timeout on android emulator

i was keep encountering this exception while pushing the code to android emulator:

47856057-7f798400-ddfb-11e8-9897-3c3914be463d
Annotation 2019-06-27 150813
similar to this
https://github.com/react-community/create-react-native-app/issues/144

turned out the solution was due to the firewall. after having added all android apps (android studio, emulator.exe, abd, avd etc) on the exception list of the firewall, the issue was sorted out.