Does Nashorn (org.openjdk.nashorn) have any support for Java 17?

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I am trying to run an ANT build of our product using nashorn-core:15.1.1.jar with Java 17 (pre-release - build 27) and I get:

BUILD FAILED
java.lang.ExceptionInInitializerError
    at org.openjdk.nashorn.internal.runtime.Context.compile(Context.java:1509)
    at org.openjdk.nashorn.internal.runtime.Context.compileScript(Context.java:1449)
    at org.openjdk.nashorn.internal.runtime.Context.compileScript(Context.java:759)
    at org.openjdk.nashorn.api.scripting.NashornScriptEngine.compileImpl(NashornScriptEngine.java:528)
    at org.openjdk.nashorn.api.scripting.NashornScriptEngine.compileImpl(NashornScriptEngine.java:517)
    at org.openjdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:395)
    at org.openjdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:151)
    at java.scripting/javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:262)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at org.apache.tools.ant.util.ReflectUtil.invoke(ReflectUtil.java:108)
    at org.apache.tools.ant.util.ReflectWrapper.invoke(ReflectWrapper.java:81)
    at org.apache.tools.ant.util.optional.JavaxScriptRunner.evaluateScript(JavaxScriptRunner.java:103)
    at org.apache.tools.ant.util.optional.JavaxScriptRunner.executeScript(JavaxScriptRunner.java:67)
    at org.apache.tools.ant.taskdefs.optional.Script.execute(Script.java:52)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
    at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
    at org.apache.tools.ant.Task.perform(Task.java:348)
    at org.apache.tools.ant.Target.execute(Target.java:392)
    at org.apache.tools.ant.Target.performTasks(Target.java:413)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
    at org.apache.tools.ant.Main.runBuild(Main.java:811)
    at org.apache.tools.ant.Main.startAnt(Main.java:217)
    at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
    at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
Caused by: java.lang.RuntimeException: java.lang.NoSuchMethodException: no such method: sun.misc.Unsafe.defineAnonymousClass(Class,byte[],Object[])Class/invokeVirtual
    at org.openjdk.nashorn.internal.runtime.Context$AnonymousContextCodeInstaller.lambda$getDefineAnonymousClass$0(Context.java:335)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
    at org.openjdk.nashorn.internal.runtime.Context$AnonymousContextCodeInstaller.getDefineAnonymousClass(Context.java:327)
    at org.openjdk.nashorn.internal.runtime.Context$AnonymousContextCodeInstaller.<clinit>(Context.java:317)
    ... 33 more
Caused by: java.lang.NoSuchMethodException: no such method: sun.misc.Unsafe.defineAnonymousClass(Class,byte[],Object[])Class/invokeVirtual
    at java.base/java.lang.invoke.MemberName.makeAccessException(MemberName.java:976)
    at java.base/java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:1117)
    at java.base/java.lang.invoke.MethodHandles$Lookup.resolveOrFail(MethodHandles.java:3643)
    at java.base/java.lang.invoke.MethodHandles$Lookup.findVirtual(MethodHandles.java:2680)
    at org.openjdk.nashorn.internal.runtime.Context$AnonymousContextCodeInstaller.lambda$getDefineAnonymousClass$0(Context.java:329)
    ... 36 more
Caused by: java.lang.NoSuchMethodError: 'java.lang.Class sun.misc.Unsafe.defineAnonymousClass(java.lang.Class, byte[], java.lang.Object[])'
    at java.base/java.lang.invoke.MethodHandleNatives.resolve(Native Method)
    at java.base/java.lang.invoke.MemberName$Factory.resolve(MemberName.java:1085)
    at java.base/java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:1114)
    ... 39 more

I might be too early for being able to use Nashorn with Java 17, but figured I would check.

nashorn java
2 Answers

Yes, OpenJDK Nashorn supports Java 17 starting with version 15.3.

It had to be adapted to gracefully handle the fact defineAnonymousClass method was removed from the Unsafe class in Java 17.

user_1315520

Unfortunately, support for Java Nashorn has been removed from Java 15 onwards and it is going to stay that way. It had been deprecated since Java 11 onwards.

I suggest,if possible, migrating to GraalVM JavaScript which is actively maintained. The main reason Nashhorn had been removed from Java 15 onwards.

The Nashorn JavaScript engine was first incorporated into JDK 8 via JEP 174 as a replacement for the Rhino scripting engine. When it was released, it was a complete implementation of the ECMAScript-262 5.1 standard.With the rapid pace at which ECMAScript language constructs, along with APIs, are adapted and modified, we have found Nashorn challenging to maintain.

user_63546760
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