Is it a known issue that with the current v1.1.3 the json artefacts are somehow broken because the kotlin serialization sub-dependencies can't be resolved:

Have you tried doing a Gradle refresh?

I had to add

jcenter()
    maven { url "<https://dl.bintray.com/kotlin/ktor>" }
    maven { url "<https://dl.bintray.com/kotlin/kotlinx>" }

which seems to have fixed it.

@holgerbrandl

kotlinx.serialization

is experimental and as such, is not in a main maven repository. It’s usual for all experimental kotlin libs like this.

Also reported here, as they are transitive deps but unused: https://github.com/ktorio/ktor/issues/965

Thanks for the details. By using experimental dependencies, it does render json-support in ktor experimental as well, doesn't it?

they are unused if you just use jackson

Still they cause trouble when using it. I've upvoted your issue, fingers crossed that they fix it soon.

Our workaround has been to exclude them from the project, we're using maven though:

<dependency>
  <groupId>io.ktor</groupId>
  <artifactId>ktor-client-jackson</artifactId>
  <version>${ktor.version}</version>
  <exclusions>
    <exclusion>
      <groupId>org.jetbrains.kotlinx</groupId>
      <artifactId>kotlinx-serialization-runtime</artifactId>
    </exclusion>
    <exclusion>
      <groupId>org.jetbrains.kotlinx</groupId>
      <artifactId>kotlinx-serialization-runtime-common</artifactId>
    </exclusion>
  </exclusions>
</dependency>

Thanks for sharing it!

np 🙂 Guessing you can do the same in gradle, I'm not familiar with it