Another issue: I’m working on a multiplatform libr...

# serialization

[KamilH]

Another issue:
I’m working on a multiplatform library and I’m using both ktor 1.4.1 and serialization 1.0.0. When I’m building and publishing it is works fine, but when I’m trying to use it in another project I’m getting a lot of “duplication” errors:

Duplicate class kotlinx.serialization.BinaryFormat found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)

I found some message that suggest to exclude it in a following way:

implementation(io.ktor:ktor-client-serialization:1.4.1) {
    exclude(group = "org.jetbrains.kotlinx", module = "kotlinx-serialization-runtime")
}

but it doesn’t help

[KamilH]

Duplicate class kotlinx.serialization.BinaryFormat found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.DeserializationStrategy found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.InternalSerializationApi found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.KSerializer found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.MissingFieldException found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.Polymorphic found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.PolymorphicSerializer found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.PolymorphicSerializer$descriptor$1 found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.Required found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.SealedClassSerializer found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.SealedClassSerializer$$special$$inlined$groupingBy$1 found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.SealedClassSerializer$descriptor$1 found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.SealedClassSerializer$descriptor$1$elementDescriptor$1 found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.SerialFormat found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.SerialFormatKt found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.SerialInfo found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.SerialName found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.Serializable found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.SerializationException found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.SerializationStrategy found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)
Duplicate class kotlinx.serialization.Serializer found in modules jetified-kotlinx-serialization-core-jvm-1.0.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.0.0) and jetified-kotlinx-serialization-runtime-0.20.0.jar (org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0)

[KamilH]

and so on

[sandwwraith]

It looks like you have dependency that transitively includes old serialziation runtime

[KamilH]

Is there any possibility to get to know which one includes old serialization runtime?

[araqnid]

Did you solve this? You can use gradle dependencies to show the dependency graph, or you can do the exclusion at the configuration level rather than on a specific dependency

[KamilH]

Hi Steve, thank you for your comment. Actually I fixed it. It turned out that some library in the project to which I wanted to import my library to has been using serializations 0.2.0. When I updated that dependency, problem disappeared