I keep encountering the same errors related to Kotlin's annotation processing (KAPT) everytime i try to build the source.

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* What went wrong:
Execution failed for task ':app:kaptGenerateStubsDebugKotlin'.
> A failure occurred while executing .jetbrains.kotlinpilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction
   > Internal compiler error. See log for more details

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at .
==============================================================================

2: Task failed with an exception.
-----------
* What went wrong:
Execution failed for task ':app:kaptGenerateStubsReleaseKotlin'.
> A failure occurred while executing .jetbrains.kotlinpilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction
   > Internal compiler error. See log for more details

My build gradle (app level)

plugins {
    id 'com.android.application'
    id '.jetbrains.kotlin.android'
    id 'kotlin-kapt'
    id 'androidx.navigation.safeargs.kotlin'
}

android {
    namespace 'com.verihome.inspector'
    compileSdk 34

    defaultConfig {
        applicationId "com.verihome.inspector"
        minSdk 24
        targetSdk 34
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    buildFeatures {
        viewBinding true
        dataBinding true
    }
}

dependencies {
    // Core Android dependencies
    implementation 'androidx.core:core-ktx:1.12.0'
    implementation 'androidx.appcompat:appcompat:1.6.1'
    implementation 'com.google.android.material:material:1.11.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'

    // Architecture Components
    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.7.0'
    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.7.0'
    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.7.0'
    implementation 'androidx.fragment:fragment-ktx:1.6.2'
    implementation 'androidx.activity:activity-ktx:1.8.2'

    // Navigation Component
    def nav_version = "2.7.6"
    implementation "androidx.navigation:navigation-fragment-ktx:$nav_version"
    implementation "androidx.navigation:navigation-ui-ktx:$nav_version"

    // Retrofit for API calls
    def retrofit_version = "2.9.0"
    implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
    implementation "com.squareup.retrofit2:converter-gson:$retrofit_version"

    // OkHttp for networking
    def okhttp_version = "4.12.0"
    implementation "com.squareup.okhttp3:okhttp:$okhttp_version"
    implementation "com.squareup.okhttp3:logging-interceptor:$okhttp_version"

    // Coroutines for asynchronous code
    def coroutines_version = "1.7.3"
    implementation ".jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version"
    implementation ".jetbrains.kotlinx:kotlinx-coroutines-android:$coroutines_version"

    // Glide for image loading
    def glide_version = "4.16.0"
    implementation "com.github.bumptech.glide:glide:$glide_version"
    kapt "com.github.bumptech.glide:compiler:$glide_version"

    // Testing
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'


}

my build gradle (project level)

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.7.6"
    }
}

plugins {
    id 'com.android.application' version '8.2.1' apply false
    id 'com.android.library' version '8.2.1' apply false
    id '.jetbrains.kotlin.android' version '1.9.22' apply false
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

I am using room and kotlin. I cant see what im doing wrong here. Been banging my head on this for 2 days. Any help would be very much appreciated. Thanks.

I keep encountering the same errors related to Kotlin's annotation processing (KAPT) everytime i try to build the source.

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* What went wrong:
Execution failed for task ':app:kaptGenerateStubsDebugKotlin'.
> A failure occurred while executing .jetbrains.kotlinpilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction
   > Internal compiler error. See log for more details

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle..
==============================================================================

2: Task failed with an exception.
-----------
* What went wrong:
Execution failed for task ':app:kaptGenerateStubsReleaseKotlin'.
> A failure occurred while executing .jetbrains.kotlinpilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction
   > Internal compiler error. See log for more details

My build gradle (app level)

plugins {
    id 'com.android.application'
    id '.jetbrains.kotlin.android'
    id 'kotlin-kapt'
    id 'androidx.navigation.safeargs.kotlin'
}

android {
    namespace 'com.verihome.inspector'
    compileSdk 34

    defaultConfig {
        applicationId "com.verihome.inspector"
        minSdk 24
        targetSdk 34
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    buildFeatures {
        viewBinding true
        dataBinding true
    }
}

dependencies {
    // Core Android dependencies
    implementation 'androidx.core:core-ktx:1.12.0'
    implementation 'androidx.appcompat:appcompat:1.6.1'
    implementation 'com.google.android.material:material:1.11.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'

    // Architecture Components
    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.7.0'
    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.7.0'
    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.7.0'
    implementation 'androidx.fragment:fragment-ktx:1.6.2'
    implementation 'androidx.activity:activity-ktx:1.8.2'

    // Navigation Component
    def nav_version = "2.7.6"
    implementation "androidx.navigation:navigation-fragment-ktx:$nav_version"
    implementation "androidx.navigation:navigation-ui-ktx:$nav_version"

    // Retrofit for API calls
    def retrofit_version = "2.9.0"
    implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
    implementation "com.squareup.retrofit2:converter-gson:$retrofit_version"

    // OkHttp for networking
    def okhttp_version = "4.12.0"
    implementation "com.squareup.okhttp3:okhttp:$okhttp_version"
    implementation "com.squareup.okhttp3:logging-interceptor:$okhttp_version"

    // Coroutines for asynchronous code
    def coroutines_version = "1.7.3"
    implementation ".jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version"
    implementation ".jetbrains.kotlinx:kotlinx-coroutines-android:$coroutines_version"

    // Glide for image loading
    def glide_version = "4.16.0"
    implementation "com.github.bumptech.glide:glide:$glide_version"
    kapt "com.github.bumptech.glide:compiler:$glide_version"

    // Testing
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'


}

my build gradle (project level)

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.7.6"
    }
}

plugins {
    id 'com.android.application' version '8.2.1' apply false
    id 'com.android.library' version '8.2.1' apply false
    id '.jetbrains.kotlin.android' version '1.9.22' apply false
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

I am using room and kotlin. I cant see what im doing wrong here. Been banging my head on this for 2 days. Any help would be very much appreciated. Thanks.

• android
• kotlin
• android-room

1 Answer 1

The KAPT errors you're encountering are often due to dependency version mismatches, incompatible plugins, or misconfigured annotation processors
For example, if you’re using Kotlin 1.9.22 with Room, make sure you’re on a Room version that supports that Kotlin release.
Also, I would suggest running the following command to analyze the actual version, as sometimes a dependency can secretly update another dependency:

./gradlew dependencies > dependencies.txt