Is there a way to fix Gem::LoadError in Elastic Beanstalk - ruby-on-rails

Question

I'm relatively new to Elastic Beanstalk thus was hoping for some advice. After deploying the RoR app into EB - Puma with Ruby 2.6 running on 64bit Amazon Linux, When I 'Go to environment' link it doesn't render my app. and the health status despite being deployed successfully via CLI change to Degraded with the message below:
50.0 % of the requests to the ELB are failing with HTTP 5xx. Insufficient request rate (1.0 requests/min) to determine application health (5 minutes ago)
After checking my logs I was able to locate Gem::LoadError
/opt/rubies/ruby-2.6.6/lib/ruby/site_ruby/2.6.0/bundler/runtime.rb:312:in `check_for_activated_spec!': You have already activated rack 1.6.8, but your Gemfile requires rack 2.2.3. Prepending `bundle exec` to your command may solve this. (Gem::LoadError)
Here's my Gemfile:
source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby '2.6.6'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 6.0.3', '>= 6.0.3.2'
# Use mysql as the database for Active Record
gem 'mysql2', '>= 0.4.4'
# Use Puma as the app server
gem 'puma', '~> 4.1', groups: [:development, :test]
# Use SCSS for stylesheets
gem 'sass-rails', '>= 6'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 4.0'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use Active Storage variant
# gem 'image_processing', '~> 1.2'
# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.2', require: false
gem 'font-awesome-sass'
#Devise Gem
gem 'devise'
#Pundit Gem
gem 'pundit'
gem "chartkick"
#Install figaro to manage local environment variables. Read more https://github.com/laserlemon/figaro
gem 'figaro'
#Install uickbooks ruby gem. Read more https://github.com/ruckus/quickbooks-ruby
gem 'quickbooks-ruby'
group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end
group :development do
# Access an interactive console on exception pages or by calling 'console' anywhere in the code.
gem 'web-console', '>= 3.3.0'
gem 'listen', '~> 3.2'
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring'
gem 'spring-watcher-listen', '~> 2.0.0'
end
group :test do
# Adds support for Capybara system testing and selenium driver
gem 'capybara', '>= 2.15'
gem 'selenium-webdriver'
# Easy installation and use of web drivers to run system tests with browsers
gem 'webdrivers'
end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
gem 'prawn'
gem 'wicked_pdf'
gem 'wkhtmltopdf-binary'
gem 'xero-ruby'
gem 'sassc', '~> 2.1.0'
My Gemfile.lock looks like this:
GEM
remote: https://rubygems.org/
specs:
actioncable (6.0.3.5)
actionpack (= 6.0.3.5)
nio4r (~> 2.0)
websocket-driver (>= 0.6.1)
actionmailbox (6.0.3.5)
actionpack (= 6.0.3.5)
activejob (= 6.0.3.5)
activerecord (= 6.0.3.5)
activestorage (= 6.0.3.5)
activesupport (= 6.0.3.5)
mail (>= 2.7.1)
actionmailer (6.0.3.5)
actionpack (= 6.0.3.5)
actionview (= 6.0.3.5)
