Where are the logs for a Rails app packed using Warbler?

Question

I'm using Warbler to pack a Rails application into a WAR. I've deployed it to a JBoss server and it seems to works.

However, I'm getting the classic 500 error on Rails saying "We're sorry, but something went wrong.".

Usually, I'd take a look at logs/production.log to find out what's wrong, but since the project is WARed, I can't access it. The question is, where are the logs written when the Rails app gets warbled?

Answer 1

JRuby-Rack, the servlet container adapter that Warbler bundles, is set up by default to redirect Rails logs to the servlet container using the javax.servlet.ServletContext#log method. So exactly where the logs appear is server-specific. For Tomcat, they should be in catalina.out, for GlassFish, server.log.

If you still don't see error messages in the log files, there could be a bug somewhere along the way that is swallowing the error. Feel free to open a problem report for JRuby-Rack at http://kenai.com/jira/browse/JRUBY_RACK.