NGINX : Proxy pass intercepting 5xx errors - Possible to differentiate between ones fired by backed vs ones fired by nginx itself?

Posted by anonymous-one on Server Fault See other posts from Server Fault or by anonymous-one
Published on 2012-09-16T17:42:46Z Indexed on 2012/09/17 3:40 UTC
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Filed under:

nginx

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logging

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reverse-proxy

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http-status-code

We use proxy_intercept_errors ( http://wiki.nginx.org/HttpProxyModule#proxy_intercept_errors ) with our backends.

We intercept a number of status codes, including a few 5xx ones.

Our 5xx (each 500 has its own) handler has an access_log so we can see all the 5xx errors returned to the user in a nice clean logged format.

The issue with this is that as it stands now, we cannot tell weather a 5xx was returned to the user by nginx or intercepted from our backend.

Is there any way to differentiate between the two?

Thanks.

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