java.lang.NoClassDefFoundError: Could not initialize class org.netbeans.modules.java.hints.jackpot.impl.RulesManager
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker.computeHints(HintsInvoker.java:147)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker.computeHints(HintsInvoker.java:140)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker.run(HintsInvoker.java:118)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker.run(HintsInvoker.java:105)
   at org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:291)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:654)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
   at java.util.concurrent.FutureTask.run(FutureTask.java:138)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
   at java.lang.Thread.run(Thread.java:619)