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...

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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?