New to Ruby language and installed Ruby and rails on Windows 8.1 but when rails server it throw following error

Question

=> Booting Puma
=> Rails 5.1.6 application starting in development
=> Run `rails server -h` for more startup options
*** SIGUSR2 not implemented, signal based restart unavailable!
*** SIGUSR1 not implemented, signal based restart unavailable!
*** SIGHUP not implemented, signal based logs reopening unavailable!
Puma starting in single mode...
* Version 3.12.0 (ruby 2.3.3-p222), codename: Llamas in Pajamas
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://0.0.0.0:3000
Exiting
G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/puma-3.12.0/lib/
puma/binder.rb:272:in `initialize': Only one usage of each socket address (proto
col/network address/port) is normally permitted. - bind(2) for "0.0.0.0" port 30
00 (Errno::EADDRINUSE)
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/pum
a-3.12.0/lib/puma/binder.rb:272:in `new'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/pum
a-3.12.0/lib/puma/binder.rb:272:in `add_tcp_listener'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/pum
a-3.12.0/lib/puma/binder.rb:105:in `block in parse'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/pum
a-3.12.0/lib/puma/binder.rb:88:in `each'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/pum
a-3.12.0/lib/puma/binder.rb:88:in `parse'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/pum
a-3.12.0/lib/puma/runner.rb:151:in `load_and_bind'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/pum
a-3.12.0/lib/puma/single.rb:96:in `run'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/pum
a-3.12.0/lib/puma/launcher.rb:184:in `run'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/pum
a-3.12.0/lib/rack/handler/puma.rb:70:in `run'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/rac
k-2.0.5/lib/rack/server.rb:297:in `start'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/rai
lties-5.1.6/lib/rails/commands/server/server_command.rb:44:in `start'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/rai
lties-5.1.6/lib/rails/commands/server/server_command.rb:135:in `block in perform
'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/rai
lties-5.1.6/lib/rails/commands/server/server_command.rb:130:in `tap'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/rai
lties-5.1.6/lib/rails/commands/server/server_command.rb:130:in `perform'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/tho
r-0.20.0/lib/thor/command.rb:27:in `run'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/tho
r-0.20.0/lib/thor/invocation.rb:126:in `invoke_command'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/tho
r-0.20.0/lib/thor.rb:387:in `dispatch'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/rai
lties-5.1.6/lib/rails/command/base.rb:63:in `perform'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/rai
lties-5.1.6/lib/rails/command.rb:44:in `invoke'
        from G:/xampp/ruby/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/rai
lties-5.1.6/lib/rails/commands.rb:16:in `<top (required)>'
        from bin/rails:4:in `require'
        from bin/rails:4:in `<main>'

but when i run http://localhost:3000 it show This site can’t be reached

Answer 1

Errno::EADDRINUSE says that the socket is already in use. It means that you have started puma already. You need to stop all previous puma instances before starting it again. See

How to find a list of sockets

How to close a tcp port