JS server not recognized, continuing with build

Question

Environment

Windows 10

Npm 5.5.1

react-native-cli 2.0.1

react-native 0.50.3

Genymotion Google Nexus 7 - 6.0.0 API 23

Answer 1

I had this issue when I had another process running on port 8081.

1. Find the process lsof -i tcp:8081
2. Get the PID, in my case 25120
3. Kill the process: kill -9 25120
4. Start React Native Again