Comment 6 for bug 1544861

Resurrecting this bug, since we ran into it. It looks like maxconn in HAproxy is a bit more nuanced: the global maxconn setting will cause HAProxy is used to compute the maximum number of socket and file descriptor ulimits, while the listener maxconn is used to limit connections on a specific listener. The global maxconn setting should equal or greater than the sum of the maxconn for each listener. This can be verified by observing the file descriptor limits in /proc/$PID/limits once HAproxy has started.