java.lang.NoClassDefFoundError: com/sun/tools/doclint/HtmlTag
   at org.netbeans.modules.javadoc.hints.Analyzer.visitEndElement(Analyzer.java:327)
   at org.netbeans.modules.javadoc.hints.Analyzer.visitEndElement(Analyzer.java:137)
   at com.sun.tools.javac.tree.DCTree$DCEndElement.accept(DCTree.java:308)
   at com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:71)
   at org.netbeans.modules.javadoc.hints.Analyzer.scan(Analyzer.java:773)
   at org.netbeans.modules.javadoc.hints.Analyzer.scan(Analyzer.java:137)
   at com.sun.source.util.DocTreeScanner.scanAndReduce(DocTreeScanner.java:84)
   at com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:99)
   at com.sun.source.util.DocTreeScanner.scanAndReduce(DocTreeScanner.java:107)
   at com.sun.source.util.DocTreeScanner.visitParam(DocTreeScanner.java:298)
   at org.netbeans.modules.javadoc.hints.Analyzer.visitParam(Analyzer.java:442)
   at org.netbeans.modules.javadoc.hints.Analyzer.visitParam(Analyzer.java:137)
   at com.sun.tools.javac.tree.DCTree$DCParam.accept(DCTree.java:503)
   at com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:71)
   at org.netbeans.modules.javadoc.hints.Analyzer.scan(Analyzer.java:773)
   at org.netbeans.modules.javadoc.hints.Analyzer.scan(Analyzer.java:137)
   at com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:99)
   at com.sun.source.util.DocTreeScanner.scanAndReduce(DocTreeScanner.java:107)
   at com.sun.source.util.DocTreeScanner.visitDocComment(DocTreeScanner.java:186)
   at org.netbeans.modules.javadoc.hints.Analyzer.visitDocComment(Analyzer.java:291)
   at org.netbeans.modules.javadoc.hints.Analyzer.visitDocComment(Analyzer.java:137)
   at com.sun.tools.javac.tree.DCTree$DCDocComment.accept(DCTree.java:135)
   at com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:50)
   at org.netbeans.modules.javadoc.hints.Analyzer.analyze(Analyzer.java:191)
   at org.netbeans.modules.javadoc.hints.JavadocHint.errorHint(JavadocHint.java:217)
   at sun.reflect.GeneratedMethodAccessor155.invoke(GeneratedMethodAccessor155.java:0)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:498)
   at org.netbeans.modules.java.hints.providers.code.CodeHintProviderImpl$WorkerImpl.createErrors(CodeHintProviderImpl.java:340)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.runHint(HintsInvoker.java:821)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.access$400(HintsInvoker.java:113)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.runAndAdd(HintsInvoker.java:680)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.scanDoNotGoDeeper(HintsInvoker.java:734)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeSuggestions(HintsInvoker.java:408)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:244)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:216)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:189)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:151)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:137)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:88)
   at org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:298)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:584)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:809)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:725)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:686)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)