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38
votes
4answers
126k views

connect() failed (111: Connection refused) while connecting to upstream

I'm experiencing 502 gateway errors when accessing a PHP file in a directory (http://domain.com/dev/index.php), the logs simply says this: 2011/09/30 23:47:54 [error] 31160#0: *35 connect() failed ...
5
votes
1answer
6k views

Nginx + PHP-FPM = “Random” 502 Bad Gateway

I am running Nginx and proxying php requests via FastCGI to PHP-FPM for processing. I will randomly receive 502 Bad Gateway error pages - I can reproduce this issue by clicking around my PHP websites ...
2
votes
2answers
4k views

Finding Nginx/PHP-FPM bottleneck that is causing random 502 gateway errors

I work for a rather busy internet site that is often gets very large spikes of traffic. During these spikes hundreds of pages per second are requested and this produces random 502 gateway errors. Now ...