Plesk shows 502 Bad Gateway error after upgrade to Plesk 12.0.18

[joseletk]

Symptoms

After Plesk upgrade to version Plesk 12x:

1. 502 Bad Gateway error while accessing Plesk.
2. From /var/log/sw-cp-server/error_log log

Code: [Select]

[error] 29224#0: *99 recv() failed (104: Connection reset by peer) while reading response header from upstream, client, server: , request: "GET /admin/home/admin HTTP/1.1", upstream: "fastcgi://unix:/var/run/sw-engine.sock:", host: "plesk.example:8443", referrer: "https://plesk.example:8443/"

Cause

Obsolete sw-mariadb-client package:

Code: [Select]

# dpkg -l |grep maria
    ii  sw-mariadb-client                 1.0.0-13060717                         Mariadb client library

Resolution

1. Make sure that version of sw-mariadb-client corresponds to the latest in Plesk repository http://autoinstall.plesk.com/PSA_12.0.18/dist-*****/contrib/ . Download and install it, if the version is old:

For example, for Ubuntu 12.04 ,x386:

Code: [Select]

# wget http://autoinstall.plesk.com/PSA_12.0.18/dist-deb-Ubuntu-12.04-i386/contrib/sw-mariadb-client_1.0.0-14033112_i386.deb

    # dpkg -i sw-mariadb-client_1.0.0-14033112_i386.deb
    # dpkg -l |grep maria
    ii  sw-mariadb-client                 1.0.0-14033112                         Mariadb client library
1. Restart sw-cp-server service:

Code: [Select]

/etc/init.d/sw-cp-server stop
/etc/init.d/sw-cp-server start