view mod_graceful_shutdown/README.markdown @ 2589:89a3f049689f

mod_http_muc_log/README: Add some text about the HTML template
author Kim Alvefur <zash@zash.se>
date Wed, 01 Mar 2017 20:29:07 +0100
parents 4652a112a4ba
children 88474dd1af48
line wrap: on
line source

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

Why
===

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

How
===

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.