Issue plesk-php74 FastCGI Process Manager failed to start

[Thabet]

Hello,
I have a debian 10, I can not access plesk anymore on /ip.adress:8443 (404 Not found) and websites related to the webserver are showing 502 badgateway.
Apache2 doesn't work.
I did not do any suspicious operations that may lead to this state so I need some help to understand what's going on exactly.

journalctl -xe is showing this error

*****************************************
Sep 28 14:51:53 laughing-cerf.54-36-114-144.plesk.page systemd[1]: plesk-php74-fpm.service: Failed to run 'start' task: Operation not permitted
***************************************

******************************************
Sep 28 14:51:53 laughing-cerf.54-36-114-144.plesk.page systemd[1]: plesk-php74-fpm.service: Failed with result 'resources'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: Debian -- Support
--
-- The unit plesk-php74-fpm.service has entered the 'failed' state with result 'resources'.
*****************************************


****************************************
Sep 28 14:51:53 laughing-cerf.54-36-114-144.plesk.page systemd[1]: Failed to start The PHP 7.4.23 FastCGI Process Manager.
-- Subject: A start job for unit plesk-php74-fpm.service has failed
-- Defined-By: systemd
-- Support: Debian -- Support
--
-- A start job for unit plesk-php74-fpm.service has finished with a failure.
--
-- The job identifier is 381586 and the job result is failed.
***************************************

I guess the logs above shows that there is an error related to plesk-php7.4

logs for sudo systemctl status php7.3-fpm.service:

● php7.3-fpm.service - The PHP 7.3 FastCGI Process Manager
Loaded: loaded (/lib/systemd/system/php7.3-fpm.service; enabled; vendor preset: enabled)
Drop-In: /usr/lib/systemd/system/php7.3-fpm.service.d
└─limit_nofile.conf
Active: failed (Result: exit-code) since Tue 2021-09-28 14:28:37 UTC; 34min ago
Docs: manhp-fpm7.3(8)
Process: 8034 ExecStart=/usr/sbin/php-fpm7.3 --nodaemonize --fpm-config /etc/php/7.3/fpm/php-fpm.conf (code=exited, status=254)
Main PID: 8034 (code=exited, status=254)

Sep 28 14:28:37 laughing-cerf.54-36-114-144.plesk.page systemd[1]: Starting The PHP 7.3 FastCGI Process Manager...
Sep 28 14:28:37 laughing-cerf.54-36-114-144.plesk.page php-fpm7.3[8034]: Tue Sep 28 14:28:37 2021 (8034): Fatal Error Unable to create lock file: Bad file descriptor (9)
Sep 28 14:28:37 laughing-cerf.54-36-114-144.plesk.page systemd[1]: php7.3-fpm.service: Main process exited, code=exited, status=254/n/a
Sep 28 14:28:37 laughing-cerf.54-36-114-144.plesk.page systemd[1]: php7.3-fpm.service: Failed with result 'exit-code'.
Sep 28 14:28:37 laughing-cerf.54-36-114-144.plesk.page systemd[1]: Failed to start The PHP 7.3 FastCGI Process Manager.

Any help please ?

 

[Monty]

Just a wild guess: You may have invalid permissions on your /tmp directory.

Try chmod 1777 /tmp and also check that you have enough space on your /tmp partition.

 

[Thabet]

Just a wild guess: You may have invalid permissions on your /tmp directory.

Try chmod 1777 /tmp and also check that you have enough space on your /tmp partition.

it says chmod: changing permissions of '/tmp': Operation not permitted even though i logged as root

 

[Monty]

What's the output of:
lsattr -d /tmp
ls -dal /tmp