我正在尝试在Ubuntu平台上为mysql设置我的第一个Rails项目（JRuby）。我使用创建了项目 滑轨新MyFirstRailsProject -d mysql
现在，在使用rails服务器启动rails服务器时，出现以下错误。
rails server
/JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activesupport-3.2.13/lib/active_support/values/time_zone.rb:270: warning: circular argument reference - now
=> Booting WEBrick
=> Rails 3.2.13 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
NoMethodError: undefined method `type_cast_config_to_integer' for ActiveRecord::ConnectionAdapters::Mysql2Adapter:Class
method_missing at org/jruby/RubyBasicObject.java:1657
initialize at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-jdbc-adapter-50.0/lib/arjdbc/abstract/statement_cache.rb:25
initialize at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-jdbc-adapter-50.0/lib/arjdbc/mysql/adapter.rb:34
jdbc_connection at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-jdbc-adapter-50.0/lib/arjdbc/jdbc/connection_methods.rb:15
mysql_connection at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-jdbc-adapter-50.0/lib/arjdbc/mysql/connection_methods.rb:76
new_connection at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:315
checkout_new_connection at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:325
block in checkout at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:247
loop at org/jruby/RubyKernel.java:1316
block in checkout at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:242
mon_synchronize at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/stdlib/monitor.rb:214
checkout at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:239
block in connection at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:102
mon_synchronize at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/stdlib/monitor.rb:214
connection at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:101
retrieve_connection at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:410
retrieve_connection at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:171
connection at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:145
block in Railtie at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activerecord-3.2.13/lib/active_record/railtie.rb:88
instance_exec at org/jruby/RubyBasicObject.java:1728
run at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/railties-3.2.13/lib/rails/initializable.rb:30
block in run_initializers at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/railties-3.2.13/lib/rails/initializable.rb:55
each at org/jruby/RubyArray.java:1735
run_initializers at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/railties-3.2.13/lib/rails/initializable.rb:54
initialize! at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/railties-3.2.13/lib/rails/application.rb:136
method_missing at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/railties-3.2.13/lib/rails/railtie/configurable.rb:30
<main> at /home/jayvijay/RailsTestProject/MyFirstRailsProject/config/environment.rb:5
require at org/jruby/RubyKernel.java:956
block in require at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251
load_dependency at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236
require at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251
block in (root) at /home/jayvijay/RailsTestProject/MyFirstRailsProject/config.ru:1
instance_eval at org/jruby/RubyBasicObject.java:1691
parse_file at /home/jayvijay/RailsTestProject/MyFirstRailsProject/config.ru:3
<eval> at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/rack-1.4.7/lib/rack/builder.rb:51
eval at org/jruby/RubyKernel.java:995
parse_file at /home/jayvijay/RailsTestProject/MyFirstRailsProject/config.ru:1
parse_file at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/rack-1.4.7/lib/rack/builder.rb:40
app at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/rack-1.4.7/lib/rack/server.rb:200
app at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/railties-3.2.13/lib/rails/commands/server.rb:46
wrapped_app at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/rack-1.4.7/lib/rack/server.rb:304
start at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/rack-1.4.7/lib/rack/server.rb:254
block in start at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/railties-3.2.13/lib/rails/commands/server.rb:70
tap at org/jruby/RubyKernel.java:1765
<main> at /JRuby-9.1.17/jruby-9.1.17.0/lib/ruby/gems/shared/gems/railties-3.2.13/lib/rails/commands.rb:55
require at org/jruby/RubyKernel.java:956
<main> at script/rails:6
我不知道我要去哪里。 以下是我的database.yml文件
# MySQL. Versions 4.1 and 5.0 are recommended.
#
# Install the MySQL driver:
# gem install activerecord-jdbcmysql-adapter
#
# Configure Using Gemfile
# gem 'activerecord-jdbcmysql-adapter'
#
# And be sure to use new-style password hashing:
# http://dev.mysql.com/doc/refman/5.0/en/old-client.html
development:
adapter: mysql2
encoding: utf8
database: #MyFirstRailsProject_development
username: username
password: password
host: localhost
port : 3306
socket: /var/run/mysqld/mysqld.sock
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
adapter: mysql2
encoding: utf8
database: #MyFirstRailsProject_test
username: username
password: password
host: localhost
port : 3306
socket: /var/run/mysqld/mysqld.sock
production:
adapter: mysql2
encoding: utf8
database: #MyFirstRailsProject_production
username: username
password: password
host: localhost
port : 3306
socket: /var/run/mysqld/mysql
My SQL Version is:
mysql Ver 14.14 Distrib 5.5.61
JRuby版本：
jruby 9.1.17.0 (2.3.3) 2018-04-20 d8b1ff9
轨道版本
Rails 3.2.13
宝石文件：
source 'https://rubygems.org'
gem 'rails', '3.2.13'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'activerecord-jdbcmysql-adapter'
gem 'jruby-openssl'
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
gem 'therubyrhino'
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'
# To use Jbuilder templates for JSON
# gem 'jbuilder'
# Use unicorn as the app server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger
# gem 'debugger'
请任何人提供建议，我在这里做错了什么？ 是JRuby而不是Ruby->（那会有所作为吗？）