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https://issues.apache.org/jira/browse/LUCENE-9650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17255973#comment-17255973
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Uwe Schindler commented on LUCENE-9650:
---------------------------------------
My testing:
{noformat}
> gradlew compileJava -Druntime.java.home=/path/to/jdk-16
To honour the JVM settings for this build a new JVM will be forked. Please
consider using the daemon:
https://docs.gradle.org/6.6.1/userguide/gradle_daemon.html.
Daemon will be stopped at the end of the build stopping after processing
> Configure project :
WARNING: errorprone disabled (won't work with JDK 16)
> Task :altJvmWarning
NOTE: Alternative java toolchain will be used for compilation and tests:
Project will use Java 16 from: C:\Program Files\java\jdk-16
Gradle runs with Java 11 from: C:\Program Files\Java\jdk-11.0.8
> Task :solr:solrj:compileJava
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
{noformat}
Without this patch it fails as on Jenkins.
> Errorprone on master/gradle no longer works with JDK-16
> -------------------------------------------------------
>
> Key: LUCENE-9650
> URL: https://issues.apache.org/jira/browse/LUCENE-9650
> Project: Lucene - Core
> Issue Type: Bug
> Components: general/build
> Affects Versions: master (9.0)
> Reporter: Uwe Schindler
> Assignee: Dawid Weiss
> Priority: Major
> Fix For: master (9.0)
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> JDK-16 no longer allows access to internal classes of any module by default.
> It looks like errorprone tries to access some internals from the Java
> compiler. This now fails with Exception. You have to fully open the module or
> pass `--illegal-access=allow`.
> We have 3 options:
> - install an update of errorprone
> - disable error-prone if we detect a runtimeJdk with version >=16
> - run javac as a separate forked task (i think we do already) and pass
> `--illegal-access=allow` or open the internal compile module.
> Error message:
> {noformat}
> > Task :solr:solr-ref-guide:compileJava FAILED
> Exception in thread "main" java.lang.IllegalAccessError: class
> com.google.errorprone.ErrorProneJavacPlugin (in unnamed module @0x887af79)
> cannot access class com.sun.tools.javac.api.BasicJavacTask (in module
> jdk.compiler) because module jdk.compiler does not export
> com.sun.tools.javac.api to unnamed module @0x887af79
> at
> com.google.errorprone.ErrorProneJavacPlugin.init(ErrorProneJavacPlugin.java:38)
> at
> jdk.compiler/com.sun.tools.javac.api.BasicJavacTask.initPlugin(BasicJavacTask.java:254)
> at
> jdk.compiler/com.sun.tools.javac.api.BasicJavacTask.initPlugins(BasicJavacTask.java:228)
> at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:292)
> at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:176)
> at jdk.compiler/com.sun.tools.javac.Main.compile(Main.java:64)
> at jdk.compiler/com.sun.tools.javac.Main.main(Main.java:50)
> {noformat}
> Last failed build:
> https://jenkins.thetaphi.de/job/Lucene-Solr-master-Linux/29129/
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