view mod_graceful_shutdown/README.markdown @ 4744:f478855f4565

mod_rest: Stop search when an implied type is determined Optimization only, as the iteration order is undefined. And not much since there's not that many entries in the implied_types map.
author Kim Alvefur <zash@zash.se>
date Thu, 04 Nov 2021 20:13:43 +0100
parents 88474dd1af48
children 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.