Could not find rack-1.2.3 in any of the sources (Bundler::GemNotFound)

System: Ubuntu, Rails 3.0.10, Apache, Passenger

Why does passenger give me 开发者_StackOverflowthis error message when:

bundle update: 'Using Rack (1.2.3)

and bunble show rack: /home/tonic/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3

Any ideas, would be much appreciated.

It turns out that what worked for me is

bundle install --path vendor/cache

...which is the answer found here.