javadoc: error - An internal exception has occurred. (java.lang.AssertionError) Please file a bug against the javadoc tool via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include error messages and the following diagnostic in your report. Thank you. java.lang.AssertionError at jdk.compiler/com.sun.tools.javac.util.Assert.error(Assert.java:155) at jdk.compiler/com.sun.tools.javac.util.Assert.checkNonNull(Assert.java:62) at jdk.compiler/com.sun.tools.javac.comp.Annotate.fromAnnotations(Annotate.java:167) at jdk.compiler/com.sun.tools.javac.comp.Annotate.lambda$annotateTypeSecondStage$5(Annotate.java:1025) at jdk.compiler/com.sun.tools.javac.comp.Annotate.flush(Annotate.java:194) at jdk.compiler/com.sun.tools.javac.code.ClassFinder.complete(ClassFinder.java:307) at jdk.compiler/com.sun.tools.javac.code.Symbol.complete(Symbol.java:642) at jdk.compiler/com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:1326) at jdk.compiler/com.sun.tools.javac.code.Symbol.apiComplete(Symbol.java:648) at jdk.compiler/com.sun.tools.javac.code.Symbol$ClassSymbol.getSuperclass(Symbol.java:1353) at jdk.compiler/com.sun.tools.javac.code.Types$15.visitClassType(Types.java:2476) at jdk.compiler/com.sun.tools.javac.code.Types$15.visitClassType(Types.java:2465) at jdk.compiler/com.sun.tools.javac.code.Type$ClassType.accept(Type.java:993) at jdk.compiler/com.sun.tools.javac.code.Types$UnaryVisitor.visit(Types.java:4937) at jdk.compiler/com.sun.tools.javac.code.Types.supertype(Types.java:2462) at jdk.compiler/com.sun.tools.javac.code.Types$12.visitClassType(Types.java:2128) at jdk.compiler/com.sun.tools.javac.code.Types$12.visitClassType(Types.java:2117) at jdk.compiler/com.sun.tools.javac.code.Type$ClassType.accept(Type.java:993) at jdk.compiler/com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4857) at jdk.compiler/com.sun.tools.javac.code.Types.asSuper(Types.java:2114) at jdk.compiler/com.sun.tools.javac.code.Types$12.visitClassType(Types.java:2130) at jdk.compiler/com.sun.tools.javac.code.Types$12.visitClassType(Types.java:2117) at jdk.compiler/com.sun.tools.javac.code.Type$ClassType.accept(Type.java:993) at jdk.compiler/com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4857) at jdk.compiler/com.sun.tools.javac.code.Types.asSuper(Types.java:2114) at jdk.compiler/com.sun.tools.javac.code.Types$4.visitClassType(Types.java:1179) at jdk.compiler/com.sun.tools.javac.code.Types$4.visitClassType(Types.java:1100) at jdk.compiler/com.sun.tools.javac.code.Type$ClassType.accept(Type.java:993) at jdk.compiler/com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4857) at jdk.compiler/com.sun.tools.javac.code.Types.isSubtype(Types.java:1096) at jdk.compiler/com.sun.tools.javac.code.Types.isSubtypeUncheckedInternal(Types.java:1022) at jdk.compiler/com.sun.tools.javac.code.Types.isSubtypeUnchecked(Types.java:1008) at jdk.compiler/com.sun.tools.javac.code.Types.isConvertible(Types.java:607) at jdk.compiler/com.sun.tools.javac.code.Types.isAssignable(Types.java:2319) at jdk.compiler/com.sun.tools.javac.code.Types.isAssignable(Types.java:2287) at jdk.compiler/com.sun.tools.javac.model.JavacTypes.isAssignable(JavacTypes.java:105) at jdk.compiler/com.sun.tools.doclint.Checker.isThrowable(Checker.java:952) at jdk.compiler/com.sun.tools.doclint.Checker.visitThrows(Checker.java:929) at jdk.compiler/com.sun.tools.doclint.Checker.visitThrows(Checker.java:103) at jdk.compiler/com.sun.tools.javac.tree.DCTree$DCThrows.accept(DCTree.java:932) at jdk.compiler/com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:71) at jdk.compiler/com.sun.source.util.DocTreeScanner.scanAndReduce(DocTreeScanner.java:83) at jdk.compiler/com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:98) at jdk.compiler/com.sun.source.util.DocTreeScanner.scanAndReduce(DocTreeScanner.java:106) at jdk.compiler/com.sun.source.util.DocTreeScanner.visitDocComment(DocTreeScanner.java:185) at jdk.compiler/com.sun.tools.doclint.Checker.visitDocComment(Checker.java:234) at jdk.compiler/com.sun.tools.doclint.Checker.visitDocComment(Checker.java:103) at jdk.compiler/com.sun.tools.javac.tree.DCTree$DCDocComment.accept(DCTree.java:138) at jdk.compiler/com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:50) at jdk.compiler/com.sun.tools.doclint.Checker.scan(Checker.java:196) at