Analysis Node.js Connect econnrefused Error _ Basic knowledge

I recently encountered this error in my Mac development when preparing Angularjs +node.js demo, as follows:

events.js:71

Throw arguments[1]; Unhandled ' ERROR ' event

^

Error:connect econnrefused

At Errnoexception (net.js:770:11)

At object.afterconnect [as OnComplete] (net.js:761:19)

Finally, the solution was found in StackOverflow, which was mainly due to the fact that the last Node.js server process was still running and did not shut down, so we need to kill this process, on the Mac to:

PS aux | grep node

Twer 7668 4.3 1.0 42060 10708 pts/1 sl+ 20:36 0:00 node Server

Twer 7749 0.0 0.0 4384 832 pts/8 s+ 20:37 0:00 grep--color=auto node

From the output you can see the process PID7668 in use, so we have to kill this stubborn molecule and run kill-9 7668. Ok, one key to fix, you can restart the server.