Async Multi with Kotlin coroutines throws NoClassDefFoundError

[johnowl]

Hello! I am struggling to execute multiple redis commands using Kotlin and coroutines in a Micronaut application. Micronaut uses Lettuce Redis version 6.1.1.RELEASE, I've added the dependencies below into my build.gradle.kts file:

    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.2")
    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactive:1.5.2")

And I've created this code to call Redis:

@Controller
@OptIn(ExperimentalLettuceCoroutinesApi::class)
class MultiControllerExample(
	private val redisConnection: StatefulRedisConnection<String, String>
) {

	@Get("/multi-coroutines")
	suspend fun multiAsync() {
		redisConnection.async().multi { // line 105
			set("foo", "bar")
			set("lorem", "ipsum")
		}
	}
}

When I call the code above, I receive this error:

15:49:34.235 [default-nioEventLoopGroup-1-2] ERROR i.m.http.server.RouteExecutor - Unexpected error occurred: kotlinx/coroutines/future/FutureKt
java.lang.NoClassDefFoundError: kotlinx/coroutines/future/FutureKt
	at com.example.MultiControllerExample.multiAsync(Application.kt:105)

Any tips?

Thanks

[mp911de]

It seems that you need to add kotlinx-coroutines-jdk8 to your project.

[johnowl]

Thank you very much @mp911de ! I added the dependency and it worked as expected.

implementation("org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:1.5.2")