Could not find cache store adapter for memory_store - ruby-on-rails-3

Question

For some reason anytime I'm running a Rails 3.0.3 application with Ruby 1.8.7. It's been running fine and I haven't set any cache_store settings anywhere. Now anytime I try to run rake tasks or rails command I get this:
$:rails console production
/home/marc_m3pt0/.gems/gems/activesupport-3.0.3/lib/active_support/cache.rb:65:in `lookup_store': Could not find cache store adapter for memory_store (no such file to load -- active_support/cache/memory_store) (RuntimeError)
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/application/bootstrap.rb:48
from /home/marc_m3pt0/.gems/gems/activesupport-3.0.3/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
from /home/marc_m3pt0/.gems/gems/activesupport-3.0.3/lib/active_support/core_ext/kernel/reporting.rb:22:in `with_warnings'
from /home/marc_m3pt0/.gems/gems/activesupport-3.0.3/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/application/bootstrap.rb:48
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/initializable.rb:25:in `instance_exec'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/initializable.rb:25:in `run'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/initializable.rb:50:in `run_initializers'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/initializable.rb:49:in `each'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/initializable.rb:49:in `run_initializers'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/application.rb:134:in `initialize!'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/application.rb:77:in `send'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/application.rb:77:in `method_missing'
from /home/marc_m3pt0/m3pt0.com/config/environment.rb:5
from /home/marc_m3pt0/.gems/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:239:in `require'
from /home/marc_m3pt0/.gems/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:239:in `require'
from /home/marc_m3pt0/.gems/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:225:in `load_dependency'
from /home/marc_m3pt0/.gems/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:596:in `new_constants_in'
from /home/marc_m3pt0/.gems/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:225:in `load_dependency'
from /home/marc_m3pt0/.gems/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:239:in `require'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/application.rb:103:in `require_environment!'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.3/lib/rails/commands.rb:22
from script/rails:6:in `require'
from script/rails:6
Any ideas on what I could be missing?
Thanks so much. My clients site is down right now so any help soon would be appreciated.
UPDATE
When I run rake tasks I get this:
Could not find cache store adapter for memory_store (no such file to load -- active_support/cache/memory_store)

Answer 1

I saw this error recently when a shared host moved an application to a new server. I ended up blowing away the application's bundle and reinstalling it, and it seemed to work.
I use Capistrano for deployment, so if you use something else, YMMV. If your application root is this:
/home/jeff/myapp/
with the following subdirectories:
/home/jeff/myapp/current
/home/jeff/myapp/releases
/home/jeff/myapp/shared
the gem bundle is here:
/home/jeff/myapp/shared/bundle
Then I did:
rm -rf /home/jeff/myapp/shared/bundle
then
cd /home/jeff/myapp
bundle install
Once I did this, it seemed to work for me.