I am getting this error, can you help me to solve it?

Question

enter image description herefile application.properties

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-02-28 15:25:12.220 ERROR 39244 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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Description:

Web server failed to start. Port 8080 was already in use.

Action:

Identify and stop the process that's listening on port 8080 or configure this application to listen on another port.

I changed the ports in the application.properties file. but still get the same error. At first I ran it automatically, but the next day I ran it again and the problem was like this.. I really don't know how to solve it.

Answer 1

As it says in the error. There is another application running on port 8080.

Select a new port to expose or terminate the other application.

Answer 2

You can try netstat

 netstat -vanp tcp | grep 8080

or Macosx

 lsof -i tcp:8080 

or Linux

 netstat -vanp --tcp | grep 8080

Answer 3

Generally port 8080 is generally used for a Web Server and I believe is the default for local development with Tomcat; so most likely you have something you have developed running on that port still. I've had this before when Intellij crashes and the Tomcat instance isn't stopped.

You can easily kill it by doing the following:

WINDOWS

Step 1: Open up the command console (cmd.exe), depending on your privileges you may need to run in Administrator; run the following command (Replace <PORT> with your port number):

netstat -ano | findstr :<PORT>

this will give you a list of services/processes running on port 8080. What you are interested in is the PID which is a number located at the end.

Step 2: In the same command console run the following command using the PID number (Replace <PID> with your number):

taskkill /PID <PID> /F

Port 8080 should now be free for you to restart your application.

MACOS

For doing the same for MAC please follow this link (Answered copied)

Find out what Process ID (pid) is using the required port (e.g port 5434).

ps aux | grep 5434 Kill that process:

kill -9 <pid>

LINUX

For doing the same for Linux please follow this link (Answered copied)

This fuser 8080/tcp will print you PID of process bound on that port.

And this fuser -k 8080/tcp will kill that process.

Works on Linux only. More universal is use of lsof -i4 (or 6 for IPv6).

Disclaimer: I only checked this on WINDOWS so if using MAC or LINUX and those links worked give credit to those users please.