view mod_graceful_shutdown/README.markdown @ 3500:e86315c9b5c4

offline_hints: discard no-store hinted messages at mod_offline This module will hook `message/offline/handle` and will skip offline storage for messages hinted with `no-store` or `no-permanent-store`.
author marc0s <marcos.devera@quobis.com>
date Fri, 29 Mar 2019 17:06:18 +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.