java.lang.IllegalArgumentException: Cannot decrease processed workunit count (500) to lower value than before (1000)
   at org.netbeans.modules.progress.spi.InternalHandle.progress(InternalHandle.java:267)
   at org.netbeans.api.progress.ProgressHandle.progress(ProgressHandle.java:184)
   at org.netbeans.api.progress.ProgressHandle.progress(ProgressHandle.java:164)
   at org.netbeans.modules.analysis.spi.Analyzer$Context.progress(Analyzer.java:182)
   at org.netbeans.modules.findbugs.AnalyzerImpl$1.finishPerClassAnalysis(AnalyzerImpl.java:231)
   at edu.umd.cs.findbugs.FindBugs2.analyzeApplication(FindBugs2.java:1227)
   at edu.umd.cs.findbugs.FindBugs2.execute(FindBugs2.java:278)
   at org.netbeans.modules.findbugs.RunFindBugs.runFindBugs(RunFindBugs.java:214)
   at org.netbeans.modules.findbugs.AnalyzerImpl$2.run(AnalyzerImpl.java:237)
   at org.netbeans.modules.findbugs.AnalyzerImpl$2.run(AnalyzerImpl.java:235)
   at org.netbeans.modules.java.source.parsing.MimeTask.run(MimeTask.java:83)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:583)
   at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:376)
   at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:360)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:200)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:197)
   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.impl.Utilities.runPriorityIO(Utilities.java:72)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:197)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:331)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:417)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:409)
   at org.netbeans.modules.findbugs.AnalyzerImpl.doRunFindBugs(AnalyzerImpl.java:235)
   at org.netbeans.modules.findbugs.AnalyzerImpl.analyze(AnalyzerImpl.java:132)
   at org.netbeans.modules.analysis.RunAnalysis$1$1.doRunAnalyzer(RunAnalysis.java:206)
   at org.netbeans.modules.analysis.RunAnalysis$1$1.run(RunAnalysis.java:159)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)
Caused: org.openide.util.RequestProcessor$FastItem: task failed due to: java.lang.IllegalArgumentException: Cannot decrease processed workunit count (500) to lower value than before (1000)