I upgraded from 1.1.3 to 1.1.5-6. Now, log/nginx/error.log is full of these errors : `2019/02/08 15:00:39 [error] 45#45: *62 connect() failed (111: Connection refused) while connecting to upstream, client: 10.154.yy.xx, server: , request: "POST /render HTTP/1.1", upstream: "http://[::1]:8080/render", host: "xxx.yy.zz"` Nginx tries to connect with ipv6 protocol to graphite-web but it can't : graphite-web is listening in ipv4 only. replace the string "localhost" with "127.0.0.1" in /etc/nginx/sites-enabled/graphite-statsd.conf and theses errors vanish.