Does the normal version of Ktor support the new Kotlin Native Memory Management Model from 1.6.3+? I...

# ktor

[ribesg]

Does the normal version of Ktor support the new Kotlin Native Memory Management Model from 1.6.3+? I don’t see anything in the changelog

[Big Chungus]

What do you mean by normal?

[ribesg]

As opposed to the eap 1.6.2 version which was specifically made for the new memory model, after that I can’t find anything about it in subsequent versions

[Big Chungus]

Are you talking about ktor client?

[ribesg]

Well yeah in my case

[ribesg]

But you can also use the server in K/N so it shouldn’t matter

[Big Chungus]

I think you should be fine with new mm. Ktor server in k/n is not released yet and will only come with 2.0

[ribesg]

Thanks, I’ll try the new mm then

[Michal Klimczak]

I am trying to make the 2.0 client work with new memory model and having some troubles.

Right now it's InvalidMutabilityException: mutation attempt of frozen kotlin.Array@249bab0 in kfun:io.ktor.client.plugins.json.serializer.SerializerInitializer.<init>#internal + 236. (trying to install kotlinx serialization into ktor) Using coroutines 1.6.0-native-mt fwiw (in regular 1.6.0 had other issues).

(works without new-mm flag)

[ribesg]

I’m pretty sure coroutines 1.6.0-native-mt isn’t meant to work with the new memory model

[hfhbd]

Coroutines 1.6.0-native-mt works with the new MM. Problems are external dependencies, like io.ktor.client.plugins.json, which uses a shared Json instance

[Michal Klimczak]

I put my own Json instance to the plugin. This happens at the very startup of the app, the first time the ktor client is created with the json plugin. Any hints what can be done about it?

[hfhbd]

I think, this is useless https://github.com/ktorio/ktor/blob/b4eba576138372accc299ac8ae2081bb52e6706e/ktor-shared/ktor-serialization/ktor-serialization-kotlinx/ktor-serialization-kotlinx-json/common/src/io/ktor/serialization/kotlinx/json/JsonSupport.kt#L25

[Michal Klimczak]

🤔 I'm not using the defaults so that should not affect my code.

[Michal Klimczak]

okay so I fixed it by removing

implementation("io.ktor:ktor-client-serialization:$ktorVersion")

from my iosMain source set (was left after migration to ktor 2.x).

But now I have kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen io.ktor.client.engine.engines.Node@3d40580 😄

[Michal Klimczak]

okay, so the thing that fixes ktor and a few other things for me is kotlin.native.binary.freezing=disabled in gradle.properties

[Aleksei Tirman [JB]]

What exact version of Ktor do you use?

[Michal Klimczak]

2.0.0-beta-1