Mailcatcher错误：~~>错误：有东西正在使用端口1025.您是否已经在运行MailCatcher？

我已经安装了gem mailcatcher。 当我想运行mailcatcher时，我有以下错误消息：

$ mailcatcher /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::BASE /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of BASE was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_ALL /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of EXCEPTION_ALL was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_NaN /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of EXCEPTION_NaN was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_INFINITY /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of EXCEPTION_INFINITY was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_UNDERFLOW /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of EXCEPTION_UNDERFLOW was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_OVERFLOW /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of EXCEPTION_OVERFLOW was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_ZERODIVIDE /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of EXCEPTION_ZERODIVIDE was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_MODE /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of ROUND_MODE was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_UP /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of ROUND_UP was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_DOWN /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of ROUND_DOWN was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_HALF_UP /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of ROUND_HALF_UP was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_HALF_DOWN /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of ROUND_HALF_DOWN was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_CEILING /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of ROUND_CEILING was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_FLOOR /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of ROUND_FLOOR was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_HALF_EVEN /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of ROUND_HALF_EVEN was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_NaN /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of SIGN_NaN was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_POSITIVE_ZERO /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of SIGN_POSITIVE_ZERO was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_NEGATIVE_ZERO /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of SIGN_NEGATIVE_ZERO was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_POSITIVE_FINITE /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of SIGN_POSITIVE_FINITE was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_NEGATIVE_FINITE /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of SIGN_NEGATIVE_FINITE was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_POSITIVE_INFINITE /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of SIGN_POSITIVE_INFINITE was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_NEGATIVE_INFINITE /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of SIGN_NEGATIVE_INFINITE was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::INFINITY /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of INFINITY was here /Users/romenigld/.rvm/gems/ruby-2.2.3@global/extensions/x86_64-darwin-14/2.2.0-static/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::NAN /Users/romenigld/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121: warning: previous definition of NAN was here Starting MailCatcher ~~> ERROR: Something's using port 1025. Are you already running MailCatcher? 

然后，当我尝试使用http://localhost:1080/向我显示应用程序mailcatcher。 但我需要做的应用程序不再显示此错误？

Answer 1

似乎在那个端口上运行了一些东西。 它可以是mailcatcher的另一个实例，或者其他一些进程。

在大多数* nix系统上，您可以使用以下命令搜索占用特定端口的进程：

 lsof -i :PORT 

例如：

 lsof -i :1025 

结果将包含PID（进程ID）。 您可以使用它来杀死有问题的进程。

 kill -9 SOME_PID 

例：

 kill -9 32487