java.io.IOException
   at org.netbeans.modules.java.source.parsing.WriteBackTransaction$CachedFileObject.flush(WriteBackTransaction.java:458)
   at org.netbeans.modules.java.source.parsing.WriteBackTransaction.doFlushFiles(WriteBackTransaction.java:310)
   at org.netbeans.modules.java.source.parsing.WriteBackTransaction.flushFiles(WriteBackTransaction.java:301)
   at org.netbeans.modules.java.source.parsing.WriteBackTransaction.commit(WriteBackTransaction.java:293)
Caused: java.io.IOException: java.io.IOException
   at org.netbeans.modules.java.source.indexing.TransactionContext.commit(TransactionContext.java:103)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$Factory.scanFinished(JavaCustomIndexer.java:962)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFinished(RepositoryUpdater.java:2330)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:2901)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:3312)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:2997)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:5337)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4700(RepositoryUpdater.java:5017)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2$1.run(RepositoryUpdater.java:5262)
   at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:96)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:5258)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:5254)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:5254)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)