how to release localhost from Error: listen EADDRINUSE

Question

i am testing a server written in nodejs on windows 7 and when i try to run the tester in the command line i get the following error

Error: listen EADDRINUSE
         


        

Answer 1

I created 2 servers, listening on same port 8081, running from same code, while learning

1st server creation shud have worked 2nd server creation failed with EADDRINUSE

node.js callback delays might be reason behind neither worked, or 2nd server creation had exception, and program exited, so 1st server is also closed

2 server issue hint, I got from: How to fix Error: listen EADDRINUSE while using nodejs?