java.lang.NoClassDefFoundError: org/netbeans/lib/nbjavac/services/NBMessager
   at org.netbeans.modules.java.source.parsing.JavacParser.createJavacTask(JavacParser.java:869)
   at org.netbeans.modules.java.source.parsing.JavacParser.createJavacTask(JavacParser.java:735)
   at org.netbeans.modules.java.source.parsing.CompilationInfoImpl.getJavacTask(CompilationInfoImpl.java:397)
   at org.netbeans.modules.java.source.parsing.CompilationInfoImpl.toPhase(CompilationInfoImpl.java:380)
   at org.netbeans.api.java.source.CompilationController.toPhase(CompilationController.java:109)
   at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.runCallable(AnnotationModelHelper.java:255)
   at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.access$100(AnnotationModelHelper.java:79)
   at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$2.run(AnnotationModelHelper.java:184)
   at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$2.run(AnnotationModelHelper.java:181)
   at org.netbeans.modules.java.source.parsing.MimeTask.run(MimeTask.java:83)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609)
   at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:380)
   at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:363)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:204)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:88)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:334)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:447)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:439)
   at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.runJavaSourceTask(AnnotationModelHelper.java:181)
   at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.runJavaSourceTask(AnnotationModelHelper.java:149)
   at org.netbeans.modules.websvc.rest.model.impl.RestServicesMetadataModelImpl.runReadAction(RestServicesMetadataModelImpl.java:77)
   at org.netbeans.modules.websvc.rest.nodes.RestServicesNodeFactory$RestNodeList$1.run(RestServicesNodeFactory.java:106)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NoClassDefFoundError: org/netbeans/lib/nbjavac/services/NBMessager
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1484)
   at org.netbeans.modules.websvc.rest.nodes.RestServicesNodeFactory$RestNodeList.keys(RestServicesNodeFactory.java:145)
   at org.netbeans.spi.project.ui.support.NodeFactorySupport$DelegateChildren$1.run(NodeFactorySupport.java:202)
   at org.openide.util.RequestProcessor$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)