How do I cleanly shut down an embedded JRuby in response to a SIGTERM to the JVM process?

Question

I am running a Middleman (which uses Webrick) server on JRuby inside a JVM process using the org.jruby.embed.ScriptingContainer API.

If I shutdown cleanly a

Answer 1

Looks like kill -9 does not trigger the shutdownHook, but kill -15 does.

This StackOverflow question has a detailed answer to the same problem.

Bottom line is, you're screwed, as there doesn't seem to exist any way to intercept a kill -9 signal and perform some maintenance tasks before the JVM halts.