Building Kotlin projects with Gradle sometimes fails with NoClassDefFoundError

问题

I can't reliably reproduce this problem because it is sporadic. This is what I get when I build a Kotlin project with Gradle:

Could not perform incremental compilation: Could not connect to Kotlin compile daemon
Could not connect to kotlin daemon. Using fallback strategy.
:myproj:compileKotlin FAILED
1 actionable task: 1 executed
e: java.lang.NoClassDefFoundError: Could not initialize class kotlin.Unit
warning: the '-d' option with a directory destination is ignored because '-Xbuild-file' is specified
Exception in thread "Thread-25" java.lang.NoClassDefFoundError: Could not initialize class kotlin.Unit
    at org.jetbrains.kotlin.compilerRunner.UtilsKt$runToolInSeparateProcess$readErrThread$1$1.invoke(utils.kt)
    at kotlin.io.TextStreamsKt.forEachLine(ReadWrite.kt:154)
    at org.jetbrains.kotlin.compilerRunner.UtilsKt$runToolInSeparateProcess$readErrThread$1.invoke(utils.kt:68)
    at org.jetbrains.kotlin.compilerRunner.UtilsKt$runToolInSeparateProcess$readErrThread$1.invoke(utils.kt)
    at kotlin.concurrent.ThreadsKt$thread$thread$1.run(Thread.kt:18)
e: java.lang.NoClassDefFoundError: Could not initialize class kotlin.Unit
...

I run Gradle with the following options

gradle assemble --no-daemon --parallel
I tried this within Docker and on my local machine as well (this even happens on the CI server as well)
this error is completely sporadic I was not able to pinpoint a cause
it happens with single and multi-module projects as well
removing the --parallel or adding --daemon option does not help
I'm using Gradle 4.2

What could be the problem?

回答1:

This is a known issue with Kotlin. Unfortunately at this time we don't know what exactly causes it.

回答2:

The cause of this problem is related to use of two or more different Kotlin version. In my case, I use Android Studio 3 and IntelliJ IdeaU 2017. The solution that I used and it worked is:

check your Kotlin version in either IDE. In this case, you should update the Kotlin's compiler to the same version.
If you use just one IDE, the best possible solution is to remove your IDE and all caches.

For more information, please refer to Kotlin community.

来源：https://stackoverflow.com/questions/46648318/building-kotlin-projects-with-gradle-sometimes-fails-with-noclassdeffounderror

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java

gradle

kotlin