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Address already in use - bind(2) for "127.0.0.1" port 3000 (Errno::EADDRINUSE)がターミナルで出た

Rails

Posted at 2021-05-21

対処

起動しているポートを検索

起動している一覧表示コマンド

% lsof -i:3000

起動している一覧

COMMAND  PID       USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
ruby    7251 maedatakuo   13u  IPv4 0x523a717e82b7309f      0t0  TCP localhost:hbci (LISTEN)
ruby    7251 maedatakuo   14u  IPv6 0x523a717e7674b30f      0t0  TCP localhost:hbci (LISTEN)
ruby    7251 maedatakuo   25u  IPv6 0x523a717e82ea364f      0t0  TCP localhost:hbci->localhost:52804 (CLOSE_WAIT)
ruby    7251 maedatakuo   26u  IPv6 0x523a717e7674a64f      0t0  TCP localhost:hbci->localhost:52810 (CLOSE_WAIT)
ruby    7251 maedatakuo   28u  IPv6 0x523a717e82ea3caf      0t0  TCP localhost:hbci->localhost:52811 (CLOSE_WAIT)
ruby    7251 maedatakuo   29u  IPv6 0x523a717e8136d96f      0t0  TCP localhost:hbci->localhost:52817 (CLOSE_WAIT)

起動ポートを閉じるコマンド

% kill -9 (ポート名)

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