10% 500 Errors

[Igor Sysoev]

On Mon, Mar 10, 2008 at 09:12:35AM -0400, James Golick wrote:

> I have nginx running as a proxy to about twelve upstream app servers,
> serving a rails app. Nothing else really in this configuration.
> 
> I am seeing about 10% of requests throwing 500 errors, and this in my error
> log:
> 
> 2008/03/10 08:41:05 [info] 6632#0: *12005 client closed prematurely
> connection while sending response to client, client: xxx, server: xxx,
> request: xxx, host: xxx, referrer: xxx
> 
> I'm also seeing lots of:
> 
> client xxx closed keepalive connection
> 
> but that strikes me as normal, and I'm seeing:
> 
> client closed prematurely connection while reading client request line,
> client: xxx, server: xxx
> 
> I have googled far and wide, and the best answers I came up with were to add
> these lines to my conf:
> 
> proxy_ignore_client_abort  on;
> proxy_next_upstream error;

The default

proxy_next_upstream error timeout invalid_header;

is better.

> but, that doesn't seem to have solved the problem.
> 
> Any ideas?

Do you see 500, 502, or 504 errors ? They are very different things.
Any messages logged at info level is not caused by 50X error.


-- 
Igor Sysoev
http://sysoev.ru/en/