Dokka: kotlin.KotlinNothingValueException on dokkaHtml

[vladimirshefer]

Describe the bug
I have a multimodule project

<project root>
|- core
| |- build.gradle
| |- src/main/kotlin...
|- server
| |- src/main/kotlin...
| |- build.gradle
|- build.gradle

When I run

gradlew :server:dokkaHtml --full-stacktrace

I get java.lang.ClassNotFoundException: kotlin.KotlinNothingValueException (Full stacktrace: https://pastebin.com/raw/nD7wapGd)

Expected behaviour
Build successful. Site is in /build/dokka directory

Dokka configuration
Configuration of dokka used to reproduce the bug

server/build.gradle

plugins {
    id 'org.jetbrains.dokka'
}

tasks.dokkaHtml {
    outputDirectory = "$buildDir/dokka"
}

settings.gradle

pluginManagement {
    repositories {
        gradlePluginPortal()
        jcenter()
    }
}

Installation

• Operating system: Linux Ununtu 18.04. Linux 4.15.0-106-generic amd64
• Build tool: Gradle v6.3
• Java: 1.8.0_242 (Oracle Corporation 25.242-b08)
• Kotlin: 1.3.70
• Groovy: 2.5.10
• Dokka version: 1.4.0-rc

Additional context

[Kordyjan]

Could you please paste outputs of ./gradlew :server:dependencies --configuration dokkaHtmlPlugin and ./gradlew :server:dependencies --configuration dokkaHtmlRuntime?

[Kordyjan]

And yet another thing! Is this possible for you to check if the problem persists after updating the kotlin plugin to 1.4.0-rc?

[vladimirshefer]

And yet another thing! Is this possible for you to check if the problem persists after updating the kotlin plugin to 1.4.0-rc?

Yes, bump version to 1.4.0-rc fixed that problem.

Is it going to be solved using Kotlin 1.3.x?

[vladimirshefer]

Seems like it is no more required, but still
If I rollback Kotlin version and execute these commands thats it:

Could you please paste outputs of ./gradlew :server:dependencies --configuration dokkaHtmlPlugin
dokkaHtmlPlugin

\--- org.jetbrains.dokka:dokka-base:1.4.0-rc
     +--- org.jetbrains.dokka:dokka-analysis:1.4.0-rc
     |    +--- org.jetbrains.dokka:kotlin-analysis-intellij:1.4.0-rc
     |    +--- org.jetbrains.dokka:kotlin-analysis-compiler:1.4.0-rc
     |    \--- org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4.0-rc -> 1.3.60
     |         +--- org.jetbrains.kotlin:kotlin-stdlib:1.3.60
     |         |    +--- org.jetbrains.kotlin:kotlin-stdlib-common:1.3.60
     |         |    \--- org.jetbrains:annotations:13.0
     |         \--- org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.60
     |              \--- org.jetbrains.kotlin:kotlin-stdlib:1.3.60 (*)
     +--- org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4.0-rc -> 1.3.60 (*)
     +--- org.jetbrains.kotlin:kotlin-stdlib:1.4.0-rc -> 1.3.60 (*)
     +--- org.jetbrains.kotlin:kotlin-reflect:1.4.0-rc -> 1.3.60
     |    \--- org.jetbrains.kotlin:kotlin-stdlib:1.3.60 (*)
     +--- org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.3.8-1.4.0-rc
     |    +--- org.jetbrains.kotlin:kotlin-stdlib:1.4.0-rc -> 1.3.60 (*)
     |    \--- org.jetbrains.kotlin:kotlin-stdlib-common:1.4.0-rc -> 1.3.60
     +--- org.jsoup:jsoup:1.12.1
     \--- org.jetbrains.kotlinx:kotlinx-html-jvm:0.7.1-1.4-M3
          +--- org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4-M3 -> 1.3.60 (*)
          \--- org.jetbrains.kotlin:kotlin-stdlib-common:1.4-M3 -> 1.3.60

and ./gradlew :server:dependencies --configuration dokkaHtmlRuntime?

dokkaHtmlRuntime
\--- org.jetbrains.dokka:dokka-core:1.4.0-rc
     +--- org.jetbrains:markdown:0.1.45
     |    \--- org.jetbrains.kotlin:kotlin-stdlib:1.3.41 -> 1.3.60
     |         +--- org.jetbrains.kotlin:kotlin-stdlib-common:1.3.60
     |         \--- org.jetbrains:annotations:13.0
     +--- org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4.0-rc -> 1.3.60
     |    +--- org.jetbrains.kotlin:kotlin-stdlib:1.3.60 (*)
     |    \--- org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.60
     |         \--- org.jetbrains.kotlin:kotlin-stdlib:1.3.60 (*)
     +--- org.jetbrains.kotlin:kotlin-reflect:1.4.0-rc -> 1.3.60
     |    \--- org.jetbrains.kotlin:kotlin-stdlib:1.3.60 (*)
     +--- org.jsoup:jsoup:1.12.1
     \--- com.fasterxml.jackson.module:jackson-module-kotlin:2.11.1 -> 2.10.2
          +--- com.fasterxml.jackson.core:jackson-databind:2.10.2
          |    +--- com.fasterxml.jackson.core:jackson-annotations:2.10.2
          |    \--- com.fasterxml.jackson.core:jackson-core:2.10.2
          +--- com.fasterxml.jackson.core:jackson-annotations:2.10.2
          \--- org.jetbrains.kotlin:kotlin-reflect:1.3.61 -> 1.3.60 (*)

[sellmair]

@vladimirshefer Unfortunately, this kind of issues seem to arise because of the overall fact that Kotlin 1.4 is not compatible with Kotlin 1.3.*
We cannot allocate a lot of work into trying to work around those limitations, but we will at least have a look at this and see how much effort it would be. We, in theory, should support simple projects even with Kotlin 1.3.x (see our integration tests)

[kpramesh2212]

Hi All

I had the same issue. Instead of putting pressure on the team for backward compatibility may i suggest the following solution.

configurations.all {
    resolutionStrategy.eachDependency {
        if (name.contains("dokka")) {
            if (requested.group == "org.jetbrains.kotlin" && requested.version != "1.4.10") {
                useVersion("1.4.10")
                because("Dokka plugin requires kotlin version 1.4.10")
            }
        } else {
            if (requested.group == "org.jetbrains.kotlin" && requested.version != "1.3.72") {
                useVersion("1.3.72")
                because("Gradle 6.7 uses version 1.3.72")
            }
        }
    }
}

Please let me know if this fixes your issues

Gradle is very flexible and I loves its dependency management a lot

[vladimirshefer]

@kpramesh2212 thank you for your answer.
I'll try this solution.
Did you use this in production?

[kpramesh2212]

@vladimirshefer

Yes I am using it in one of my open-source plugin

https://github.com/kpramesh2212/openapi-merger-plugin/blob/main/openapi-merger-gradle-plugin/build.gradle.kts