Request deserilization is broken / throwing exception in version 0.6.0

[lopesc]

Describe the bug
The following was working in version 0.5.0. Seems like a kotlinx serlialization library version conflict

I send a POST request to the server with body:

{
        "jsonrpc": "2.0",
        "method": "tools/list",
        "id": 1
}

The server throws the following exception when it reaches Protocol.onRequest() here.

java.lang.AbstractMethodError: 'kotlinx.serialization.KSerializer[] kotlinx.serialization.internal.GeneratedSerializer.typeParametersSerializers()'
	at io.modelcontextprotocol.kotlin.sdk.ListToolsRequest$$serializer.typeParametersSerializers(types.kt:1154)
	at kotlinx.serialization.internal.PluginGeneratedSerialDescriptor$typeParameterDescriptors$2.invoke(PluginGeneratedSerialDescriptor.kt:40)
	at kotlinx.serialization.internal.PluginGeneratedSerialDescriptor$typeParameterDescriptors$2.invoke(PluginGeneratedSerialDescriptor.kt:39)
	at kotlin.SafePublicationLazyImpl.getValue(LazyJVM.kt:125)
	at kotlinx.serialization.internal.PluginGeneratedSerialDescriptor.getTypeParameterDescriptors$kotlinx_serialization_core(PluginGeneratedSerialDescriptor.kt:39)
	at kotlinx.serialization.internal.PluginGeneratedSerialDescriptor$_hashCode$2.invoke(PluginGeneratedSerialDescriptor.kt:44)
	at kotlinx.serialization.internal.PluginGeneratedSerialDescripto

Confirmation of request body being handled by the Protocol:

Point at which the exception is being thrown:

[lopesc]

Suspect kotlinx-serialization library was being downgraded to 1.6.3 by ktor.

Worked around by pinning the dependency version to 1.9.0. But without this, the server throws the serialization error:

dependencyManagement {
    dependencies {
        dependency("org.jetbrains.kotlinx:kotlinx-serialization-json:1.9.0")
        dependency("org.jetbrains.kotlinx:kotlinx-serialization-core:1.9.0")
        dependency("org.jetbrains.kotlinx:kotlinx-serialization-json-jvm:1.9.0")
        dependency("org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.9.0")
        dependency("org.jetbrains.kotlinx:kotlinx-serialization-bom:1.9.0")
    }
}

[devcrocod]

As far as I remember, kotlinx-serialization introduced breaking changes between versions 1.7.3 and 1.9.0
Would it be possible for you to upgrade ktor >= 3.1.2?

[lopesc]

I'm not even using ktor in my project. Using spring-boot-starter-webflux

[devcrocod]

I don’t quite understand your configuration.

Could you please provide more details about your server/client, what dependencies are used for the server and the client, respectively?