react-native: Android emulator loses connection to debugger and becomes unresponsive
To reproduce:
- Fire up a Genymotion emulator
react-native run-androidon your project- Attach chrome debugger
- Put an error in javascript, for example
returnsinstead ofreturn - Refresh your emulator (Cmd M, Reload)
- Fix the error in your code
- Refresh your emulator (Cmd M, Reload) again
- Emulator will display dialog that says “Please wait… connecting to remote debugger”
- There is no way to exit this state, except to close and reboot the emulator
Errors caught in the debugger in this situation are:
GET http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false 500 (Internal Server Error) debuggerWorker.js:18 Uncaught NetworkError: Failed to execute 'importScripts' on 'WorkerGlobalScope': The script at 'http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false' failed to load.messageHandlers.executeApplicationScript @ debuggerWorker.js:18onmessage @ debuggerWorker.js:33
I use Genymotion, usually test on APIs 16 & 21 which have both experienced this issue.
I am running React Native version 0.20.
I am running on a Mac.
About this issue
- Original URL
- State: closed
- Created 8 years ago
- Reactions: 19
- Comments: 18 (4 by maintainers)
I thought this was fixed but it’s still a problem. The issue went away a while ago for me, but now it’s back. Maybe it has something to do with promises? I started using AsyncStorage last week. No errors come up, although I do sometimes get the
unhandled promise rejectionwarning for no apparent reason.same issue genymotion and real device windows 10 and osx 10.11.6 react-native 0.33
the fastest way to recover I found out is to
ctrl+cthen[up], [enter]the packager. This way the app crashes instantly and I can reload. Any other way makes android hang for ages.