Unsafe.defineAnonymousClass no longer exists in Java17!

[Luc Chapon]

This is my StackTrace.
Since the line shown is the one trying to load a non existent method, I
assumed that was the problem.
The Exception seems to be NoClassDefFoundError instead…

The environement is Wildfly 30 / jdk 17

18:31:00,119 ERROR [io.undertow.request] (default task-2) UT005023:
Exception handling request to /HNS/HNSAdmin/query.pilot:
java.lang.NoClassDefFoundError: sun/misc/Unsafe

at
deployment.HNS.war//org.openjdk.nashorn.internal.runtime.Context$AnonymousContextCodeInstaller.lambda$getDefineAnonymousClass$0(
Context.java:330)

at java.base/java.security.AccessController.doPrivileged(
AccessController.java:318)

at
deployment.HNS.war//org.openjdk.nashorn.internal.runtime.Context$AnonymousContextCodeInstaller.getDefineAnonymousClass(
Context.java:328)

at
deployment.HNS.war//org.openjdk.nashorn.internal.runtime.Context$AnonymousContextCodeInstaller.<clinit>(
Context.java:317)

at
deployment.HNS.war//org.openjdk.nashorn.internal.runtime.Context.lambda$compile$9(
Context.java:1506)

at
deployment.HNS.war//org.openjdk.nashorn.internal.runtime.ScriptEnvironment.useAnonymousClasses(
ScriptEnvironment.java:491)

at deployment.HNS.war//org.openjdk.nashorn.internal.runtime.Context.compile(
Context.java:1506)

at
deployment.HNS.war//org.openjdk.nashorn.internal.runtime.Context.compileScript(
Context.java:1451)

at
deployment.HNS.war//org.openjdk.nashorn.internal.runtime.Context.compileScript(
Context.java:761)

at
deployment.HNS.war//org.openjdk.nashorn.api.scripting.NashornScriptEngine.compileImpl(
NashornScriptEngine.java:528)

at
deployment.HNS.war//org.openjdk.nashorn.api.scripting.NashornScriptEngine.compileImpl(
NashornScriptEngine.java:517)

at
deployment.HNS.war//org.openjdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(
NashornScriptEngine.java:395)

at
deployment.HNS.war//org.openjdk.nashorn.api.scripting.NashornScriptEngine.eval(
NashornScriptEngine.java:151)

at java.scripting/javax.script.AbstractScriptEngine.eval(
AbstractScriptEngine.java:262)



Le mer. 24 janv. 2024 à 18:20, Attila Szegedi <szegedia at gmail.com> a écrit :

> Hi!
>
> Are you experiencing this with Nashorn 15.4 from
> https://github.com/openjdk/nashorn? This issue is supposed to have been
> fixed since Nashorn 15.3 in this change
> https://github.com/openjdk/nashorn/pull/16 according to the changelog:
> https://github.com/openjdk/nashorn/blob/main/CHANGELOG.md
>
> You say it fails, but it’s encased in a try-catch specifically for this
> reason. Can you give me a stack trace of how it fails?
>
> Attila.
>
>
> On 2024. Jan 24., at 13:02, Luc Chapon <sxilderik at gmail.com> wrote:
>
> Hello all
>
> First message here
>
> We are facing a problem re Nashorn (latest) and java17
>
> In Context.java, line 330, you try to get a handle to a no longer existent
> method, Unsafe.defineAnonymousClass
>
> And fail of course.
>
> I’m trying to rewrite this part for our own temporary urgent need
> according to this.
>
> https://www.oracle.com/java/technologies/javase/17-relnote-issues.html
>
> core-libs
> *➜
> <https://www.oracle.com/java/technologies/javase/17-relnote-issues.html#JDK-8243287> Removal
> of sun.misc.Unsafe::defineAnonymousClass*
>
> sun.misc.Unsafe::defineAnonymousClass API has been removed in JDK 17. The
> API replacement is
> java.lang.invoke.MethodHandles.Lookup::defineHiddenClass and
> java.lang.invoke.MethodHandles.Lookup::defineHiddenClassWithClassData.
>
>
> Are you aware of the problem? Is there a fix already available?
>
> Thank you!
>
> Luc Chapon
> ChapsVision
> Suresnes, France
>
>
>
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