Grails: Resolving "Server failed to start for port 8080: Address already in use."

Question

I'm getting this error when trying to resolve "Server failed to start for port 8080: Address already in use"

 Error executing script 8888: For input string: ""

Can anybody help? Don't know what's wrong. Thanks.

Answer 1

When the port number 8080 is already used and you want to reuse the same port , you should kill its process :

First, check the pid of the process that is using port 8080. To do this run:

lsof -w -n -i tcp:8080

In the example above, the pid is 3812 for process that is using port 9090

Take note of the PID. The PID could be different on your machine. We need this for executing the next command:

so you will have to test it via run-app:

grails run-app

UPDATE : As the output of lsof -w -n -i tcp:8080| awk '{print $2}'|awk 'END{print}' is the PID , You can kill the port process by PID automatically :

 kill -9 `lsof -w -n -i tcp:8080| awk '{print $2}'|awk 'END{print}'`

Answer 2

If you're using Grails/Groovy Tool Suite ( Eclipse based IDE ), select Run as > Run Configurations.... Then, in Grails tab, input like this :

-Dserver.port=8050 run-app

So, Grails will run on port 8050 instead of the default port (8080).