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Unable to run my project

I am just learning Springboot, following instruction from internet I set up a new project, I use Eclipse Oxygen + Maven (with Embedded Tomcat) + Springboot , I followed the instruction to run the project, but got following error message. I changed the port many times by revising "application.properties" file, but it didn't work. I checked all the ports, their states are "listening".

2019-07-03 04:04:16.256 ERROR 16132 --- [ main] org.apache.catalina.util.LifecycleBase : Failed to start component [Connector[HTTP/1.1-17500]]

org.apache.catalina.LifecycleException: Protocol handler start failed at org.apache.catalina.connector.Connector.startInternal(Connector.java:1001) ~[tomcat-embed-core-9.0.13.jar:9.0.13]

APPLICATION FAILED TO START

Description:

The Tomcat connector configured to listen on port 8080 failed to start. The port may already be in use or the connector may be misconfigured.

zukijuki
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Terry Yue
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2 Answers2

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Check Listening Port

Make sure that new port you are going to set is not being used by other processes. You can check the listening port as below

After Changing the port, Close and Reopen the Project and do Clean, Rebuild your Project.

PowerShell

Get-Process -Id (Get-NetTCPConnection -LocalPort portNumber).OwningProcess

cmd

 C:\> netstat -a -b

Solution

Kill Process on Port 8080 from cmd

netstat -ano | findstr :<yourPortNumber>
taskkill /PID <typeyourPIDhere> /F

OR Change the Port

Update via a properties file.

server.port=8888 # Server HTTP port.

Update via a yaml file.

server:
  port: 8888
Patel Romil
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confirm To you can not use Same Port "8080" More Then One Application And also confirm to another application is not using same port (Example:- you are going to run your application on Spring with Port 8080 and in Background Another application already was allocated port like XAMPP OR WAPP)

AMAR MAGAR
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  • you can also change the Tomcat Port Number:- Right click on Tomcat Server Then Click on Properties Option now you can able to see all port number , now you can change port number and Restart and Run your Application – AMAR MAGAR Jul 04 '19 at 04:14