Scheduled future executions fail w/ NPEs [Netty]

[snazy]

Version

4.5.x

Context

Raising this issue here for awareness: netty/netty#15492

Steps to reproduce

Reproducer in the Netty issue.

[geoand]

cc @franz1981

[snazy]

For posterity: the issue is fixed in Netty for 4.1 (4.2 isn't affected).

[vietj]

thanks @snazy let's keep this open until we can integrate the Netty release fixing it