Petr Široký created DROOLS-1780: ----------------------------------- Summary: JDK 9 kie-internal: javadoc plugin fails with NPE Key: DROOLS-1780 URL: https://issues.jboss.org/browse/DROOLS-1780 Project: Drools Issue Type: Bug Components: build Affects Versions: 7.4.1.Final Reporter: Petr Široký Assignee: Petr Široký Running on latest JDK 9 (9.0.1) + Maven 3.5.2, maven-javadoc-plugin (3.0.0-M1) fails with NPE when generating the javadoc for kie-internal. The plugin is supposed to be compatible with JDK 9. Based on the reported error this could also be a bug in the javadoc tool itself: {code} [ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.0.0-M1:javadoc (default-cli) on project kie-internal: An error has occurred in Javadoc report generation: [ERROR] Exit code: 1 - javadoc: error - An exception occurred while building a component: MethodsSummary [ERROR] (java.lang.NullPointerException) [ERROR] Please file a bug against the javadoc tool via the Java bug reporting page [ERROR] (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) [ERROR] for duplicates. Include error messages and the following diagnostic in your report. Thank you. [ERROR] java.lang.NullPointerException [ERROR] at jdk.compiler/com.sun.tools.javac.api.JavacTrees.attributeDocReference(JavacTrees.java:445) [ERROR] at jdk.compiler/com.sun.tools.javac.api.JavacTrees.getElement(JavacTrees.java:405) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.CommentHelper.getElement(CommentHelper.java:178) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.CommentHelper$3.visitReference(CommentHelper.java:459) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.CommentHelper$3.visitReference(CommentHelper.java:433) [ERROR] at jdk.compiler/com.sun.tools.javac.tree.DCTree$DCReference.accept(DCTree.java:631) [ERROR] at jdk.compiler/com.sun.source.util.SimpleDocTreeVisitor.visit(SimpleDocTreeVisitor.java:79) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.CommentHelper$3.visitLink(CommentHelper.java:444) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.CommentHelper$3.visitLink(CommentHelper.java:433) [ERROR] at jdk.compiler/com.sun.tools.javac.tree.DCTree$DCLink.accept(DCTree.java:500) [ERROR] at jdk.compiler/com.sun.source.util.SimpleDocTreeVisitor.visit(SimpleDocTreeVisitor.java:79) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.CommentHelper.getReferencedElement(CommentHelper.java:476) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.CommentHelper.getReferencedClass(CommentHelper.java:365) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDocletWriter.seeTagToContent(HtmlDocletWriter.java:1510) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDocletWriter$2.visitLink(HtmlDocletWriter.java:1949) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDocletWriter$2.visitLink(HtmlDocletWriter.java:1797) [ERROR] at jdk.compiler/com.sun.tools.javac.tree.DCTree$DCLink.accept(DCTree.java:500) [ERROR] at jdk.compiler/com.sun.source.util.SimpleDocTreeVisitor.visit(SimpleDocTreeVisitor.java:79) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDocletWriter.commentTagsToContent(HtmlDocletWriter.java:2017) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDocletWriter.addCommentTags(HtmlDocletWriter.java:1719) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDocletWriter.addCommentTags(HtmlDocletWriter.java:1700) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDocletWriter.addSummaryComment(HtmlDocletWriter.java:1670) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.SubWriterHolderWriter.addIndexComment(SubWriterHolderWriter.java:207) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.SubWriterHolderWriter.addSummaryLinkComment(SubWriterHolderWriter.java:243) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.AbstractMemberWriter.addMemberSummary(AbstractMemberWriter.java:533) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.MemberSummaryBuilder.buildSummary(MemberSummaryBuilder.java:359) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.MemberSummaryBuilder.addSummary(MemberSummaryBuilder.java:515) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.MemberSummaryBuilder.buildMethodsSummary(MemberSummaryBuilder.java:309) [ERROR] at jdk.internal.reflect.GeneratedMethodAccessor26.invoke(Unknown Source) [ERROR] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [ERROR] at java.base/java.lang.reflect.Method.invoke(Method.java:564) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.AbstractBuilder.build(AbstractBuilder.java:157) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.AbstractMemberBuilder.build(AbstractMemberBuilder.java:87) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.AbstractBuilder.buildChildren(AbstractBuilder.java:200) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.ClassBuilder.buildMemberSummary(ClassBuilder.java:333) [ERROR] at jdk.internal.reflect.GeneratedMethodAccessor20.invoke(Unknown Source) [ERROR] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [ERROR] at java.base/java.lang.reflect.Method.invoke(Method.java:564) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.AbstractBuilder.build(AbstractBuilder.java:157) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.AbstractBuilder.buildChildren(AbstractBuilder.java:200) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.ClassBuilder.buildClassDoc(ClassBuilder.java:155) [ERROR] at jdk.internal.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) [ERROR] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [ERROR] at java.base/java.lang.reflect.Method.invoke(Method.java:564) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.AbstractBuilder.build(AbstractBuilder.java:157) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.ClassBuilder.build(ClassBuilder.java:125) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDoclet.generateClassFiles(HtmlDoclet.java:263) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:273) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.AbstractDoclet.startGeneration(AbstractDoclet.java:207) [ERROR] at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.AbstractDoclet.run(AbstractDoclet.java:117) [ERROR] at jdk.javadoc/jdk.javadoc.doclet.StandardDoclet.run(StandardDoclet.java:72) [ERROR] at jdk.javadoc/jdk.javadoc.internal.tool.Start.parseAndExecute(Start.java:574) [ERROR] at jdk.javadoc/jdk.javadoc.internal.tool.Start.begin(Start.java:423) [ERROR] at jdk.javadoc/jdk.javadoc.internal.tool.Start.begin(Start.java:340) [ERROR] at jdk.javadoc/jdk.javadoc.internal.tool.Main.execute(Main.java:63) [ERROR] at jdk.javadoc/jdk.javadoc.internal.tool.Main.main(Main.java:52) [ERROR] [ERROR] Command line was: /opt/tools/jdk9/bin/javadoc -J-Xmx512m -J-Xms128m @options @packages {code} -- This message was sent by Atlassian JIRA (v7.5.0#75005)