JRubyRack and tomcat hung out about jruby-rack HOT 2 CLOSED

This is most likely a class-loader issue, although I'm not necessarily 100% sure.
I do have a previous similar experience with trinidad (uses tomcat 7) while doing hot redeploys of a non-trivial rails app.
I even did some heap dumping trying to resolve this, I found a "static" variable candidate in JRuby itself but fixing it still wasn't enough. Than I couldn't get my head into what might still be holding back memory from being released and I stopped digging.

I guess we're going to need a minimal Rails app setup where we can easily explore this further.

If you're redeploying the war, than doing a tomcat restart each time you deploy might avoid this, or assign the server more memory and restart it once every 3 hot deploys if you need to avoid restarts as much as possible.
Sorry for any inconvenience, but this is an old Java class-loading hustle, in this case it even might be tomcat specific.
If you find out any additional info or have log outputs where stack traces are printer out, feel welcome to comment.

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I'm experiencing the same thing with tomcat 8 now, do you have any more ideas?

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