Execute engine.restart() in thread hangs

I'm working on a user-hosted application that needs to periodically check 
for updates, apply them, then restart.

I have the update checker/installer running in a separate thread, but I 
can't get it to restart the server. It seems as though calling 
cherrypy.engine.restart() inside a child thread makes the server hang 
waiting for that thread to terminate so it can completely shut down. And 
that thread won't terminate until the restart() call finishes.

Is there a good way to call a server restart from a child thread?

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