Nginx BAD GATEWAY 502

[chenyed]

Version Plesk v11.0.9_build os_CentOS 110120608.16 6
after the update,
when i try to open the Parallels Plesk Panel page eg. like
https://87.10x.14x.xxx:8443
it allways display a error page Baden Gateway 502.
how can i fix it?

the other domains which in the httpdocs are ok.
only the Parallels Plesk Panel admin page get the error.
thanks

 

[abdi]

What errors do you get when opening the panel in it's respective error log?

tail -f /usr/local/psa/admin/logs/panel.log

 

[chenyed]

What errors do you get when opening the panel in it's respective error log?

tail -f /usr/local/psa/admin/logs/panel.log

there is nothing changed in panel.log .when i try to open the panel page.

 

[InderS]

Try to setup the following setting on your server and check it

proxy_buffer_size 128k;
proxy_buffers 4 256k;
proxy_busy_buffers_size 256k;

;

 

[chenyed]

thanks , but I am Novice.
how to change "proxy_buffer_size" ? is there in /usr/local/psa/admin/conf/templates/default/domain/nginxDomainVirtualHost.php*? i can not find it.