Friday, 7 June 2013

nginx - (13: Permission denied) while reading upstream

2013/06/07 21:13:38 [crit] 17799#0: *717313 open() "/var/lib/nginx/proxy/2/19/0000000192" failed (13: Permission denied) while reading upstream, client:, server:, request: "GET /web/jsp/example.jsp HTTP/1.1", upstream: "", host: ""

Typically this is a problem of saving the buffered data from the proxy server and sending it back. When the upstream server response returns large number of bytes then nginx keeps the part of data at the disk and start sending the first received bytes to browser. So for that it uses a certain directory to maintain the data at the configured directory, which is "/var/lib/nginx/proxy" in my case. So you just need to give access to that directory to worker user of nginx.

1. open the /etc/nginx/nginx.conf to find worker user of nginx
2. Or ps -ef | grep nginx  and check which user is running worker process
$ ps aux | grep “nginx: worker process” | awk ‘{print $1}’
3. In my case it is www-data
4. Give access to that directory
$ chown -R www-data.www-data /var/lib/nginx
5. Done

Nginx access related articles Why nginx usually throws 403, Forbidden?

# Nginx is returning on part data in response
# Nginx response is chunked abnormally