Build.gradle에서 발생하는 kotlin version 에러

 

 

 

 

발단...

Jetpack Compose Navigation을 하고 싶었습니다.

그래서 app단 build.gradle에 아래의 코드를 입력해주고 빌드해주었습니다.

 

implementation "androidx.navigation:navigation-compose:2.6.0"

 

그랬더니 아래와 같은 에러가 발생했습니다.

 

Duplicate class kotlin.collections.jdk8.CollectionsJDK8Kt found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.internal.jdk7.JDK7PlatformImplementations found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.internal.jdk7.JDK7PlatformImplementations$ReflectSdkVersion found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.internal.jdk8.JDK8PlatformImplementations found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.internal.jdk8.JDK8PlatformImplementations$ReflectSdkVersion found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.io.path.DirectoryEntriesReader found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.ExperimentalPathApi found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.FileVisitorBuilder found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.FileVisitorBuilderImpl found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.FileVisitorImpl found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.LinkFollowing found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.PathNode found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.PathRelativizer found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.PathTreeWalk found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.PathTreeWalk$bfsIterator$1 found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.PathTreeWalk$dfsIterator$1 found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.PathTreeWalkKt found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.PathWalkOption found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.PathsKt found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.PathsKt__PathReadWriteKt found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.io.path.PathsKt__PathUtilsKt found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.jdk7.AutoCloseableKt found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk7-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20)
Duplicate class kotlin.jvm.jdk8.JvmRepeatableKt found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.jvm.optionals.OptionalsKt found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.random.jdk8.PlatformThreadLocalRandom found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.streams.jdk8.StreamsKt found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.streams.jdk8.StreamsKt$asSequence$$inlined$Sequence$1 found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.streams.jdk8.StreamsKt$asSequence$$inlined$Sequence$2 found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.streams.jdk8.StreamsKt$asSequence$$inlined$Sequence$3 found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.streams.jdk8.StreamsKt$asSequence$$inlined$Sequence$4 found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.text.jdk8.RegexExtensionsJDK8Kt found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)
Duplicate class kotlin.time.jdk8.DurationConversionsJDK8Kt found in modules kotlin-stdlib-1.8.20 (org.jetbrains.kotlin:kotlin-stdlib:1.8.20) and kotlin-stdlib-jdk8-1.7.20 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.20)

 

 

위 에러는 Kotlin 표준 라이브러리와 관련된 중복 클래스에 대한 문제를 나타냅니다. Kotlin 표준 라이브러리와 Kotlin JDK8 라이브러리 간에 중복된 클래스가 발견되어 충돌이 발생한 것으로 보인다는 것입니다.

즉, 프로젝트에서 kotlin 버전과 라이브러리 버전이 서로 충돌하고 있다는 에러였습니다.

 

 

그래서 project 단의 build.gradle의 kotlin 버전을 수정해주었습니다.

id 'org.jetbrains.kotlin.android' version '1.8.20' apply false

저는 위의 버전으로 수정해주었는데,

최신 버전은 아래 링크에서 확인할 수 있습니다.

 

https://kotlinlang.org/docs/releases.html#release-details

Kotlin releases | Kotlin

 

 

그런데 저는 다음과 같은 에러가 또 발생하였습니다..

 

Execution failed for task ':data:kaptGenerateStubsDebugKotlin'.
> 'compileDebugJavaWithJavac' task (current target is 1.8) and 'kaptGenerateStubsDebugKotlin' task (current target is 17) jvm target compatibility should be set to the same Java version.

 

위의 에러는 두 가지 작업인 'compileDebugJavaWithJavac' 작업과 'kaptGenerateStubsDebugKotlin' 작업이 서로 다른 Java 버전을 대상으로 하고 있어서 발생하는 문제를 나타냅니다.

일반적으로 안드로이드 프로젝트에서는 모든 작업이 동일한 Java 버전을 대상으로 설정되어야 합니다.

그러나 해당 에러는 'compileDebugJavaWithJavac' 작업이 Java 버전 1.8을 대상으로 하고 있고, 'kaptGenerateStubsDebugKotlin' 작업은 Java 버전 17을 대상으로 하고 있다는 것을 의미합니다.

 

 

 

저는 17버전으로 설정되어 있는 걸 확인하고

app단의 build.gradle의 코틀린 컴파일 옵션을 수정해주었습니다.

 

compileOptions {
        sourceCompatibility = JavaVersion.VERSION_17
        targetCompatibility = JavaVersion.VERSION_17
}
kotlinOptions {
        jvmTarget = JavaVersion.VERSION_17.toString()
}

 

위 코드가 sourceCompatibility와 targetCompatibility인지 확인해야 합니다,,

 

 

 

그랬더니 아래와 같은 에러도 발생하였습니다.

 

This version (1.4.8) of the Compose Compiler requires Kotlin version 1.8.22 but you appear to be using Kotlin version 1.8.20 which is not known to be compatible.  Please consult the Compose-Kotlin compatibility map located at https://developer.android.com/jetpack/androidx/releases/compose-kotlin to choose a compatible version pair (or `suppressKotlinVersionCompatibilityCheck` but don't say I didn't warn you!).

 

위 에러는 컴포즈 버전과 코틀린 버전이 서로 호환하는 버전이 아닌 경우에 발생하는 에러입니다.

호환하는 버전은 아래의 링크에서 확인할 수 있습니다.

 

https://developer.android.com/jetpack/androidx/releases/compose-kotlin

Compose와 Kotlin의 호환성 지도  |  Android 개발자  |  Android Developers

 

 

그렇게 해서 빌드가 성공하였습니다 !

버전이 맞지 않을 때 정말 다양한 에러가 나올 수 있다는 걸 알 수 있었던 경험이었습니다... 🥲