Nginx Upstream timed out (110: Connection timed out) – 运维生存时间 http://www.ttlsa.com/nginx/nginx-upstream-timed-out-110-connection-timed-out/
在Nginx错误日志中，有大量的下列信息：
Upstream timed out (110: Connection timed out) while reading response header from upstream
这种情况主要在厦门两种情况下发生:
1. nginx proxy
需要适当的调整proxy_read_timeout值。
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location / {
...
proxy_read_timeout 150;
...
}
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2. Nginx作为php-fpm等等其他的有上游服务
【php-fpm作为nginx的upstream php-fpm作为nginx的上游服务】
在这种情况下，适当的调整fastcgi_read_timeout选项值
Module ngx_http_core_module https://nginx.org/en/docs/http/ngx_http_core_module.html#keepalive_timeout
| Syntax: | keepalive_timeout |
|---|---|
| Default: |
keepalive_timeout 75s; |
| Context: |
http, server, location
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The first parameter sets a timeout during which a keep-alive client connection will stay open on the server side. The zero value disables keep-alive client connections. The optional second parameter sets a value in the “Keep-Alive: timeout=time” response header field. Two parameters may differ.
The “Keep-Alive: timeout=time” header field is recognized by Mozilla and Konqueror. MSIE closes keep-alive connections by itself in about 60 seconds.