WEBrick服务器不断关闭

Question

我是Ruby和Rails的新手，并且第一次设置了一个项目。每次尝试启动WEBrick服务器时，都会启动并关闭。任何帮助，将不胜感激。似乎我需要提供密码，但我不知道如何做到这一点。

bkuethen$ rails s 
=> 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 
/Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/mysql2-0.3.11/lib/mysql2/client.rb:44:in `connect': Access denied for user 'root'@'localhost' (using password: NO) (Mysql2::Error) 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/mysql2-0.3.11/lib/mysql2/client.rb:44:in `initialize' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/mysql2_adapter.rb:16:in `new' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/mysql2_adapter.rb:16:in `mysql2_connection' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:315:in `new_connection' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:325:in `checkout_new_connection' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:247:in `block (2 levels) in checkout' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `loop' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `block in checkout' 
    from /Users/bkuethen/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:239:in `checkout' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:102:in `block in connection' 
    from /Users/bkuethen/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:101:in `connection' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:410:in `retrieve_connection' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:171:in `retrieve_connection' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:145:in `connection' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-3.2.13/lib/active_record/railtie.rb:88:in `block in <class:Railtie>' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `instance_exec' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `run' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/initializable.rb:55:in `block in run_initializers' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `each' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `run_initializers' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/application.rb:136:in `initialize!' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/railtie/configurable.rb:30:in `method_missing' 
    from /Users/bkuethen/Dropbox/Rails Sites/simple_cms/config/environment.rb:5:in `<top (required)>' 
    from /Users/bkuethen/Dropbox/Rails Sites/simple_cms/config.ru:3:in `require' 
    from /Users/bkuethen/Dropbox/Rails Sites/simple_cms/config.ru:3:in `block in <main>' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize' 
    from /Users/bkuethen/Dropbox/Rails Sites/simple_cms/config.ru:in `new' 
    from /Users/bkuethen/Dropbox/Rails Sites/simple_cms/config.ru:in `<main>' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.4.5/lib/rack/server.rb:200:in `app' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/commands/server.rb:46:in `app' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.4.5/lib/rack/server.rb:304:in `wrapped_app' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.4.5/lib/rack/server.rb:254:in `start' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/commands/server.rb:70:in `start' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/commands.rb:55:in `block in <top (required)>' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/commands.rb:50:in `tap' 
    from /Users/bkuethen/.rvm/gems/ruby-2.0.0-p195/gems/railties-3.2.13/lib/rails/commands.rb:50:in `<top (required)>' 
    from script/rails:6:in `require' 
    from script/rails:6:in `<main>' 

宝石

actionmailer (3.2.13) 
actionpack (3.2.13) 
activemodel (3.2.13) 
activerecord (3.2.13) 
activeresource (3.2.13) 
activesupport (3.2.13) 
arel (3.0.2) 
bigdecimal (1.2.0) 
builder (3.0.4) 
bundler (1.3.5) 
coffee-rails (3.2.2) 
coffee-script (2.2.0) 
coffee-script-source (1.6.2) 
erubis (2.7.0) 
execjs (1.4.0) 
hike (1.2.2) 
i18n (0.6.1) 
io-console (0.4.2) 
journey (1.0.4) 
jquery-rails (3.0.0) 
json (1.8.0, 1.7.7) 
mail (2.5.4) 
mime-types (1.23) 
minitest (4.3.2) 
multi_json (1.7.4) 
mysql2 (0.3.11) 
polyglot (0.3.3) 
psych (2.0.0) 
rack (1.4.5) 
rack-cache (1.2) 
rack-ssl (1.3.3) 
rack-test (0.6.2) 
rails (3.2.13) 
railties (3.2.13) 
rake (10.0.4, 0.9.6) 
rdoc (4.0.0, 3.12.2) 
rubygems-bundler (1.1.1) 
rvm (1.11.3.8) 
sass (3.2.9) 
sass-rails (3.2.6) 
sprockets (2.2.2) 
test-unit (2.0.0.0) 
thor (0.18.1) 
tilt (1.4.1) 
treetop (1.4.12) 
tzinfo (0.3.37) 
uglifier (2.1.1) 

更新数据库文件的配置：

# MySQL. Versions 4.1 and 5.0 are recommended. 
# 
# Install the MYSQL driver 
# gem install mysql2 
# 
# Ensure the MySQL gem is defined in your Gemfile 
# gem 'mysql2' 
# 
# 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 
    reconnect: false 
    database: simple_cms_development 
    pool: 5 
    username: root 
    password: 
    socket: /tmp/mysql.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 
    reconnect: false 
    database: simple_cms_test 
    pool: 5 
    username: root 
    password: 
    socket: /tmp/mysql.sock 

production: 
    adapter: mysql2 
    encoding: utf8 
    reconnect: false 
    database: simple_cms_production 
    pool: 5 
    username: root 
    password: 
    socket: /tmp/mysql.sock 

Answer 1

这是从你的堆栈跟踪的第一行的关键信息：

Access denied for user 'root'@'localhost' (using password: NO) 

你有你的root用户的密码设置。您只需将此root密码添加到您的database.yml文件中：

development: 
    ... 
    password: MYPASSWORDHERE 
    ... 

保存该文件，然后重新启动Webrick。

如果您不记得MySQL的根密码，则需要重置它，如here所述。

Answer 2

服务器有访问数据库的问题。你检查你的database.yml，看看配置是否正确？