I just upgraded from 1.4.20.final to 1.4.21.final and started getting a null pointer exception on boot. Because I print out all the ListenerConfigs.

Looks related to https://github.com/undertow-io/undertow/commit/1cff4f20b2d392ef4dfd9aa153b87dd22c63e5c6#diff-4c852860574c4bf1108c50df9318cfb5R606

Oddly it looks like this commit was pushed after the version bump to 1.4.22.final. I'm not sure if this is a gradle / maven cache issue on my end but it looks like an error either way.