[jboss-jira] [JBoss JIRA] (DROOLS-1780) JDK 9 kie-internal: javadoc plugin fails with NPE

Petr Široký (JIRA) issues at jboss.org
Thu Oct 26 05:38:00 EDT 2017 

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}



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