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https://issues.apache.org/jira/browse/SLING-9824?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Munteanu updated SLING-9824:
-----------------------------------
    Fix Version/s: Starter 12

> sun.misc.Unsafe accessible in Sling Starter 12
> ----------------------------------------------
>
>                 Key: SLING-9824
>                 URL: https://issues.apache.org/jira/browse/SLING-9824
>             Project: Sling
>          Issue Type: Bug
>          Components: Starter
>    Affects Versions: Starter 12
>         Environment: Sling-Starter 12-SNAPSHOT (commit addb8f7b) with JDK 11 
> and 13 on MacOS, JDK 11 on an x86_64 Linux
>            Reporter: Hans-Peter Stoerr
>            Priority: Minor
>             Fix For: Starter 12
>
>
> We are having some trouble running our application on [the current Sling 
> Starter 12 
> snapshot|https://github.com/apache/sling-org-apache-sling-starter/tree/addb8f7ba16dfb2ab6cda1a70f98a461a7cacb7a]
>  since we are using ehache 3, which uses sun.misc.Unsafe internally. This 
> works with Sling Starter 11, but since Sling Starter changed to the feature 
> launcher, this class seems to have disappeared from the classpath: the class 
> loading of ehcache classes fails with a java.lang.NoClassDefFoundError: 
> sun/misc/Unsafe
> I tried to add command line arguments
>  --add-modules=jdk.unsupported
>  and
>  --add-opens=jdk.unsupported/sun.misc=ALL-UNNAMED
>  to the launcher command line, as I've seen that suggested on the net for 
> similar problems, but it didn't help.
>  In fact, this doesn't seem to be the problem: even without those flags the 
> jdk.unsupported module does export sun.misc:
> module
> { name: jdk.unsupported@11.0.6, [mandated java.base], exports: 
> [com.sun.nio.file, sun.misc, sun.reflect], opens: [sun.misc, sun.reflect] }
> So it seems the module is loaded, but not used to load the class.
> The easiest way to reproduce the problem is to add this to some JSP:
>  <%
>  Class clazz = sun.misc.Unsafe.class;
>  %>
>  In case that matters: I tried JDK 11 and 13 on MacOS, as well as JDK 11 on 
> an x86_64 Linux.
>  This works on Sling Starter 11, but not the current 12 snapshot.
> The workaround to add 
>  {{-D org.osgi.framework.system.packages.extra=sun.misc}}
>  to the command line, which was thankfully suggested [in the mailing 
> list|https://www.mail-archive.com/users@sling.apache.org/msg05423.html], does 
> work. But I feel it is not a particularily clean solution. It also does 
> something else than what happens on Sling Starter 11 : now the sun.misc 
> package is listed in the exports list of the felix framework bundle 
>  [http://localhost:9090/system/console/bundles/0] . Not sure whether this is 
> good or bad.



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