Ktor client NoSuchMethodError - kotlin

Question

I want to write a telegram bot and use this library from Github for that. In this telegram bot I need to make some requests to another service, so I want to use the ktor client library for that. However when I try to instantiate the ktor httpClient I get the following exception:
Exception in thread "main" java.lang.NoSuchMethodError: 'void io.ktor.util.collections.ConcurrentMap.<init>(io.ktor.util.Lock, int, int, kotlin.jvm.internal.DefaultConstructorMarker)'
at io.ktor.client.engine.cio.CIOEngine.<init>(CIOEngine.kt:32)
at io.ktor.client.engine.cio.CIO.create(CIOCommon.kt:23)
at io.ktor.client.HttpClientKt.HttpClient(HttpClient.kt:42)
at io.ktor.client.HttpClientJvmKt.HttpClient(HttpClientJvm.kt:21)
at io.ktor.client.HttpClientJvmKt.HttpClient$default(HttpClientJvm.kt)
at problem.ktor.MainKt.main(Main.kt:9)
at problem.ktor.MainKt.main(Main.kt)
I made a new project and narrowed the problem down to the telegram bot library, which apparently conflicts with the kotr library. I assume some version conflict of the kotr library, because that's where the exception happens. How can I solve the conflict?
Here is a minimal reproducible example. Use the following build.gradle.kts file:
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
plugins {
application
kotlin("jvm") version "1.4.30"
}
repositories {
mavenCentral()
maven(url = "https://jitpack.io")
}
dependencies {
implementation("io.ktor:ktor-client-core:1.5.2")
implementation("io.ktor:ktor-client-cio:1.5.2")
implementation("com.github.kotlin-telegram-bot:kotlin-telegram-bot:6.0.4")
}
And run the following minimal main function:
import io.ktor.client.*
fun main() {
HttpClient()
}
Maybe it's important, I use Java 15.0.2.

Answer 1

The problematic dependency is com.github.kotlin-telegram-bot.kotlin-telegram-bot:webhook:6.0.4. As a workaround you can exclude it since it's just a sample:
implementation("com.github.kotlin-telegram-bot:kotlin-telegram-bot:6.0.4") {
exclude(module = "webhook")
}