I dare to respond to this one despite the fact that the post is pretty old.
I think I had the very same issue with "disappearing" logs with JRuby on Rails and I couldn't find nothing except this (unanswered) post. Here's an answer that will hopefully help someone struggling this : Rails.logger is not working correctly (it's level might unpredictably change from time to time) in a threadsafe! environment, read more here : http://log.kares.org/2011/04/railslogger-is-not-threadsafe.html -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.

