This is probably a stupid question, but not having much joy researching it myself.

Question

Editorial Team

Asked: May 25, 20262026-05-25T18:16:39+00:00 2026-05-25T18:16:39+00:00

Using JRuby 1.6.4 on OSX (Snow Leopard) installed via rvm.

Can start rails/webrick (rails s) and things seem fine.

Now I want to stop/start rails – how do I do that?

I did the usual Control-C, which looks to kill the rails command – however, as its really running on the background nailgun daemon, its not killed.

If I restart rails now, I get an error about port 3000 in use – its trying to start a second webrick.

If I kill the background daemon (using kill), JRuby then fails to start (connection refused). Starting a new terminal window seems to fix this.

This doesnt seem like the right way to be doing this, but what is?

I have looked at Headius’ guide and the Nailgun project page – but neither go that far…

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Editorial Team · Answer 1 · 2026-05-25T18:16:39+00:00

Editorial Team

This sounds like a known problem.

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