activejob (= 6.0.3.5)
mail (~> 2.5, >= 2.5.4)
rails-dom-testing (~> 2.0)
actionpack (6.0.3.5)
actionview (= 6.0.3.5)
activesupport (= 6.0.3.5)
rack (~> 2.0, >= 2.0.8)
rack-test (>= 0.6.3)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.0, >= 1.2.0)
actiontext (6.0.3.5)
actionpack (= 6.0.3.5)
activerecord (= 6.0.3.5)
activestorage (= 6.0.3.5)
activesupport (= 6.0.3.5)
nokogiri (>= 1.8.5)
actionview (6.0.3.5)
activesupport (= 6.0.3.5)
builder (~> 3.1)
erubi (~> 1.4)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.1, >= 1.2.0)
activejob (6.0.3.5)
activesupport (= 6.0.3.5)
globalid (>= 0.3.6)
activemodel (6.0.3.5)
activesupport (= 6.0.3.5)
activerecord (6.0.3.5)
activemodel (= 6.0.3.5)
activesupport (= 6.0.3.5)
activestorage (6.0.3.5)
actionpack (= 6.0.3.5)
activejob (= 6.0.3.5)
activerecord (= 6.0.3.5)
marcel (~> 0.3.1)
activesupport (6.0.3.5)
concurrent-ruby (~> 1.0, >= 1.0.2)
i18n (>= 0.7, < 2)
minitest (~> 5.1)
tzinfo (~> 1.1)
zeitwerk (~> 2.2, >= 2.2.2)
addressable (2.7.0)
public_suffix (>= 2.0.2, < 5.0)
bcrypt (3.1.16)
bindex (0.8.1)
bootsnap (1.7.2)
msgpack (~> 1.0)
builder (3.2.4)
byebug (11.1.3)
capybara (3.35.3)
addressable
mini_mime (>= 0.1.3)
nokogiri (~> 1.8)
rack (>= 1.6.0)
rack-test (>= 0.6.3)
regexp_parser (>= 1.5, < 3.0)
xpath (~> 3.2)
chartkick (3.4.2)
childprocess (3.0.0)
concurrent-ruby (1.1.8)
crass (1.0.6)
devise (4.7.3)
bcrypt (~> 3.0)
orm_adapter (~> 0.1)
railties (>= 4.1.0)
responders
warden (~> 1.2.3)
erubi (1.10.0)
faraday (1.3.0)
faraday-net_http (~> 1.0)
multipart-post (>= 1.2, < 3)
ruby2_keywords
faraday-net_http (1.0.1)
ffi (1.15.0)
figaro (1.2.0)
thor (>= 0.14.0, < 2)
font-awesome-sass (5.15.1)
sassc (>= 1.11)
globalid (0.4.2)
activesupport (>= 4.2.0)
i18n (1.8.9)
concurrent-ruby (~> 1.0)
jbuilder (2.11.2)
activesupport (>= 5.0.0)
json (2.5.1)
jwt (2.2.2)
listen (3.4.1)
rb-fsevent (~> 0.10, >= 0.10.3)
rb-inotify (~> 0.9, >= 0.9.10)
loofah (2.9.0)
crass (~> 1.0.2)
nokogiri (>= 1.5.9)
mail (2.7.1)
mini_mime (>= 0.1.1)
marcel (0.3.3)
mimemagic (~> 0.3.2)
method_source (1.0.0)
mimemagic (0.3.5)
mini_mime (1.0.2)
mini_portile2 (2.5.0)
minitest (5.14.4)
msgpack (1.4.2)
multi_json (1.15.0)
multi_xml (0.6.0)
multipart-post (2.1.1)
mysql2 (0.5.3)
nio4r (2.5.7)
nokogiri (1.11.1)
mini_portile2 (~> 2.5.0)
racc (~> 1.4)
oauth2 (1.4.4)
faraday (>= 0.8, < 2.0)
jwt (>= 1.0, < 3.0)
multi_json (~> 1.3)
multi_xml (~> 0.5)
rack (>= 1.2, < 3)
orm_adapter (0.5.0)
pdf-core (0.9.0)
prawn (2.4.0)
pdf-core (~> 0.9.0)
ttfunk (~> 1.7)
public_suffix (4.0.6)
puma (4.3.7)
nio4r (~> 2.0)
pundit (2.1.0)
activesupport (>= 3.0.0)
quickbooks-ruby (1.0.15)
activemodel (> 4.0)
multipart-post
nokogiri
oauth2 (~> 1.4)
roxml (~> 4.0)
racc (1.5.2)
rack (2.2.3)
rack-proxy (0.6.5)
rack
rack-test (1.1.0)
rack (>= 1.0, < 3)
rails (6.0.3.5)
actioncable (= 6.0.3.5)
actionmailbox (= 6.0.3.5)
actionmailer (= 6.0.3.5)
actionpack (= 6.0.3.5)
