Possible reason for NGINX 499 error codes

nginx http-headers uwsgi
Tampa picture Tampa · Oct 19, 2012 · Viewed 267.2k times · Source

I'm getting a lot of 499 NGINX error codes. I see that this is a client side issue. It is not a problem with NGINX or my uWSGI stack. I note the correlation in uWSGI logs when a get a 499.

address space usage: 383692800 bytes/365MB} {rss usage: 167038976
bytes/159MB} [pid: 16614|app: 0|req: 74184/222373] 74.125.191.16 ()
{36 vars in 481 bytes} [Fri Oct 19 10:07:07 2012] POST /bidder/ =>
generated 0 bytes in 8 msecs (HTTP/1.1 200) 1 headers in 59 bytes (1
switches on core 1760)
SIGPIPE: writing to a closed pipe/socket/fd (probably the client
disconnected) on request /bidder/ (ip 74.125.xxx.xxx) !!!
Fri Oct 19 10:07:07 2012 - write(): Broken pipe [proto/uwsgi.c line
143] during POST /bidder/ (74.125.xxx.xxx)
IOError: write error

I'm looking for a more in depth explanation and hoping it is nothing wrong with my NGINX config for uwsgi. I'm taking it on face value. It seems like a client issue.

Answer

mrbo picture mrbo · Aug 23, 2013

HTTP 499 in Nginx means that the client closed the connection before the server answered the request. In my experience is usually caused by client side timeout. As I know it's an Nginx specific error code.

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