203.0.113.2] (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server, referer: https://domain.tld/stringer-tank-top-rot/?c=21
[Fri May 15 13:53:28 2015] [warn] [client 203.0.113.2] (104)Connection reset by peer: mod_fcgid: ap_pass_brigade failed in handle_request_ipc function, referer: https://domain.tld/stringer-tank-top-rot/?c=21

In /var/log/httpd/access_log there are errors like:

[Sun Jan 18 19:51:56 2015] [error] mod_fcgid: process  /var/www/cgi-bin/cgi_wrapper/cgi_wrapper(18350) exit(communication error), get unexpected signal 11
[Sun Jan 18 19:54:18 2015] [error] mod_fcgid: process /var/www/cgi-bin/cgi_wrapper/cgi_wrapper(18655) exit(communication error), get unexpected signal 11
[Sun Jan 18 20:01:05 2015] [error] mod_fcgid: process /var/www/cgi-bin/cgi_wrapper/cgi_wrapper(18763) exit(communication error), get unexpected signal 11

Cause

The issue is caused by incorrect configuration of APC cache module. Or incorrect directories are included in website.

Resolution

  1. Open /etc/php5/conf.d/apc.ini configuration file.

  2. Try to reduce apc.shm_size parameter to 32Mb.

  3. If the issue still persists, disable the module completely by setting apc.enabled=0 .

Otherwise, make sure that all directories that included in website code are accessible by system user.

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