React-native: Execution failed for task ':app:compileDebugJavaWithJavac'.

[wzup]

Environment

Environment:

• OS: Linux 4.13
• Node: 8.9.4
• Yarn: Not Found
• npm: 5.6.0
• Watchman: Not Found
• Xcode: N/A
• Android Studio: Not Found

Packages: (wanted => installed)

• react: 16.3.0-alpha.2 => 16.3.0-alpha.2
• react-native: 0.54.2 => 0.54.2

Description

When I try $ react-native run-android on android emulator, I get this error:

:app:compileDebugJavaWithJavac
/home/user/app/android/app/src/main/java/com/package/MainApplication.java:8: error: a type with the same simple name is already defined by the single-type-import of RNAWSCognitoPackage
import com.airlabsinc.RNAWSCognitoPackage;
^
1 error
Incremental compilation of 1 classes completed in 0.448 secs.
:app:compileDebugJavaWithJavac FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 10.964 secs
Could not install the app on the device, read the error above for details.
Make sure you have an Android emulator running or a device connected and have
set up your Android development environment:
https://facebook.github.io/react-native/docs/getting-started.html

Then I have 2 imports with the same name in my /home/user/app/android/app/src/main/java/com/package/MainApplication.java
May this cause the issue?
Is this the issue with RN?

package com.package;

import android.app.Application;

import com.facebook.react.ReactApplication;
import com.amazonaws.RNAWSCognitoPackage; // 1
import com.amazonaws.amplify.pushnotification.RNPushNotificationPackage;
import com.airlabsinc.RNAWSCognitoPackage; // 2
import com.horcrux.svg.SvgPackage;
import com.toast.ToastPackage;
import com.vdi.VDIPackage;
import com.BV.LinearGradient.LinearGradientPackage;
import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainReactPackage;
import com.facebook.soloader.SoLoader;

import java.util.Arrays;
import java.util.List;

Steps to Reproduce

// TO DO

Expected Behavior

Running app on android emulator

Actual Behavior

See error above

[react-native-bot]

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]

Please use Stack Overflow for this type of question.

[wzup]

As you asked https://stackoverflow.com/questions/50815811/execution-failed-for-task-appcompiledebugjavawithjavac

Now answer. Here or there

[alitsvin]

The issue may also occur if you linked some external plugin and then removed it without unlink. In that case you can attentively read your console error message. It should point to place that source an error.