jdk.compiler/com.sun.tools.doclint.DocLint.scan(DocLint.java:355) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.WorkArounds.runDocLint(WorkArounds.java:110) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.Utils.getDocCommentTree0(Utils.java:3040) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.Utils.getDocCommentTree(Utils.java:3087) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.Utils$WeakSoftHashMap.computeIfAbsent(Utils.java:3276) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.Utils.getCommentHelper(Utils.java:2873) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.Utils.hasBlockTag(Utils.java:2955) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.Utils.hasBlockTag(Utils.java:2951) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.Utils.hasHiddenTag(Utils.java:1435) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.VisibleMemberTable.mustDocument(VisibleMemberTable.java:423) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:176) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.VisibleMemberTable.computeVisibleMembers(VisibleMemberTable.java:416) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.VisibleMemberTable.computeVisibleMembers(VisibleMemberTable.java:382) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.VisibleMemberTable.ensureInitialized(VisibleMemberTable.java:145) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.VisibleMemberTable.getVisibleMembers(VisibleMemberTable.java:194) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.VisibleMemberTable.getVisibleMembers(VisibleMemberTable.java:213) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.MemberSummaryBuilder$PropertyHelper.computeProperties(MemberSummaryBuilder.java:524) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.MemberSummaryBuilder$PropertyHelper.<init>(MemberSummaryBuilder.java:519) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.MemberSummaryBuilder.<init>(MemberSummaryBuilder.java:91) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.MemberSummaryBuilder$1.<init>(MemberSummaryBuilder.java:104) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.MemberSummaryBuilder.getInstance(MemberSummaryBuilder.java:104) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.BuilderFactory.getMemberSummaryBuilder(BuilderFactory.java:244) at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.ClassWriterImpl.getHeader(ClassWriterImpl.java:107) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.ClassBuilder.buildClassDoc(ClassBuilder.java:138) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.builders.ClassBuilder.build(ClassBuilder.java:120) at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDoclet.generateClassFiles(HtmlDoclet.java:266) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:273) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.AbstractDoclet.startGeneration(AbstractDoclet.java:207) at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.AbstractDoclet.run(AbstractDoclet.java:114) at jdk.javadoc/jdk.javadoc.doclet.StandardDoclet.run(StandardDoclet.java:72) at jdk.javadoc/jdk.javadoc.internal.tool.Start.parseAndExecute(Start.java:582) at jdk.javadoc/jdk.javadoc.internal.tool.Start.begin(Start.java:431) at jdk.javadoc/jdk.javadoc.internal.tool.Start.begin(Start.java:344) at jdk.javadoc/jdk.javadoc.internal.tool.Main.execute(Main.java:63) at jdk.javadoc/jdk.javadoc.internal.tool.Main.main(Main.java:52) Command line was: /home/jenkins/tools/hudson.model.JDK/jdk11/jdk-11/bin/javadoc @options @packages Refer to the generated Javadoc files in '/home/jenkins/workspace/Core_jenkins_PR-3636-W6Q6NSPPL4GMIEMSNTFVLOUULRIATX5ZDR2JTDACLXWSGTUDBJZQ/core/target/apidocs' dir. at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.executeJavadocCommandLine (AbstractJavadocMojo.java:5075) at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.executeReport (AbstractJavadocMojo.java:2093) at org.apache.maven.plugins.javadoc.JavadocJar.doExecute (JavadocJar.java:188) at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.execute (AbstractJavadocMojo.java:1889) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81) at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128) at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305) at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192) at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105) at org.apache.maven.cli.MavenCli.execute (MavenCli.java:954) at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288) at org.apache.maven.cli.MavenCli.main (MavenCli.java:192) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62) at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke (Method.java:566) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289) at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415) at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)