Unable to open debugger port in IntelliJ IDEA

Question

I have a problem that I can not set up my application in debug mode with IntelliJ IDE, but run mode is OK.

My OS is Windows 7, IDE is IntelliJ IDEA, web container is Tom

Answer 1

In my case I had another project open in IntelliJ, and had Tomcat running in debug mode in that project. Stopping that instance of Tomcat resolved the issue.