Capistrano 3 deployment broke for some reason - ruby-on-rails

Question

Okay,
I'm running into some weird issue with our deployment no longer working anymore. I cannot track everything that changed, but I'm hoping someone can help me out with debugging this issue and find out what is going wrong.
deploy.rb
# config valid only for current version of Capistrano
lock '3.4.0'
set :application, 'app_name'
set :repo_url, 'github_url'
set :deploy_to, '/home/user/path'
# Source Control Configuration
set :scm, :git
# Produces: Please enter the name of the branch. (develop):
set(:branch, ask('the name of the branch.', 'develop'))
# Ask whether we want to perform a backup.
# Produces: Please enter whether to perform a backup of the database? (Y):
set(:backup, ask('whether to perform a backup of the database?', 'Y'))
puts("setting branch to: #{fetch(:branch)}")
set :user, 'my_user'
set :assets_roles, [:web, :app, :vm]
set :keep_assets, 2
set :linked_files, fetch(:linked_files, []).push('.chamber.pem', 'Procfile', '.env')
set :linked_dirs, fetch(:linked_dirs, []).push('data', 'tmp', 'log', 'uploads')
set :keep_releases, 10
set :bundle_path, nil
set :bundle_binstubs, nil
set :bundle_flags, '--system'
set :rvm1_map_bins, fetch(:rvm1_map_bins, []).push('honeybadger')
# Slack integration options
set :slack_via_slackbot, Settings.slack.via_slackbot
set :slack_team, Settings.slack.team
set :slack_token, Settings.slack.token
set :slack_icon_emoji, -> { Settings.slack.icon_emoji }
set :slack_channel, -> { Settings.slack.channel }
set :slack_username, -> { Settings.slack.username }
set :slack_run_starting, -> { Settings.slack.run_starting }
set :slack_run_finished, -> { Settings.slack.run_finished }
set :slack_run_failed, -> { Settings.slack.run_failed }
set :slack_msg_finished, -> { "#channel #{ENV['USER'] || ENV['USERNAME']} has deployed branch *#{fetch :branch}* of #{fetch :application} to *#{fetch :rails_env}*." }
set :slack_msg_failed, -> { "#{ENV['USER'] || ENV['USERNAME']} failed to deploy branch #{fetch :branch} of #{fetch :application} to #{fetch :rails_env, 'production'}." }
# Rake config
SSHKit.config.command_map[:rake] = 'bundle exec rake'
before 'deploy:started', 'deploy:rm:stop'
after 'deploy:rm:stop', 'deploy:rm:backup'
after 'deploy:finished', 'deploy:rm:start'
after 'deploy:migrate', 'deploy:rm:seed
Capfile
# Load DSL and set up stages
require 'capistrano/setup'
require 'capistrano/deploy'
require 'capistrano/rails/assets'
require 'capistrano/rails/migrations'
require 'rvm1/capistrano3' # Do not use capistrano/bundler
require 'whenever/capistrano'
require 'capistrano/honeybadger'
require 'slackistrano/capistrano'
# Load custom tasks from `lib/capistrano/tasks` if you have any defined
Dir.glob('lib/capistrano/tasks/*.rake').each { |r| import r }
require 'net/ssh/proxy/command'
def vm(tunnel:, tunnel_user: fetch(:user), vm_user: fetch(:user))
server "#{fetch(:stage)}-vm01", {
roles: [:vm],
# The user on the VM
user: vm_user,
ssh_options: {
# The user on the machine we're tunneling through
proxy: Net::SSH::Proxy::Command.new("ssh #{tunnel_user}##{tunnel} -W %h:%p"),
}
}
end
So I can run the cap command locally, and it does part of the work. Had some issues first with the new sprockets, but now it's complaining about the following when it needs to precompile the assets:
INFO [21eca199] Running bundle exec rake assets:precompile as riskmethods#playground.riskmethods.net DEBUG [21eca199] Command: cd /home/riskmethods/riskmethods/releases/20160212152030 && ( export RAILS_ENV="playground" ; bundle exec rake assets:precompile )
DEBUG [2eac7a5b] Finished in 0.078 seconds with exit status 0 (successful).
INFO [4b29f0c4] Running bundle exec rake assets:precompile as riskmethods#playground-vm01
DEBUG [4b29f0c4] Command: cd /home/riskmethods/riskmethods/releases/20160212152030 && ( export RAILS_ENV="playground" ; bundle exec rake assets:precompile )
DEBUG [21eca199] bash: bundle: command not found
(Backtrace restricted to imported tasks)
cap aborted!
SSHKit::Runner::ExecuteError: Exception while executing as riskmethods#playground.riskmethods.net: rake exit status: 127
rake stdout: Nothing written
rake stderr: bash: bundle: command not found
SSHKit::Command::Failed:
rake exit status: 127
rake stdout: Nothing written
rake stderr: bash: bundle: command not found
Tasks: TOP => deploy:assets:precompile
(See full trace by running task with --trace)
The deploy has failed with an error:
Exception while executing as riskmethods#playground.riskmethods.net:
rake exit status: 127
rake stdout: Nothing written
rake stderr: bash: bundle: command not found
DEBUG [4b29f0c4] bash: bundle: command not found

Answer 1

As your error message saying bash: bundle: command not found
It seems you dont have the gem bundler installed on the server
install bundler gem on server by running the following command that should do the trick
gem install bundler