Phusion Passenger Error: You have activated rack 1.2.1, but your Gemfile requires rack 1.2.2

Question

I\'m trying to run a Ruby on Rails app on a Dreamhost shared server. All is well so far except one weird bug I have not been able to unravel.

Sometimes when I visit

Answer 1

My had a similar problem with Apache: "You have already activated rack 1.2.3, but your Gemfile requires rack 1.2.2. Consider using bundle exec."

The problem was that Passenger install rack 1.2.3 and my rails APP rack 1.2.2:

$ gem list |grep rack
rack (1.2.2, 1.2.3)

Try:

$ gem uninstall --version=1.2.3 rack

restart the server and solved

Answer 2

I have the same issue: "You have already activated rack 1.2.1, but your Gemfile requires rack 1.2.3"

1. Add to Gemfile: gem 'rack', '1.2.1'
2. bundle update

3. uninstall rack versions > 1.2.1

   [wasp]$ gem list |grep rack

   rack (1.2.1, 1.1.0, 1.0.1, 1.0.0)

4. touch tmp/restart.txt

5. :) happy

Answer 3

It might be worth checking this out. Someone made a way to get debugger working with Passenger & Rails 3 - http://duckpunching.com/passenger-mod_rails-for-development-now-with-debugger