Coding⏱️ 3 min read📅 2026-06-04

How to Fix: A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution > java.lang.reflect.InvocationTargetException (no error message)

Kotlin Coroutines and Room database error in Android Studio

Quick Answer: Try removing the @Database annotation from your Room configuration, as it might be causing a conflict with Kapt execution.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. ✅ Best Solutions to Fix It
  3. 🎯 Final Words

The error 'java.lang.reflect.InvocationTargetException' in Android Studio indicates that there is an issue with the reflection mechanism used by the Kapt compiler. This error specifically affects developers who are using Kotlin Coroutines and Room database in their projects.

This error can be frustrating because it does not provide any clear error message, making it difficult to identify the root cause of the problem. However, by following a step-by-step approach, you can resolve this issue and get your project up and running.

⚠️ Common Causes

  • The primary reason for this error is that the @Database annotation in Room database is causing issues with the Kapt compiler. The Kapt compiler requires specific annotations to be present on entities to generate the necessary code for the database.
  • An alternative reason could be that there are conflicting dependencies or libraries in your project, which might be interfering with the Kapt compiler's ability to process the @Database annotation.

✅ Best Solutions to Fix It

Resolving the Issue by Removing the @Database Annotation

  1. Step 1: Step 1: Remove the @Database annotation from your Room database entity class. This will prevent any conflicts with the Kapt compiler and allow you to generate the necessary code for the database.
  2. Step 2: Step 2: Create a separate file for the data source class that extends the Room database class. This will help to keep your code organized and make it easier to manage the database schema.
  3. Step 3: Step 3: Update your entity classes to include the necessary @Entity annotation and other required annotations. This will allow you to generate the correct code for the database entities.

Alternative Fix Method Using a Different Approach

  1. Step 1: Step 1: Create a new file for the data source class that extends the Room database class. This will help to keep your code organized and make it easier to manage the database schema.
  2. Step 2: Step 2: Update your entity classes to include the necessary @Entity annotation and other required annotations. However, do not remove the @Database annotation from this point.

🎯 Final Words

By following these steps, you should be able to resolve the 'java.lang.reflect.InvocationTargetException' error in Android Studio and get your project up and running with Room database and Kotlin Coroutines.

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