actiontext (= 6.0.3.5)
actionview (= 6.0.3.5)
activejob (= 6.0.3.5)
activemodel (= 6.0.3.5)
activerecord (= 6.0.3.5)
activestorage (= 6.0.3.5)
activesupport (= 6.0.3.5)
bundler (>= 1.3.0)
railties (= 6.0.3.5)
sprockets-rails (>= 2.0.0)
rails-dom-testing (2.0.3)
activesupport (>= 4.2.0)
nokogiri (>= 1.6)
rails-html-sanitizer (1.3.0)
loofah (~> 2.3)
railties (6.0.3.5)
actionpack (= 6.0.3.5)
activesupport (= 6.0.3.5)
method_source
rake (>= 0.8.7)
thor (>= 0.20.3, < 2.0)
rake (13.0.3)
rb-fsevent (0.10.4)
rb-inotify (0.10.1)
ffi (~> 1.0)
regexp_parser (2.1.1)
responders (3.0.1)
actionpack (>= 5.0)
railties (>= 5.0)
roxml (4.1.1)
activesupport (>= 4.0)
nokogiri (>= 1.3.3)
ruby2_keywords (0.0.4)
rubyzip (2.3.0)
sass-rails (6.0.0)
sassc-rails (~> 2.1, >= 2.1.1)
sassc (2.1.0)
ffi (~> 1.9)
sassc-rails (2.1.2)
railties (>= 4.0.0)
sassc (>= 2.0)
sprockets (> 3.0)
sprockets-rails
tilt
selenium-webdriver (3.142.7)
childprocess (>= 0.5, < 4.0)
rubyzip (>= 1.2.2)
spring (2.1.1)
spring-watcher-listen (2.0.1)
listen (>= 2.7, < 4.0)
spring (>= 1.2, < 3.0)
sprockets (4.0.2)
concurrent-ruby (~> 1.0)
rack (> 1, < 3)
sprockets-rails (3.2.2)
actionpack (>= 4.0)
activesupport (>= 4.0)
sprockets (>= 3.0.0)
thor (1.1.0)
thread_safe (0.3.6)
tilt (2.0.10)
ttfunk (1.7.0)
turbolinks (5.2.1)
turbolinks-source (~> 5.2)
turbolinks-source (5.2.0)
tzinfo (1.2.9)
thread_safe (~> 0.1)
warden (1.2.9)
rack (>= 2.0.9)
web-console (4.1.0)
actionview (>= 6.0.0)
activemodel (>= 6.0.0)
bindex (>= 0.4.0)
railties (>= 6.0.0)
webdrivers (4.6.0)
nokogiri (~> 1.6)
rubyzip (>= 1.3.0)
selenium-webdriver (>= 3.0, < 4.0)
webpacker (4.3.0)
activesupport (>= 4.2)
rack-proxy (>= 0.6.1)
railties (>= 4.2)
websocket-driver (0.7.3)
websocket-extensions (>= 0.1.0)
websocket-extensions (0.1.5)
wicked_pdf (2.1.0)
activesupport
wkhtmltopdf-binary (0.12.6.5)
xero-ruby (2.8.0)
faraday (~> 1.0, >= 1.0.1)
json (~> 2.1, >= 2.1.0)
xpath (3.2.0)
nokogiri (~> 1.8)
zeitwerk (2.4.2)
PLATFORMS
ruby
DEPENDENCIES
bootsnap (>= 1.4.2)
byebug
capybara (>= 2.15)
chartkick
devise
figaro
font-awesome-sass
jbuilder (~> 2.7)
listen (~> 3.2)
mysql2 (>= 0.4.4)
prawn
puma (~> 4.1)
pundit
quickbooks-ruby
rails (~> 6.0.3, >= 6.0.3.2)
sass-rails (>= 6)
sassc (~> 2.1.0)
selenium-webdriver
spring
spring-watcher-listen (~> 2.0.0)
turbolinks (~> 5)
tzinfo-data
web-console (>= 3.3.0)
webdrivers
webpacker (~> 4.0)
wicked_pdf
wkhtmltopdf-binary
xero-ruby
RUBY VERSION
ruby 2.6.6p146
BUNDLED WITH
2.2.13
I have also created 2 extension files
nginx_timeout.config :
"/etc/nginx/conf.d/custom_nginx.conf":
content: |
keepalive_timeout 600;
proxy_connect_timeout 600;
proxy_send_timeout 600;
proxy_read_timeout 600;
send_timeout 600;
and Packages.config :
# These are things that make sense for any Ruby application
# Install git in order to be able to bundle gems from git
packages:
yum:
git: []
patch: []
commands:
