upstream sent invalid status "-1 Copy failed" while reading response header from upstream

NaZz nginx-forum at
Wed Oct 29 15:22:49 UTC 2014

I don't understand this "upstream" "upstream" "upstream backend server".
The upstream is served by fastcgi - fpm.sock on my own server. How do I
attend this problem?
Where do I dig exactly?

Posted at Nginx Forum:,254279,254412#msg-254412

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