com.android.ddmlib.InstallException: Failed to establish session react-native

Question

I am trying to run react-native android app in my nexus5 emulator

adb devices
List of devices attached
emulator-5554   device

started pack

Answer 1

Sometimes it may happened due to insufficient storage within emulator.Try something like below:
   1. Stop emulator
   2. Open AVD Manager -> Wipe Data
   3. Start emulator and run your project.