I got 502 and error_log print upstream sent invalid status "0"

neoesque nginx-forum at nginx.us
Fri Mar 30 03:56:58 UTC 2012


You are right, Maxim.

Those errors are retrieving other webpage by using curl. And the
upstreams return status code 0 seldomly.

Thank you.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,224638,224645#msg-224645

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