Resolved Internal Server Error 500 Plesk not Responding

[abdallahoraby]

I can't access plesk admin area or any websites on server, but server working fine and no loading on it.

 

[abdallahoraby]

i noticed that this happens a lot after users change security options in Wordpress toolkit

 

[weltonw]

Check your error logs. Try /var/log/plesk/panel.log

 

[abdallahoraby]

[2021-03-01 10:22:48.991] ERR [panel] Protocol version '1.6.5.0' is deprecated. Current protocol version is '1.6.9.1'.
[2021-03-01 10:22:49.181] ERR [panel] Protocol version '1.6.5.0' is deprecated. Current protocol version is '1.6.9.1'.
[2021-03-01 10:23:16.805] ERR [panel] Protocol version '1.6.5.0' is deprecated. Current protocol version is '1.6.9.1'.

I got this in error log

 

[abdallahoraby]

[2021-03-01 10:48:28.759] ERR [panel] [Action Log] Failed login attempt with login 'hostarling' from IP 154.238.152.245
[2021-03-01 10:48:30.796] ERR [panel.ui] You have entered incorrect username or password.


log from mod security


--4de99c22-F--
HTTP/1.1 500 Internal Server Error
Strict-Transport-Security: max-age=15768000; includeSubDomains

--4de99c22-H--
Message: Output filter: Response body too large (over limit of 1048576, total not specified).
Apache-Error: [file "apache2_util.c"] [line 271] [level 3] [client 72.52.132.221] ModSecurity: Output filter: Response body too large (over limit of 1048576, total not specified). [hostname "nootahfornotebooks.com"] [uri "/index.php"] [unique_id "YDy0mLFqTvvLgt3XX53oTAAAAAE"]
Apache-Error: [file "mod_proxy_fcgi.c"] [line 688] [level 3] AH01068: Got bogus version 58
Apache-Error: [file "mod_proxy_fcgi.c"] [line 914] [level 3] [status 22] AH01075: Error dispatching request to :
Apache-Handler: proxy:unix:///var/www/vhosts/system/nootahfornotebooks.com/php-fpm.sock|fcgi://127.0.0.1:9000
Stopwatch: 1614591128957088 23571 (- - -)
Stopwatch2: 1614591128957088 23571; combined=2044, p1=488, p2=1420, p3=51, p4=0, p5=84, sr=148, sw=1, l=0, gc=0
Producer: ModSecurity for Apache/2.9.3 (http://www.modsecurity.org/); CWAF_Apache.
Server: Apache
Engine-Mode: "ENABLED"

--4de99c22-Z--

and even if a user tries to login with wrong password plesk hangs a lot

 

[abdallahoraby]

Any support please, because i reboot whole server to get rid of this hanging in plesk, and i did plesk repair many times but issue still happens

 

[Bitpalast]

The issue is within the website. It is creating an infinite loop in a page that makes the page grow bigger and bigger so that it becomes so big that it cannot be delivered by the web server. Such processes clog up the web server, and this eventually leads to the server becoming unresponsive.

Normally it can be caused by a large and partially faulty number of rewrite rules in an .htaccess file. But it is also possible that such loops are created by mismatch between preferred domain settings or forced SSL/non-SSL settings in the web server while the website has opposite settings so that the two play ping pong with data with each other.

Plesk or the server is the wrong place to look for a solution, this is a website problem.