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Learn how to resolve the 'Detected Multiple Kotlin Daemon Sessions' issue during a React Native build. Follow these steps to ensure a smoother Android build process in Android Studio using Gradle.
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How to Resolve 'Detected Multiple Kotlin Daemon Sessions' in React Native Build?

If you've been working on a React Native project, it's common to encounter various build issues along the way. One such issue that developers often face is the Detected Multiple Kotlin Daemon Sessions error. This error typically appears in the build logs with a message like:

[[See Video to Reveal this Text or Code Snippet]]

This problem can hinder your Android build process, leading to frustration and delays. In this guide, we'll walk you through the steps to resolve this issue effectively.

Why Does This Happen?

The Kotlin Daemon is a background process that significantly speeds up the Kotlin compilation process. However, sometimes multiple sessions of the Kotlin daemon can be initiated, leading to conflicts and build failures.

Steps to Resolve

Stop All Kotlin Daemons

The first step is to stop all running Kotlin daemon sessions. This can be done using the command line:

[[See Video to Reveal this Text or Code Snippet]]

Clean the Project

Next, clean your Android project to ensure that there are no residual files contributing to the issue:

[[See Video to Reveal this Text or Code Snippet]]

Update Gradle and Kotlin Versions

Ensure that your Kotlin and Gradle versions are up-to-date. This can help in resolving compatibility issues that might be causing multiple daemons to spawn. Update your build.gradle files accordingly:

Project-level build.gradle:

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App-level build.gradle:

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Invalidate Caches and Restart

In Android Studio, navigate to:

[[See Video to Reveal this Text or Code Snippet]]

This action can help reset the IDE and clear any cache that might be causing issues.

Check for Daemon Settings

Verify your gradle.properties file to ensure there are no conflicting settings for the Kotlin daemon:

[[See Video to Reveal this Text or Code Snippet]]

These settings optimize the build process but ensure there are no custom configurations disrupting the Kotlin daemon sessions.

Upgrade React Native

If the issue persists, consider upgrading your React Native version. Newer versions may contain fixes for this problem and other build-related issues.

Final Thoughts

By following the steps outlined above, you should be able to resolve the Detected Multiple Kotlin Daemon Sessions error in your React Native build process. Keeping your tools updated and regularly cleaning your project can prevent many such issues in the future.

If you continue to face difficulties, consider looking into specific logs or community forums for further assistance. A smooth build process is crucial for productive development, so taking the time to address these issues is well worth it.