Assets Precompile not finding gems - ruby-on-rails

Question

I'm trying to use capistrano 3.0 to fully manage my deploy, from bundle install to precompile. However, I keep running into a problem where "RAILS_ENV=production rake assets:precompile" can't seem to find the gems that bundler installed. Here's the output from capistrano:
DEBUG [8d404b6a] Finished in 1.289 seconds with exit status 0 (successful).
INFO [9eb1acdc] Running ~/.rvm/bin/rvm ruby-2.0.0-p247 do bundle --gemfile /var/www/html/FingertipRails/releases/20131127152604/Gemfile --path /home/ec2-user/.rvm/gems/ruby-2.0.0-p247#global --deployment --binstubs /var/www/html/FingertipRails/shared/bin --without development test on 50.112.106.148
DEBUG [9eb1acdc] Command: cd /var/www/html/FingertipRails/releases/20131127152604 && ~/.rvm/bin/rvm ruby-2.0.0-p247 do bundle --gemfile /var/www/html/FingertipRails/releases/20131127152604/Gemfile --path /home/ec2-user/.rvm/gems/ruby-2.0.0-p247#global --deployment --binstubs /var/www/html/FingertipRails/shared/bin --without development test
DEBUG [9eb1acdc] Your bundle is complete!
DEBUG [9eb1acdc] Gems in the groups development and test were not installed.
DEBUG [9eb1acdc] It was installed into /home/ec2-user/.rvm/gems/ruby-2.0.0-p247#global
INFO [9eb1acdc] Finished in 2.892 seconds with exit status 0 (successful).
DEBUG [0de28eb8] Running if test ! -d /var/www/html/FingertipRails/releases/20131127152604; then echo "Directory does not exist '/var/www/html/FingertipRails/releases/20131127152604'" 1>&2; false; fi on 50.112.106.148
DEBUG [0de28eb8] Command: if test ! -d /var/www/html/FingertipRails/releases/20131127152604; then echo "Directory does not exist '/var/www/html/FingertipRails/releases/20131127152604'" 1>&2; false; fi
DEBUG [0de28eb8] Finished in 1.506 seconds with exit status 0 (successful).
INFO [cb071501] Running ~/.rvm/bin/rvm ruby-2.0.0-p247 do rake assets:precompile on 50.112.106.148
DEBUG [cb071501] Command: cd /var/www/html/FingertipRails/releases/20131127152604 && ( RAILS_ENV=production ~/.rvm/bin/rvm ruby-2.0.0-p247 do rake assets:precompile )
DEBUG [cb071501] /home/ec2-user/.rvm/gems/ruby-2.0.0-p247#global/gems/bundler-1.3.5/lib/bundler/spec_set.rb:92:in `block in materialize'
DEBUG [cb071501] :
DEBUG [cb071501] Could not find hashr-0.0.22 in any of the sources
DEBUG [cb071501] (
Here is my staging.rb (I'm using "cap staging deploy"):
set :stage, :staging
set :rails_env, "production"
set :user, "ec2-user"
role :app, %w{50.112.106.148}
role :web, %w{50.112.106.148}
role :db, %w{50.112.106.148}
server '50.112.106.148', user: 'ec2-user', roles: %w{web app}
And here is my deploy.rb:
set :application, 'FingertipRails'
set :repo_url, 'git#github.com:dresources/FingertipRails.git'
set :branch, "master"
set :rvm_type, :user
set :bundle_cmd, "/home/ec2-user/.rvm/gems/ruby-2.0.0-p247#global/bin/bundle"
set :bundle_dir, "/home/ec2-user/.rvm/gems/ruby-2.0.0-p247#global"
set :bundle_flags, '--deployment'
Any ideas?
Thank you
EDIT
Here is the output of rvm info on the server:
ruby-2.0.0-p247:
system:
uname: "Linux ip-10-226-137-104 3.4.62-53.42.amzn1.x86_64 #1 SMP Fri Sep 20 07:23:24 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux"
system: "amazon/2013.09/x86_64"
bash: "/bin/bash => GNU bash, version 4.1.2(1)-release (x86_64-redhat-linux-gnu)"
zsh: " => not installed"
rvm:
version: "rvm 1.23.8 (master) by Wayne E. Seguin <wayneeseguin#gmail.com>, Michal Papis <mpapis#gmail.com> [https://rvm.io/]"
updated: "1 month 10 days 44 minutes 13 seconds ago"
path: "/home/ec2-user/.rvm"
ruby:
interpreter: "ruby"
version: "2.0.0p247"
date: "2013-06-27"
platform: "x86_64-linux"
patchlevel: "2013-06-27 revision 41674"
full_version: "ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-linux]"
homes:
gem: "/home/ec2-user/.rvm/gems/ruby-2.0.0-p247"
ruby: "/home/ec2-user/.rvm/rubies/ruby-2.0.0-p247"
binaries:
ruby: "/home/ec2-user/.rvm/rubies/ruby-2.0.0-p247/bin/ruby"
irb: "/home/ec2-user/.rvm/rubies/ruby-2.0.0-p247/bin/irb"
gem: "/home/ec2-user/.rvm/rubies/ruby-2.0.0-p247/bin/gem"
rake: "/home/ec2-user/.rvm/gems/ruby-2.0.0-p247/bin/rake"
environment:
PATH: "/home/ec2-user/.rvm/gems/ruby-2.0.0-p247/bin:/home/ec2-user/.rvm/gems/ruby-2.0.0-p247#global/bin:/home/ec2-user/.rvm/rubies/ruby-2.0.0-p247/bin:/home/ec2-user/.rvm/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/opt/aws/bin:/home/ec2-user/bin"
GEM_HOME: "/home/ec2-user/.rvm/gems/ruby-2.0.0-p247"
GEM_PATH: "/home/ec2-user/.rvm/gems/ruby-2.0.0-p247:/home/ec2-user/.rvm/gems/ruby-2.0.0-p247#global"
MY_RUBY_HOME: "/home/ec2-user/.rvm/rubies/ruby-2.0.0-p247"
IRBRC: "/home/ec2-user/.rvm/rubies/ruby-2.0.0-p247/.irbrc"
RUBYOPT: ""
gemset: ""

Answer 1

In your Capistrano task, try adding the bundle_cmd variable you've set in your config so that rake assets:precompile runs with bundle exec. Without seeing what other variables you have in your deploy.rb, you'll want to get this line:
DEBUG [cb071501] Command: cd /var/www/html/FingertipRails/releases/20131127152604 && ( RAILS_ENV=production ~/.rvm/bin/rvm ruby-2.0.0-p247 do rake assets:precompile )
... to look more like this:
cd /var/www/html/FingertipRails/releases/20131127152604 && ( RAILS_ENV=production ~/.rvm/bin/rvm ruby-2.0.0-p247 bundle exec rake assets:precompile )