org.netbeans.modules.parsing.lucene.support.Index$IndexClosedException
   at org.netbeans.modules.parsing.lucene.LuceneIndex$DirCache.checkPreconditions(LuceneIndex.java:1005)
   at org.netbeans.modules.parsing.lucene.LuceneIndex$DirCache.getReader(LuceneIndex.java:890)
   at org.netbeans.modules.parsing.lucene.LuceneIndex$DirCache.acquireReader(LuceneIndex.java:872)
   at org.netbeans.modules.parsing.lucene.LuceneIndex.query(LuceneIndex.java:161)
   at org.netbeans.modules.parsing.lucene.DocumentIndexImpl.query(DocumentIndexImpl.java:226)
   at org.netbeans.modules.parsing.impl.indexing.lucene.LayeredDocumentIndex.query(LayeredDocumentIndex.java:131)
   at org.netbeans.modules.parsing.spi.indexing.support.QuerySupport$1.call(QuerySupport.java:294)
   at org.netbeans.modules.parsing.spi.indexing.support.QuerySupport$1.call(QuerySupport.java:254)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.spi.indexing.support.QuerySupport.query(QuerySupport.java:254)
   at org.netbeans.modules.spring.beans.index.SpringIndex.getAllSpringLibraryDescriptors(SpringIndex.java:77)
   at org.netbeans.modules.spring.beans.completion.OpenTagCompletionProvider.getModels(OpenTagCompletionProvider.java:116)
   at org.netbeans.modules.xml.schema.completion.util.CompletionContextImpl.initModels(CompletionContextImpl.java:913)
   at org.netbeans.modules.xml.schema.completion.CompletionQuery.getCompletionItems(CompletionQuery.java:356)
   at org.netbeans.modules.xml.schema.completion.CompletionQuery$ModelTask.run(CompletionQuery.java:326)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)