Kotlin
Cannot compile the project in multi-module Maven setup
Describe the bug
I have a multi-module Maven project, in which one of the shared modules is called commons and is used by other modules (let's called them A and B).
All modules (A, B and commons) contain classes that are @Serializable.
All modules do have kotlinx-serialization-json-jvm dependency.
The kotlin-maven-plugin is configured for all modules as follows:
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<version>${kotlin.version}</version>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
</executions>
<configuration>
<jvmTarget>21</jvmTarget>
<compilerPlugins>
<plugin>kotlinx-serialization</plugin>
</compilerPlugins>
</configuration>
<dependencies>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-serialization</artifactId>
<version>${kotlin.version}</version>
</dependency>
</dependencies>
</plugin>
When compiling the project, I'm getting an error on the first module that is using commons as dependency (e.g. A):
Your current kotlinx.serialization core version is 2.0.20, while current Kotlin compiler plugin unknown requires at least 1.0-M1-SNAPSHOT. Please update your kotlinx.serialization runtime dependency.
When I removed all @Serializable classes from commons and got rid of the plugin there, project was compiling again.
As a temporary workaround, I can suppress errors on all @Serializable classes which makes the compilation working:
@Suppress("PROVIDED_RUNTIME_TOO_LOW", "INLINE_CLASSES_NOT_SUPPORTED")
To Reproduce
In commons module:
@JvmInline
@Serializable
value class UserId(
val id: String,
)
In A module:
import commons.UserId
@Serializable
data class Event(
val userId: UserId,
)
Expected behavior Multi-module Maven project can be compiled without any errors.
Environment
- Kotlin version: 2.0.20
- Library version: 1.7.2
- Kotlin platforms: JVM
- Maven version: 3.9.7
- IDE version: IntelliJ IDEA 2024.2.1
- Other relevant context: MacOS 14.5, JRE 21.0.4 Temurin
Having the same issue, here is by environment:
- Kotlin version: 2.0.20
- Gradle version: 8.10.2
- Kotlin Platforms: JVM
- Java Version: 21.0.4 Oracle
- IDE Version: IntelliJ IDEA 2024.2.3 (Ultimate Edition)
Details:
- The
@Suppress("PROVIDED_RUNTIME_TOO_LOW", "INLINE_CLASSES_NOT_SUPPORTED")workaround works for me - Fails the same way building within IntelliJ and with gradlew command line build:
$ ./gradlew build
> Task :compileKotlin FAILED
e: file:///Path/to/Example.kt:5:1 Your current kotlinx.serialization core version is 2.0.20, while current Kotlin compiler plugin unknown requires at least 1.0-M1-SNAPSHOT. Please update your kotlinx.serialization runtime dependency.
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':compileKotlin'.
> A failure occurred while executing org.jetbrains.kotlin.compilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction
> Compilation error. See log for more details
* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
BUILD FAILED in 814ms
1 actionable task: 1 executed
@jyennaco , do you have a small reproducer project? This error is difficult to reproduce locally without full build configuration.
