Random 502 Bad Gateway Again and Again

[labulle]

Hi,

I'm the guy who is never posting a problem usually but I'm tired with Plesk I'm doing nothing instead using plesk web admin but I ofter get : 502 Bad Gateway

Starting psa...  * Starting Plesk engine pool manager sw-engine-fpm             Segmentation fault
                                                                         [fail]
                                                                     done
Starting xinetd service...                                           done
Starting sw-cp-server service...                                     done
Starting mysql service...                                            done
Starting bind9 service...                                            done
Starting postgresql service...                                       not installed
Starting spamassassin service...                                     not installed
Plesk: Starting Mail Server... already started
Starting psa...  * Starting Plesk engine pool manager sw-engine-fpm             Segmentation fault
                                                                         [fail]
                                                                     done
Starting drwebd service...                                           done

I checked log but I don't get any clue at psa restart :
2015/11/20 11:00:47 [crit] 4271#0: *21 connect() to unix:/var/run/sw-engine.sock failed (2: No such file or directory) while connecting to upstream, client: ::1, server: , request: "POST /check-plesk.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/sw-engine.sock:", host: "localhost:8443"

Can someone help to check were does that seg fault error comes from ??

Regards,

 

[labulle]

Je précise que ce n'est que l'admin de Plesk qui renvoie cette erreur, les sites webs tournent eux..