Inadequate testing of JMX features

[headius]

We don't have any tests that confirm the JMX endpoints we expose are working. As an example, the remote backtrace generation broke in JRuby 9.2.7.0 when we fixed how exception backtraces are created. I have fixed that in d2875a4, but without tests obviously this and the rest of our mbeans are at risk of regressing again.

This would be a good one for external contributors. You can use Ruby to access JMX directly, or use @enebo's jmx gem for a nicer interface.

[edipofederle]

Hi @headius, allow me to ask you a quick question, I would like to try to work on this one. Could you please give me a quick guide about which JMX endpoints? We are talking here about the https://github.com/jruby/jruby/blob/master/core/src/main/java/org/jruby/management/BeanManager.java methods?

Thanks!