Gradle 7.0 has problems with annotation processors and java 16

[graemerocher]

When building a Micronaut application with Gradle 7.0 it fails with java.lang.IllegalAccessError

Expected Behavior

Should compile

Current Behavior

Fails with

Execution failed for task ':compileJava'.
> java.lang.IllegalAccessError: class org.gradle.internal.compiler.java.ClassNameCollector (in unnamed module @0x77b92754) cannot access class com.sun.tools.javac.code.Symbol$TypeSymbol (in module jdk.compiler) because module jdk.compiler does not export com.sun.tools.javac.code to unnamed module @0x77b92754

Steps to Reproduce

Try compile https://github.com/graemerocher/micronaut-hol-example with Gradle 7 rc1 and java 16

Your Environment

• Gradle 7.0 rc1
• openjdk version "16" 2021-03-16
• Micronaut 2.4.1

[graemerocher]

full stack trace

Caused by: java.lang.IllegalAccessError: class org.gradle.internal.compiler.java.ClassNameCollector (in unnamed module @0x77b92754) cannot access class com.sun.tools.javac.code.Symbol$TypeSymbol (in module jdk.compiler) because module jdk.compiler does not export com.sun.tools.javac.code to unnamed module @0x77b92754
        at org.gradle.internal.compiler.java.ClassNameCollector.processSourceFile(ClassNameCollector.java:74)
        at org.gradle.internal.compiler.java.ClassNameCollector.finished(ClassNameCollector.java:57)
        at jdk.compiler/com.sun.tools.javac.api.ClientCodeWrapper$WrappedTaskListener.finished(ClientCodeWrapper.java:864)
        at jdk.compiler/com.sun.tools.javac.api.MultiTaskListener.finished(MultiTaskListener.java:132)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1658)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1612)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:973)
        at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.lambda$doCall$0(JavacTaskImpl.java:104)
        at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.invocationHelper(JavacTaskImpl.java:152)
        ... 158 more

[bmuskalla]

Are you sure you did use 7.0-RC-1 and not 7.0-M1? The above issue should have been fixed in M2 and later. I've quickly played around with the project and can't reproduce it with RC1 (and was able to reproduce the issue with M1).
I used

$ gradle clean assemble

to reproduce.

[graemerocher]

hmm maybe I ran it with the wrapper which was still at 6.8.. sorry for the noise

[bmuskalla]

No problem, glad it's not a problem anymore :)

[huongnguyen2-futa]

You need to down your SDK version. I down to openjdk 15.0.2 2021-01-19. It's run well

[huongnguyen2-futa]

You need to down your SDK version. I down to openjdk 15.0.2 2021-01-19. It's run well

[SalahAdDin]

You need to down your SDK version. I down to openjdk 15.0.2 2021-01-19. It's run well

I have the same problem with the official release.

I solved it by downgrading the SDK version, but it should be not required since getting old versions from the official Java website requires to login there while the last one does not need it.