"USE_NATIVE_IMAGE_JAVA_PLATFORM_MODULE_SYSTEM= false" is broken with JDK 21

[geofjamg]

Hi all,

Even with a very simple project like this one: https://github.com/geofjamg/buggraalvm
When we compile to a shared library using Oracle GraalVM JDK 21 (graalvm-jdk-21.0.1+12.1)

export JAVA_HOME=<DIR>/graalvm-jdk-21.0.1+12.1/Contents/Home 
export USE_NATIVE_IMAGE_JAVA_PLATFORM_MODULE_SYSTEM=false
<DIR>/graalvm-jdk-21.0.1+12.1/Contents/Home/bin/native-image --class-path target/buggraalvm-1.0-SNAPSHOT.jar --shared -o buggraalvm

We get the error:

Warning: The USE_NATIVE_IMAGE_JAVA_PLATFORM_MODULE_SYSTEM environment variable is deprecated and might be removed in a future release. Please refer to the GraalVM release notes.
Exception in thread "main" com.oracle.svm.util.ModuleSupport$ModuleSupportError: open of packages from module org.graalvm.polyglot to ALL-UNNAMED failed. No module named org.graalvm.polyglot in boot layer.
	at com.oracle.svm.util.ModuleSupport.accessPackagesToClass(ModuleSupport.java:123)
	at com.oracle.svm.hosted.NativeImageGeneratorRunner$JDK9Plus.setModuleAccesses(NativeImageGeneratorRunner.java:741)
	at com.oracle.svm.hosted.NativeImageGeneratorRunner$JDK9Plus.main(NativeImageGeneratorRunner.java:733)

The same project compiles perfectly with Oracle GraalVM JDK 17.

[TheTaha-Alamine]

Hi @geofjamg could you give us the OS specifications you're working with? Thank you.

[geofjamg]

uname -a
Darwin mbp-de-xxx.home 23.1.0 Darwin Kernel Version 23.1.0: Mon Oct  9 21:27:24 PDT 2023; root:xnu-10002.41.9~6/RELEASE_ARM64_T6000 arm64

[geofjamg]

But I don't think it is an issue specific to the OS. I have same exception on a Linux Ubuntu AMD64.

[selhagani]

Hi @geofjamg, there seems to be an issue with the link you provided for the project. It says page not found. Can you double check it please?

[geofjamg]

I switched the repo to public. Is it ok now?

[selhagani]

@geofjamg Yes it's public now thank you. Our team is working on this.

[selhagani]

@geofjamg

You no longer need to run this command "export USE_NATIVE_IMAGE_JAVA_PLATFORM_MODULE_SYSTEM=false" when using graalvm-jdk-21.0.1+12.1. It is deprecated. This should solve the issue you're facing with graalvm-jdk-21.0.1+12.1.

[geofjamg]

Thank you, indeed it works. I only had to add "--add-exports=org.graalvm.nativeimage.builder/com.oracle.svm.core.c=ALL-UNNAMED" to the native image command in my real application (no idea why it is not needed in the simple test case). Otherwise I get the error:

    > java.lang.IllegalAccessError: class com.powsybl.python.commons.Directives (in unnamed module @0x730e5763) cannot access class com.oracle.svm.core.c.ProjectHeaderFile (in module org.graalvm.nativeimage.builder) because module org.graalvm.nativeimage.builder does not export com.oracle.svm.core.c to unnamed module @0x730e5763

This is related to this dependency that is needed to get access to com.oracle.svm.core.c.ProjectHeaderFile for configuring the CContext.Directives:

      <dependency>
          <groupId>org.graalvm.nativeimage</groupId>
          <artifactId>svm</artifactId>
          <version>${graalvm.version}</version>
          <scope>provided</scope>
      </dependency>

Is it something expected? It was not needed with JDK 17.

[geofjamg]

@selhagani if I can suggest some changes:

• The USE_NATIVE_IMAGE_JAVA_PLATFORM_MODULE_SYSTEM variable not needed anymore could be specified in release notes / migration guide https://www.graalvm.org/release-notes/JDK_21/ or maybe in the change log.
• If USE_NATIVE_IMAGE_JAVA_PLATFORM_MODULE_SYSTEM is not needed anymore, whatever its value or if it sets or not, we should have the same behavior of native image and no failure of the variable is set.

[selhagani]

Hi @geofjamg thanks for the suggestions! I will share them with our dev team.