React-native: Unable to perform - 'react-native start'

[bozzmob]

I am unable to start react-native server - 'react-native start'
It says there is already a process running.
Is there a way to run the same on an alternate port?

There is this MACAFEE anti'virus' running on my Mac. And in no way I am able to kill it(Even though I should not be killing it, I tried it, and looks like it never dies! Sudo has no power after all!)

Referred to #7308 and this stackoverflow

It didn't help much.

Please suggest a way to run apps on a different port.

Logs

bozzmob:Twitter bozzmobusr$ sudo lsof -n -i4TCP:8081 | grep LISTEN
macmnsvc 87518  mfe   24u  IPv6 0x935b5ff42ebea7bf      0t0  TCP *:sunproxyadmin (LISTEN)
bozzmob:Twitter bozzmobusr$ react-native start
Scanning 595 folders for symlinks in /Users/bozzmobusr/collection/work/github/reactnative/Twitter/node_modules (5ms)
 ┌────────────────────────────────────────────────────────────────────────────┐ 
 │  Running packager on port 8081.                                            │ 
 │                                                                            │ 
 │  Keep this packager running while developing on any JS projects. Feel      │ 
 │  free to close this tab and run your own packager instance if you          │ 
 │  prefer.                                                                   │ 
 │                                                                            │ 
 │  https://github.com/facebook/react-native                                  │ 
 │                                                                            │ 
 └────────────────────────────────────────────────────────────────────────────┘ 
Looking for JS files in
   /Users/bozzmobusr/collection/work/github/reactnative/Twitter 

[4:33:12 PM] <START> Building Dependency Graph
[4:33:12 PM] <START> Crawling File System
 ERROR  Packager can't listen on port 8081
Most likely another process is already using this port
Run the following command to find out which process:

   lsof -n -i4TCP:8081 

You can either shut down the other process:

   kill -9 <PID> 

or run packager on different port.

See http://facebook.github.io/react-native/docs/troubleshooting.html
for common problems and solutions.
bozzmob:Twitter bozzmobusr$ sudo kill -9 87518
bozzmob:Twitter bozzmobusr$ sudo lsof -n -i4TCP:8081 | grep LISTEN
macmnsvc 88265  mfe   24u  IPv6 0x935b5ff457ed6d3f      0t0  TCP *:sunproxyadmin (LISTEN)
bozzmob:Twitter bozzmobusr$ 

Additional Information

• React Native version: 0.32.1
• Platform: both
• Operating System: MACOS

[bozzmob]

Dug a lot deeper and found out the answer.
--port= solved the issue.

react-native start --port=8088

[bozzmob]

But, I still see RED Screen of Death :( Need help.

What is happening - react-native start --port=8088 works fine. Haste Map and Dependency Graph is getting generated. App gets installed fine when I do react-native run-android.
But, the red screen still shows up which says-

Could not connect to development server

[Ehesp]

Have you set the host/port up to point to the new non-default location in the app dev menu?

[brentvatne]

Hey there! It's probably best to post this to https://www.facebook.com/groups/react.native.community/ or StackOverflow :) If it turns out that this is actually a bug with React Native, feel free to repost here.

[bozzmob]

Raised a discussion here - https://www.facebook.com/groups/react.native.community/permalink/876065075862405

And here - http://stackoverflow.com/questions/40817009/could-not-install-the-app-on-the-device-on-react-native-run-android

[juliantellez]

@bozzmob I just ran into the same problem, thanks McAfee 👎
this is how I stopped the macmn process

sudo lsof -n -i4TCP:8081 # get the process' PID
sudo launchctl list | grep 5693 # find the launchd endpoint
sudo launchctl remove com.mcafee.agent.macmn