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Port 8080 is already in use in eclipse

I am trying to run the Spring MVC demo file on Eclipse oxygen , when I click the start button like> run on server it shows the following error after a moment

Port 8080 required by Tomcat v8.5 The server on localhost is already in use. The server may be running in a different process, or the system process may be using the port. To start this server you need to stop another process or change port numbers

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The process is already listening on port 8080 and you cannot listen to multiple processes on the same port.

You have two options :



  • Kill an existing process if it is not useful netstat -tulpn | grep :8080

  • Change the application port. In your applications .properties and file add this lineserver.port=8081

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Step 1: (open CMD command)

  C:\Users\username>netstat -o -n -a | findstr 0.0:8080

  TCP 0.0.0.0:3000 0.0.0.0:0 LISTENING 3116

  Now , we can see that LISTENING port is 3116 for 8080 ,

  We need to kill 3116 now

Step 2: -



 C:\Users\username>taskkill /F /PID 3116

 Step 3: Go to Eclipse and start Server , it will run

OR

 you can change port number in folder  servers>Tomcat>server.xml
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in the apache conf folder, open the httpd file and look at port 8080. Change 8080 to whatever port you like. I believe you will find 8080 in two places.

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please remove java process from task manager if Windows, otherwise if Linux system kill -9 tomcat

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You can simply change the default port of your Tomcat server if the problem persists.

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Always kill the process before deploying your war file to tomcat

ps -A|grep tomcat

The entire tomcat process will be listed. Write down the PID and run

KILL <PID>

Cross validation ps -A|grep tomcat

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You can go to the file server> server.xml .in server.xml which you must change like, step 1) step 2) step 3) < Connector port = "8010" protocol = "AJP / 1.3" redirectPort = "8443 "/> and save your changes.

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