Idea에서 갑자기 Error running portal: Unable to open debugger port 에러 발생할 때

idea실행 중 갑자기 밑에 에러가 발생

오후 4:31:57 Error running portal: Cannot run program "C:\DEV\Was\apache-tomcat-6.0.37\bin\catalina.bat" (in directory "C:\DEV\Was\apache-tomcat-6.0.37\bin"): CreateProcess error=87, ¸Ű³ º¯¼

오후 4:32:00 Error running portal: Unable to open debugger port : java.net.SocketException "socket closed"

열심히 구글로 찾아보다가 원인을 발견했다.

It looks like I found out where was the problem.
A project has dialog “Edit Configuration” (dialog’s title - Run/Debug Configuration). The dialog has 5 tabs. Last right tab (‘Startup/Connection’) provides possibility to describe environment variables to pass it to Java machine. For ‘Debug’ mode by default is set ‘JAVA_OPTS’. But for ‘Run’ mode there is one empty line only (without any values). Just I put focus and removed that empty line - the problem is gone. It is easy to reproduce. I didn’t add any empty line myself. Possible this is little IDEA bug.
On the other hand I can’t reproduce the problem under Win XP. Possible the reason is – my Win XP has external environment variable ‘JAVA_OPTS’ with memory setting. So, empty line doesn’t add any problems.

즉! Run/Debug Configuration 다이얼로그 창으로 가서 5번째 Startup/Connection 텝을 선택
Debug 선택 후 Pass environment variables 밑에 리스트화면에서 빈 로우를 제거해줘야 된다.