view mod_graceful_shutdown/README.markdown @ 3609:0d4598dacc87

mod_statistics_statsman: Map 'cpu.clock' from mod_measure_cpu to 'cpu_total' of mod_statistics_cputotal
author Kim Alvefur <>
date Tue, 28 May 2019 21:26:13 +0200
parents 88474dd1af48
children 999e7cb7f6d9
line wrap: on
line source

This module is an experiment about a more graceful shutdown process.


When shutting down, a number of sessions, connections and other things
are teared down. Due to all these things happening very quickly,
sometimes e.g. client unavailable notifications don't make it to all
remote contacts because the server-to-server connections are teared down
just after.


This module works by breaking the shutdown process into separate steps
with a brief pause between them.

It goes something like this

1.  Stop accepting new client connections.
2.  Close all client connections.
3.  Fire event for everything else.
4.  Tell `net.server` to quit the main loop.
5.  ???
6.  Still here? Kill itself.