Spring Boot application in eclipse, the Tomcat connector configured to listen on port XXXX failed to start

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  1. Find the process ID (PID) for the port (e.g.: 8080)

    On Windows:

    netstat -ao | find "8080"

    Other Platforms other than windows :

    lsof -i:8080

  2. Kill the process ID you found (e.g.: 20712)

    On Windows:

    Taskkill /PID  20712 /F

    Other Platforms other than windows :

    kill -9 20712   or kill 20712

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