#01 && 02 needs for build native extension. See https://forums.aws.amazon.com/thread.jspa?messageID=550901&#550053
01_bundlerfix_command:
test: test ! -f /opt/elasticbeanstalk/containerfiles/.post-provisioning-complete
command: gem install rubygems-update -v '<3'
leader_only: false
02_update_rubygems:
test: test ! -f /opt/elasticbeanstalk/containerfiles/.post-provisioning-complete
command: $(which update_rubygems)
leader_only: false
# Run rake with bundle exec to be sure you get the right version
add_bundle_exec:
test: test ! -f /opt/elasticbeanstalk/support/.post-provisioning-complete
cwd: /opt/elasticbeanstalk/hooks/appdeploy/pre
# 複数マッチ対応と上書き防止(後読み)
command: perl -pi -e 's/((?<!bundle exec )rake)/bundle exec $1/g' 11_asset_compilation.sh 12_db_migration.sh
# Bundle with --deployment as recommended by bundler docs
# cf. http://gembundler.com/v1.2/rationale.html under Deploying Your Application
add_deployment_flag:
test: test ! -f /opt/elasticbeanstalk/support/.post-provisioning-complete
cwd: /opt/elasticbeanstalk/hooks/appdeploy/pre
# 複数マッチ対応と上書き防止(先読み)
command: perl -pi -e 's/(bundle install(?! --deployment))/$1 --deployment/' 10_bundle_install.sh
# Vendor gems to a persistent directory for speedy subsequent bundling
make_vendor_bundle_dir:
test: test ! -f /opt/elasticbeanstalk/support/.post-provisioning-complete
command: mkdir -p /var/app/support/vendor_bundle
# Store the location of vendored gems in a handy env var
set_vendor_bundle_var:
test: test ! -f /opt/elasticbeanstalk/support/.post-provisioning-complete
cwd: /opt/elasticbeanstalk/support
command: sed -i '12iexport EB_CONFIG_APP_VENDOR_BUNDLE=$EB_CONFIG_APP_SUPPORT/vendor_bundle' envvars
# The --deployment flag tells bundler to install gems to vendor/bundle/, so
# symlink that to the persistent directory
symlink_vendor_bundle:
test: test ! -f /opt/elasticbeanstalk/support/.post-provisioning-complete
cwd: /opt/elasticbeanstalk/hooks/appdeploy/pre
command: sed -i 's/\(^cd $EB_CONFIG_APP_ONDECK\)/\1\nln -s $EB_CONFIG_APP_VENDOR_BUNDLE .\/vendor\/bundle/' 10_bundle_install.sh
# Don't run the above commands again on this instance
# cf. http://stackoverflow.com/a/16846429/283398
z_write_post_provisioning_complete_file:
cwd: /opt/elasticbeanstalk/support
command: touch .post-provisioning-complete
Any ideas what can cause the issue?

Answer 1

Possibly, unless there are any other problems, locking rack to 1.6.8 in your Gemfile will solve the problem.
I'm using Elastic Beanstalk in a project myself and I often regret this choice. Every time there's a platform update, I need to lock the nio4r gem to a specific version required for that platform. Also puma. It's a hassle.
As you can see others who encounter this problem too, we're not alone ;)
E.g. https://forums.aws.amazon.com/thread.jspa?messageID=957426.
I haven't found a better solution so far but then again I haven't invested a whole lot of time trying to. Let me know if you do ;)