How to fix upstream timed out (110: Connection timed out) error in Nginx

When you come across "Upstream timed out (110: Connection timed out)" error in your Nginx log:

[error] upstream timed out (110: Connection timed out) while reading response header from upstream, 
client:, server:, request: "GET / HTTP/1.1", upstream: "", host: "", referrer: "requested_url"

That means it takes your web server more than 60 seconds to respond. To solve this problem in nginx.conf change the value of proxy_read_timeout directive. This directive determines how long nginx will wait to get the response to a request. By default it's 60 seconds. Change it to 300 seconds:

server {
    listen       80;
    location / {
        proxy_read_timeout 300;

This should fix the problem.

2012-10-09 16:52:08
you crazy? 5minuts time out o_O
2012-10-09 16:53:31
Why not?
2012-10-09 16:54:17
nice advice thanks, now my apaches are allways in "server reached MaxClients"
2012-10-09 16:58:43
Then you probably have a problem on application side and you need to fix this instead of tuning timeouts. You only need to touch timeouts if you know that your application needs it (i.e. uploading huge files or launching heavy processing scripts/parsers, etc)
2012-11-26 01:25:23
Why would you tie up nginx with a client request for 5 min!! You're just asking for an easy way to DDoS your site. Set sane timeouts. If your server doesn't respond in 5 seconds, you have a much bigger issue.
2012-11-26 05:19:43
The previous comment answers to your question
2013-04-27 18:01:18
Or make it location specific timeout if you know that one URL needs longer to process, but don't put that in the root location block. For example - we have a reporting url that takes a long time - so we set this url specifically with a different timeout - that way the DDoS is limited (the attacker would have to know to hit that url).
2013-06-12 22:51:28
Call me crazy, but the ddos talk is unwarranted. I can send 10k connections to your server in 30s just as easily as I can send them in 300s. If you're worried about dns, you should be looking at a thorttling setting that makes sense.
2014-08-04 19:09:53
this "solution" is almost as awesome as the one i saw saying the way to fix php errors is to turn off error logging
2014-09-22 16:32:51
Actually this solution was useful to me as I'm using Nginx only as an http load balancer in front of a bunch of internal corporate J2EE interactive reporting apps that can take quite some time to process their requests.
Yuan Yuan
2014-10-03 10:18:04
Thank you all upstairs, you all spoke out what I want to ask
2014-11-04 22:10:43
Does not work for me.
2014-11-23 13:19:05
Does not work for me either.
2014-12-16 07:54:50
Does not work for me to.
2014-12-22 16:05:29
I frankly can't believe the first search result from Google and default answer on the "howtounix" site is to raise the timeout to 5 minutes. How cocky does a developer have to be to think they can tie up a browser connection for five minutes, let alone tying up the resources on the proxy server itself? If you need any more than five seconds, you need to spend some time learning ajax or websockets. Please take this ridiculous advice down!!!
2014-12-22 17:03:13
And how would ajax help here? It will still need to make same kind of http request and it will still die by timeout if you don't set it up as described in the article. The solution offered here is for specific use cases and it have a right to live.
Christian Rauchenwald
2015-01-02 15:46:43
I can just agree. Setting the timeout to 5 minutest can not be the solution.
2015-01-09 14:59:50
Setting timeout to 5 minutes is not a right solution ! agreed
2015-01-12 02:41:56
Fixed my problem thanks. Got a large config download to a rubymotion ipad app client that was occasionally taking longer than 60 secs. Upped it to 90secs. Sorted (for now of course) Thanks.
2015-02-10 04:33:51
Why not set the timeout to several hours. I'm sure any customers / site visitors will really be happy about that, and very patient to wait in fromt of an empty screen. Really, why bother with finding issues on the application side when increasing timeout is all you need? <sarcasm mode off>
2015-02-10 06:52:55
Because there may be no issue, but some heavy CSV import script in the backend which can take more time to run than usual? Really, you should think wider.
2015-02-24 02:45:53
Ya my thoughts exactly, there are times with massive queries and reports that get pulled once ina blue moon that more than 5 seconds is needed. Not every company has endless money to throw at faster and faster hardware all day long and hire teams of developers to redo old slow systems.

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