React Native internal error

Question

I have been trying to make a simple test app using react native but I am getting this

Sometimes the app runs without any error but again after sometime this error pops up so cam someone please help me. Thank You!!

This is my console output:

image

And this is what I am getting in android studio logcat:

12-04 18:19:42.856 4147-4163/com.album E/unknown:ReactNative: Unable to download JS bundle
                                                          com.facebook.react.common.DebugServerException: The development server returned response error code: 500

                                                          URL: http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false

                                                          Body:
                                                          {"type":"InternalError","errors":[],"message":"Metro Bundler has encountered an internal error, please check your terminal error output for more details"}
                                                              at com.facebook.react.devsupport.BundleDownloader.processBundleResult(BundleDownloader.java:225)
                                                              at com.facebook.react.devsupport.BundleDownloader.access$100(BundleDownloader.java:40)
                                                              at com.facebook.react.devsupport.BundleDownloader$1.onResponse(BundleDownloader.java:192)
                                                              at okhttp3.RealCall$AsyncCall.execute(RealCall.java:135)
                                                              at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
                                                              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                                                              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                                                              at java.lang.Thread.run(Thread.java:818)
12-04 18:19:42.899 4147-4164/com.album E/Surface: getSlotFromBufferLocked: unknown buffer: 0xb407eec0
12-04 18:19:42.902 4147-4147/com.album E/unknown:ReactNative: Exception in native call
                                                          com.facebook.react.common.DebugServerException: The development server returned response error code: 500

                                                          URL: http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false

                                                          Body:
                                                          {"type":"InternalError","errors":[],"message":"Metro Bundler has encountered an internal error, please check your terminal error output for more details"}
                                                              at com.facebook.react.devsupport.BundleDownloader.processBundleResult(BundleDownloader.java:225)
                                                              at com.facebook.react.devsupport.BundleDownloader.access$100(BundleDownloader.java:40)
                                                              at com.facebook.react.devsupport.BundleDownloader$1.onResponse(BundleDownloader.java:192)
                                                              at okhttp3.RealCall$AsyncCall.execute(RealCall.java:135)
                                                              at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
                                                              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                                                              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                                                              at java.lang.Thread.run(Thread.java:818)

We will need to see what the console output is and also what the output on your command line is. — ShaneG
– ShaneG, Commented Dec 4, 2017 at 14:35
The error says it’s unable to download js bundle. Thus ensure your application has internet permission or you have internet access — silverFoxA
– silverFoxA, Commented Dec 7, 2017 at 6:04

Satyam Rai · Accepted Answer · 2017-12-10 08:40:34Z

6

I restarted my laptop and it worked for me.

I am not saying this is the correct solution but it worked for me.

answered Dec 10, 2017 at 8:40

Satyam Rai

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Comments

Pedro Soares · Accepted Answer · 2018-11-11 18:20:18Z

2

Sometimes this error can occur because the application cache needs to be cleaned.

You could try to get into the Android folder in the react-native project directory and run this command:gradlew clean then go back to react-native root folder and try to run android emulator react-native run-android. Also you could try react-native start --reset-cache.

answered Nov 11, 2018 at 18:20

Pedro Soares

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Rajesh Bhartia · Accepted Answer · 2018-05-17 08:07:04Z

1

Just try this line of code in your terminal

sudo lsof -i :8081
kill -9

answered May 17, 2018 at 8:07

Rajesh Bhartia

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Dino Sunny · Accepted Answer · 2019-10-14 06:40:01Z

1

Try this

1.sudo lsof -i :<Your port>
2.Run sudo kill -9 <PID>
3.Run application again

answered Oct 14, 2019 at 6:40

Dino Sunny

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Thando Zondo · Accepted Answer · 2020-06-07 06:23:46Z

1

this worked for me run this command at your project's directory folder

expo r -c

answered Jun 7, 2020 at 6:23

Thando Zondo

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GentryRiggen · Accepted Answer · 2018-01-29 04:22:51Z

0

Fam, I fixed my issue and like most of them, it's completely my fault. I was refactoring and deleted some files without cleaning up some imports of the deleted files. The only way I found this was to add a console.log in metro (node_modules/metro/src/lib/formatBundlingError.js).

function formatBundlingError(error) { console.log(error); }

answered Jan 29, 2018 at 4:22

GentryRiggen

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unpokkolokko · Accepted Answer · 2018-05-16 03:31:07Z

0

i refer here and manage to fix this problem

downgrade babel-preset-react-native to version 1.9.2
run yarn

answered May 16, 2018 at 3:31

unpokkolokko

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4b0 · Accepted Answer · 2018-05-16 03:35:36Z

0

Be sure you're using http://localhost:8081/debugger-ui/ and not 10.0.2.x.

edited May 16, 2018 at 3:35

4b0

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answered May 16, 2018 at 3:34

LewisW

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Firdous nath · Accepted Answer · 2019-02-08 12:18:17Z

0

I got the same error I solved this error by running sudo npm i command inside the project.

edited Feb 8, 2019 at 12:18

Firdous nath

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answered Feb 8, 2019 at 7:25

Anil kumar

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Rushita · Accepted Answer · 2019-05-07 16:21:51Z

0

You could try to get into the Android folder in the react-native project directory and run this command:gradlew clean then go back to react-native root folder and try to run android emulator react-native run-android. Also you could try react-native start --reset-cache

answered May 7, 2019 at 16:21

Rushita

1

Comments

mehrdadep · Accepted Answer · 2019-06-24 16:24:17Z

0

It's working

Sometimes this error can occur because the application cache needs to be cleaned.

You could try to get into the Android folder in the react-native project directory and run this command: gradlew clean then go back to react-native root folder and try to run android emulator react-native run-android. Also you could try this: react-native start --reset-cache

edited Jun 24, 2019 at 16:24

mehrdadep

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answered Jun 24, 2019 at 15:39

Sonu Choudhary

1

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BlackICE · Accepted Answer · 2019-03-12 16:13:29Z

-1

React Native 0.59 by default supports version 3 of gradle. If you have upgraded to version 4 or higher you will get this error:

classpath 'com.android.tools.build:gradle:3.3.1'

When you open the project in Android Studio, if it shows a dialog of Auto Update gradle, you need to skip the update.

edited Mar 12, 2019 at 16:13

BlackICE

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answered Mar 12, 2019 at 14:04

Ko Nyan

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