ionic 2 update from rc2.0 to rc3 serve error

[ykonstant]

ionic-hello-world@ ionic:serve /Applications/XAMPP/xamppfiles/htdocs/huntfishshare

ionic-app-scripts serve

[19:10:13] ionic-app-scripts 0.0.45
[19:10:13] watch started ...
[19:10:13] build dev started ...
[19:10:13] clean started ...
[19:10:13] clean finished in less than 1 ms
[19:10:13] copy started ...
[19:10:13] transpile started ...
events.js:160
throw er; // Unhandled 'error' event
^

Error: listen EADDRINUSE 0.0.0.0:53703
at Object.exports._errnoException (util.js:1022:11)
at exports._exceptionWithHostPort (util.js:1045:20)
at Server._listen2 (net.js:1262:14)
at listen (net.js:1298:10)
at doListening (net.js:1397:7)
at _combinedTickCallback (internal/process/next_tick.js:77:11)
at process._tickCallback (internal/process/next_tick.js:98:9)
at Module.runMain (module.js:607:11)
at run (bootstrap_node.js:420:7)
at startup (bootstrap_node.js:139:9)

npm ERR! Darwin 15.6.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "ionic:serve" "--"
npm ERR! node v7.2.0
npm ERR! npm v3.10.9
npm ERR! code ELIFECYCLE
npm ERR! ionic-hello-world@ ionic:serve: ionic-app-scripts serve
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the ionic-hello-world@ ionic:serve script 'ionic-app-scripts serve'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the ionic-hello-world package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! ionic-app-scripts serve
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs ionic-hello-world
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls ionic-hello-world
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /Applications/XAMPP/xamppfiles/htdocs/huntfishshare/npm-debug.log
There was an error serving your Ionic application: There was an error with the spawned command: serve

[manucorporat]

EADDRINUSE, stands for "address already in use", you probably have another ionic serve running in the background using the same TCP port. Close it and try again

[ykonstant]

thanks,
port is already in used
i used
sudo lsof -i : for listing
sudo kill -9 for free port
It resolves my problem
thanks, again