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mod_graceful_shutdown/README.markdown @ 3556:0d97cde1c7b0

mod_adhoc_dataforms_demo: Reorder form fields Group similar fields and order by complexity
author Kim Alvefur <zash@zash.se>
date Sat, 06 Apr 2019 18:07:02 +0200
parent 2818:88474dd1af48
child 4898:999e7cb7f6d9
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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 e.g. 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.