Tomcat Server Cannot assign requested address: connect

Question

I'm trying to run a spring boot application but the embedded Tomcat keeps on experiencing an error. I've tried changing the port to any unused port number.

Attaching most of the logs for your reference:

   Caused by: java.net.BindException: Cannot assign requested address: connect
        at java.base/sun.nio.ch.Net.connect0(Native Method) ~[na:na]
        at java.base/sun.nio.ch.Net.connect(Net.java:454) ~[na:na]
        at java.base/sun.nio.ch.Net.connect(Net.java:446) ~[na:na]
        at java.base/sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648) ~[na:na]
        at java.base/java.nio.channels.SocketChannel.open(SocketChannel.java:194) ~[na:na]
        at java.base/sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:127) ~[na:na]
        at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:76) ~[na:na]
        ... 35 common frames omitted

Answer 1

It probably is because another process is using the two ports you've tried.

Did you tried to list the ports that are being used?

On MacOS you can try running this in your terminal:

lsof -nP  | grep LISTEN

If you are using Windows, you can run this in your powershell:

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