Ruby Build a Todo List Application with Rails 4 Build a Todo List Application with Rails 4 Generate a Rails Application

Charles-Eric Legras
Charles-Eric Legras
4,917 Points
Posted by Charles-Eric Legras
Charles-Eric Legras
4,917 Points

Localhost:3000 - not available

When I launch bin/rails server

I have this message:

[2015-02-16 17:43:38] INFO WEBrick 1.3.1 [2015-02-16 17:43:38] INFO ruby 2.0.0 (2014-05-08) [universal.x86_64-darwin14] [2015-02-16 17:43:38] WARN TCPServer Error: Address already in use - bind(2) Exiting /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/utils.rb:85:in initialize': Address already in use - bind(2) (Errno::EADDRINUSE) from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/utils.rb:85:innew' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/utils.rb:85:in block in create_listeners' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/utils.rb:82:ineach' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/utils.rb:82:in create_listeners' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/server.rb:132:inlisten' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/server.rb:113:in initialize' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/httpserver.rb:45:ininitialize' from /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/handler/webrick.rb:11:in new' from /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/handler/webrick.rb:11:inrun' from /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:264:in start' from /Library/Ruby/Gems/2.0.0/gems/railties-4.0.2/lib/rails/commands/server.rb:84:instart' from /Library/Ruby/Gems/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:76:in block in <top (required)>' from /Library/Ruby/Gems/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:intap' from /Library/Ruby/Gems/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in <top (required)>' from bin/rails:4:inrequire' from bin/rails:4:in `<main>'

I don't understand why, because I worked when I install the testapp...

Please help

3 Answers

Clayton Perszyk
MOD
Clayton Perszyk
Treehouse Moderator 46,247 Points
Clayton Perszyk
Clayton Perszyk
Treehouse Moderator 46,247 Points

Hi Charles-Erik

It looks like you're running another app on the same port (localhost:3000). You can only run one app per port, so you'll have to shut down the server for the other app.

Jennifer Crawshaw
Jennifer Crawshaw
17,878 Points
Jennifer Crawshaw
Jennifer Crawshaw
17,878 Points

I am having this issue as well, but I do not have any other apps running on that port, they are all shut down. Any suggestions?

Charles-Eric Legras
Charles-Eric Legras
4,917 Points
Charles-Eric Legras
Charles-Eric Legras
4,917 Points

Thank you Clayton !!! You were right !!! :)

Andrew Smith
Andrew Smith
14,330 Points
Andrew Smith
Andrew Smith
14,330 Points

This discussion is a bit old now, but I ran into the same problem today, seemingly out of the blue.

In the OSX console:

lsof -i tcp:3000

Find the port ID (PID) under the resulting listing, then:

kill -9 <PID>

Where PID is the port ID you obtained from running the "lsof" command above. Worked like a charm. Not sure if this syntax would work for Linux or Windows consoles.

I found this solution from Stackoverflow: http://stackoverflow.com/questions/3855127/find-and-kill-process-locking-port-3000-on-mac