rails server が立ち上がりません

Question

raisl s で起動を試みたのですが
ちゃんと立ち上がりません。
メッセージを見てもさっぱりなので
どなたか教えてください。

ec2-user:/environment/sample_app (master) $ rails s
=> Booting Puma
=> Rails 5.1.4 application starting in development
=> Run rails server -h for more startup options
[13476] Puma starting in cluster mode...
[13476] * Version 3.9.1 (ruby 2.5.1-p57), codename: Private Caller
[13476] * Min threads: 5, max threads: 5
[13476] * Environment: development
[13476] * Process workers: 2
[13476] * Preloading application
[13476] * Listening on tcp://localhost:8080
Exiting
Traceback (most recent call last):
36: from bin/rails:3:in <main>' 35: from bin/rails:3:in load'
34: from /home/ec2-user/environment/sample_app/bin/spring:15:in <top (required)>' 33: from /home/ec2-user/environment/sample_app/bin/spring:15:in require'
32: from /usr/local/rvm/gems/ruby-2.5.1/gems/spring-2.0.2/lib/spring/binstub.rb:31:in <top (required)>' 31: from /usr/local/rvm/gems/ruby-2.5.1/gems/spring-2.0.2/lib/spring/binstub.rb:31:in load'
30: from /usr/local/rvm/gems/ruby-2.5.1/gems/spring-2.0.2/bin/spring:49:in <top (required)>' 29: from /usr/local/rvm/gems/ruby-2.5.1/gems/spring-2.0.2/lib/spring/client.rb:30:in run'
28: from /usr/local/rvm/gems/ruby-2.5.1/gems/spring-2.0.2/lib/spring/client/command.rb:7:in call' 27: from /usr/local/rvm/gems/ruby-2.5.1/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in call'
26: from /usr/local/rvm/gems/ruby-2.5.1/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in load' 25: from /home/ec2-user/environment/sample_app/bin/rails:9:in <top (required)>'
24: from /home/ec2-user/environment/sample_app/bin/rails:9:in require' 23: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.1.4/lib/rails/commands.rb:16:in <top (required)>'
22: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.1.4/lib/rails/command.rb:44:in invoke' 21: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.1.4/lib/rails/command/base.rb:63:in perform'
20: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/gems/2.5.0/gems/thor-0.20.0/lib/thor.rb:387:in dispatch' 19: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/gems/2.5.0/gems/thor-0.20.0/lib/thor/invocation.rb:126:in invoke_command'
18: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/gems/2.5.0/gems/thor-0.20.0/lib/thor/command.rb:27:in run' 17: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:130:in perform'
16: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:130:in tap' 15: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:135:in block in perform'
14: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:44:in start' 13: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/gems/2.5.0/gems/rack-2.0.5/lib/rack/server.rb:297:in start'
12: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/rack/handler/puma.rb:69:in run' 11: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/launcher.rb:174:in run'
10: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/cluster.rb:391:in run' 9: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/runner.rb:144:in load_and_bind'
8: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/binder.rb:88:in parse' 7: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/binder.rb:88:in each'
6: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/binder.rb:105:in block in parse' 5: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/binder.rb:262:in add_tcp_listener'
4: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/binder.rb:262:in each' 3: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/binder.rb:263:in block in add_tcp_listener'
2: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/binder.rb:269:in add_tcp_listener' 1: from /usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/binder.rb:269:in new'
/usr/local/rvm/gems/ruby-2.5.1/gems/puma-3.9.1/lib/puma/binder.rb:269:in `initialize': Address already in use - bind(2) for "127.0.0.1" port 8080 (Errno::EADDRINUSE)
ec2-user:/environment/sample_app (master) $

Answer 1

Address already in use - bind(2) for "127.0.0.1" port 8080 (Errno::EADDRINUSE)
とあるのでportが既に使われているのではないでしょうか。

参考記事
これは5000portなのでここを8080にしてみてはいかがでしょうか。

Step 1: Enter the following linux commend to get the already running process

[root@localhost project-api]# lsof -i :5000
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
ruby 18028 root 11u IPv4 2290593 0t0 TCP localhost.localdomain:commplex-main (LISTEN)

Step 2: Find the process id from the result of the above command and kill that process.

[root@localhost project-api]# kill -9 18028

Comments

[masamasa10]

ご回答ありがとうございます。
Step１とStep 2　はどこに入力するのですか？
全然わかっていなくてすみません。。。

[masamasa10]

ちなみにcloud9を使用しています。

[masamasa10]

解決しました。ありがとうございました。