Nginx 502 bad gateway errors

Hi

I am getting a lot of 502 bad gateway errors and this error i think is related to phpfpm (i am using multiple pools) and don't know why as on the same specs server i have another site running x4 more traffic with an older version of centminmod and with exact same settings and i am wondering if it is any bug related to latest centminmod beta as on a third server with exact same setup/settings and almost no traffic at all i have the same issue and in the logs of phpfpm there is no info there and limit problems for max children or anything related.

In the last month i was install 3 servers and all have the same issue but on all older servers never had this issue without a reason....

For me it looks like the problem starts when you add the maintenance mode but i am not sure and don't have more accurate info

If it is auto detecting the fpm if it is down or not the problem could be that i use fpm pools?

Or maybe some php code is not compatible with the 5.6.x php..... Can't think anything else...

Thanks

 

No

Yes

Which file can give info for 502 errors?

 

Is that enough to test it? :

Code:

;include=/usr/local/nginx/conf/phpfpmd/*.conf

restart fpm.....

or i must revert everything step by step?