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

It happens occasionally that when I restart my computer, everything is OK. Perhaps there is a port conflict.

Restart the computer works because instances of Java or Tomcat are killed during the restart. You can also consider killing the specific processes from Task Manager

This also happens if there is an issue in the context.xml file. In my case, I had accidentally changed the context value.