React-native: Connection refused when running android project

Created on 30 May 2018 · 8Comments · Source: facebook/react-native

Environment

OS: Windows 7
Node: 8.11.1
Yarn: Not Found
npm: 5.6.0
Watchman: Not Found
Xcode: N/A
Android Studio: Not Found

Packages: (wanted => installed)
react: 16.3.1 => 16.3.1
react-native: 0.55.4 => 0.55.4

Description

Connection refused while running react-native run-android

Steps to Reproduce

react-native run-android

Expected Behavior

Build success

Actual Behavior

to: java.net.ConnectException: Connection refused: connect to: java.net.ConnectException: Connection refused: connect

Android Locked

Source

vbraeke

Most helpful comment

It's due to fact that Win7 prefers to return IPV6 address for localhost and mine was not properly setup. So I forced java to use IPV4 adress by adding a new environment variable :
_JAVA_OPTIONS=-Djava.net.preferIPv4Stack=true
And it fixed it.

in what file?

cd your project file and paste it to terminal
for mac: export _JAVA_OPTIONS=-Djava.net.preferIPv4Stack=true

minhphung210 on 25 Dec 2018

👍7 ❤1

All 8 comments

It looks like your issue may be missing some necessary information. Can you run react-native info and edit your issue to include these results under the Environment section?

react-native-bot on 30 May 2018

Any solution for this issue?

Piusha on 12 Jun 2018

Any solution on this? im having the same problem, I suspect it was something to do with realm? since the port is 5037 and im seeing this piece of message when react-native run-android.

Task :realm:forwardDebugPort

daemon not running; starting now at tcp:5037

daemon started successfully

warrence on 12 Jun 2018

It's due to fact that Win7 prefers to return IPV6 address for localhost and mine was not properly setup. So I forced java to use IPV4 adress by adding a new environment variable :

_JAVA_OPTIONS=-Djava.net.preferIPv4Stack=true

And it fixed it.

vbraeke on 12 Jun 2018

👍2 ❤1

i have same issue.
i use macOS High Sierra 10.13.6 and react-native version: 0.57.7

minhphung210 on 28 Nov 2018

It's due to fact that Win7 prefers to return IPV6 address for localhost and mine was not properly setup. So I forced java to use IPV4 adress by adding a new environment variable :

_JAVA_OPTIONS=-Djava.net.preferIPv4Stack=true

And it fixed it.

in what file?

avoidchanges on 17 Dec 2018

It's due to fact that Win7 prefers to return IPV6 address for localhost and mine was not properly setup. So I forced java to use IPV4 adress by adding a new environment variable :
_JAVA_OPTIONS=-Djava.net.preferIPv4Stack=true
And it fixed it.

in what file?

cd your project file and paste it to terminal
for mac: export _JAVA_OPTIONS=-Djava.net.preferIPv4Stack=true

minhphung210 on 25 Dec 2018

👍7 ❤1

Thank you @minhphung210