ruby-on-rails - Rails parallel_tests 与 RSpec 请求规范 : Address already in use error

Question

当我尝试使用 parallel_tests Gem 并行运行我的规范时，我收到以下错误消息:

foo:~/Projects/cucumber-capybara-saucelabs/spec/requests [] ➜ rake parallel:spec
(in /Volumes/Storage/Projects/cucumber-capybara-saucelabs)
8 processes for 5 specs, ~ 0 specs per process
Starting Rails server on port 3001...
Starting Rails server on port 3001...
Starting Rails server on port 3001...
Starting Rails server on port 3001...
Starting Rails server on port 3001...
[2013-05-22 14:40:12] INFO  WEBrick 1.3.1
[2013-05-22 14:40:12] INFO  ruby 1.9.3 (2013-02-22) [x86_64-darwin12.3.0]
[2013-05-22 14:40:12] INFO  WEBrick::HTTPServer#start: pid=33256 port=3001
Rails server running!
Rails server running!
Rails server running!
Rails server running!
[2013-05-22 14:40:12] INFO  WEBrick 1.3.1
[2013-05-22 14:40:12] INFO  WEBrick 1.3.1
[2013-05-22 14:40:12] INFO  ruby 1.9.3 (2013-02-22) [x86_64-darwin12.3.0]
[2013-05-22 14:40:12] INFO  WEBrick 1.3.1
[2013-05-22 14:40:12] INFO  ruby 1.9.3 (2013-02-22) [x86_64-darwin12.3.0]
[2013-05-22 14:40:12] INFO  ruby 1.9.3 (2013-02-22) [x86_64-darwin12.3.0]
[2013-05-22 14:40:12] WARN  TCPServer Error: Address already in use - bind(2)
[2013-05-22 14:40:12] WARN  TCPServer Error: Address already in use - bind(2)
[2013-05-22 14:40:12] WARN  TCPServer Error: Address already in use - bind(2)
/Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/utils.rb:85:in `initialize': Address already in use - bind(2) (/Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/utils.rb:85:in `initialize': Address already in use - bind(2) (Errno::EADDRINUSE)
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/utils.rb:85:in `new'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/utils.rb:85:in `block in create_listeners'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/utils.rb:82:in `each'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/utils.rb:82:in `create_listeners'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/server.rb:82:in `listen'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/server.rb:70:in `initialize'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/httpserver.rb:45:in `initialize'
    from /Users/foo/.rvm/gems/ruby-1.9.3-p392@rails-3/gems/rack-1.4.5/lib/rack/handler/webrick.rb:10:in `new'
    from /Users/foo/.rvm/Users/foo/.rvm/gems/ruby-1.9.3-p392@rails-3/gems/rack-1.4.5/lib/rack/server.rb:323:in `delete': No such file or directory - /Volumes/Storage/Projects/cucumber-capybara-saucelabs/tmp/pids/server.pid (Errno::ENOENT)
    from /Users/foo/.rvm/gems/ruby-1.9.3-p392@rails-3/gems/rack-1.4.5/lib/rack/server.rb:323:in `block in write_pid'
/Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/utils.rb:85:in `initialize': Address already in use - bind(2) (Errno::EADDRINUSE)
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/utils.rb:85:in `new'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/utils.rb:85:in `block in create_listeners'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/utils.rb:82:in `each'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/utils.rb:82:in `create_listeners'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/server.rb:82:in `listen'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/server.rb:70:in `initialize'
    from /Users/foo/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/httpserver.rb:45:in `initialize'
    from /Users/foo[2013-05-22 14:40:12] INFO  WEBrick 1.3.1
sa/.rvm/gems/ruby-1.9.3-p392@rails-3/gems/rack-1.4.5/lib/rack/handler/webrick.rb:10:in `new'
    from /Users/foo/.rvm/gems/ruby-1.9.3-p392@rails-3/gems/rack-1.4.5/lib/rack/handler/webrick.rb:10:in `run'
    from /Users/foo/.rvm/gems/ruby-1.9.3-p392@rails-3/gems/rack-1.4.5/lib/rack/server.rb:268:in `start'
    from /Users/foo/.rvm/gems/ruby-1.9.3-p392@rails-3/gems/railties-3.2.13/lib/rails/commands/server.rb:70:in `start'
    from /Users/foo/.rvm/gems/ruby-1.9.3-p392@rails-3/gems/railties-3.2.13/lib/rails/commands.rb:55:in `block in <top (required)>'
    from /Users/foo/.rvm/gems/ruby-1.9.3-p392@rails-3/gems/railties-3.2.13/lib/rails/commands.rb:50:in `tap'
    from /Users/foo/.rvm/gems/ruby-1.9.3-p392@rails-3/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>'

有没有办法避免这种情况？

Answer 1

如 wiki 中所述，你需要做的:

Capybara.server_port = 9887 + ENV['TEST_ENV_NUMBER'].to_i