When kapt complains, that it can't find a `tools.jar` (which is correct, because I'm not using Java ...

# kapt

[hho]

When kapt complains, that it can't find a tools.jar (which is correct, because I'm not using Java 8 anymore) – what doesn't work then? Any way to suppress that warning (I'm using Maven)?

[Aleksei Cherepanov]

Hi! Can you please share full warning message?. Also, do you build your project via JPS or via “delegate to Maven”?

[hho]

I'm using Maven on the command line. Full message:

[INFO] --- kotlin-maven-plugin:1.5.0:kapt (kapt) @ simulator ---
[WARNING] 'tools.jar' was not found, kapt may work unreliably
[INFO] Applied plugin: 'spring'
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.jetbrains.kotlin.kapt3.base.javac.KaptJavaFileManager (file:/home/hho/.m2/repository/org/jetbrains/kotlin/kotlin-annotation-processing-maven/1.5.0/kotlin-annotation-processing-maven-1.5.0.jar) to method com.sun.tools.javac.file.BaseFileManager.handleOption(com.sun.tools.javac.main.Option,java.lang.String)
WARNING: Please consider reporting this to the maintainers of org.jetbrains.kotlin.kapt3.base.javac.KaptJavaFileManager
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

[hho]

That's with AdoptOpenJDK 11, so there is indeed no tools.jar and the reflection warning is probably also expected.

[Aleksei Cherepanov]

Thank you, I’ll take a lookloading

[Aleksei Cherepanov]

@hho, hi! Thank you for your report! I’ve created issue on youtrack : https://youtrack.jetbrains.com/issue/KT-47110 You can subscribe and you will be notified about updates

[Michael Böiers]

Nice to see that this is considered for fixing. What I find more troubling is that when using AdoptOpenJDK 16, the (deprecated) switch -Dillegal-access=permit has to be set in order for kapt to work. This means that kapt will cease to work with JDK 17, 18 or whenever that option will be removed.

[Michael Böiers]

(https://youtrack.jetbrains.com/issue/KT-45545)