InaccessibleObjectException with jdk9 jigsaw b136

[eriwen]

From https://discuss.gradle.org/t/jigsaw-b136-gradle-problem/19580

This is with gradle 3.0 and jdk9 jigsaw b136:

Stacktrace

[12:00:28][Gradle failure report] Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected java.lang.Package[] java.lang.ClassLoader.getPackages() accessible: module java.base does not "exports private java.lang" to unnamed module @6ca18a14 [12:00:28][Gradle failure report] at java.base/jdk.internal.reflect.Reflection.throwInaccessibleObjectException(Reflection.java:414) [12:00:28][Gradle failure report] at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:196) [12:00:28][Gradle failure report] at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:192) [12:00:28][Gradle failure report] at java.base/java.lang.reflect.Method.setAccessible(Method.java:186) [12:00:28][Gradle failure report] at org.gradle.internal.reflect.JavaMethod.(JavaMethod.java:34) [12:00:28][Gradle failure report] at org.gradle.internal.reflect.JavaMethod.(JavaMethod.java:38) [12:00:28][Gradle failure report] at org.gradle.internal.reflect.JavaReflectionUtil.method(JavaReflectionUtil.java:224) [12:00:28][Gradle failure report] at org.gradle.internal.classloader.FilteringClassLoader.(FilteringClassLoader.java:49)[12:00:28][Gradle failure report] ... 46 more

https://mail-archives.apache.org/mod_mbox/groovy-dev/201609.mbox/%3CCADQzvmn_NqB843%3DTVJFvZww7KDcEgxG2Xsr5dDHWkLtq_ZMXEg%40mail.gmail.com%3E

[adammurdoch]

On Java 9 we can now use the public ClassLoader.getDefinedPackages() instead of using reflection to get at the protected ClassLoader.getPackages().

There's a quick hacky fix for this in this branch: https://github.com/gradle/gradle/tree/am-jigsaw-hacks

[McPringle]

A few weeks later there is still the same problem with OpenJDK 9 build 150 and Gradle 3.3-rc-1. Even more worse: I can't find any information about the actual status of Gradle and JRE 9 or a timeline. Gradle really needs to run on JRE 9 soon – we can be happy that Oracle had to postpone the release of JDK 9 once more…

[oehme]

This was fixed in 4.10.