java.lang.OutOfMemoryError: GC overhead limit exceeded
   at java.util.HashMap.values(HashMap.java:1037)
   at org.apache.lucene.index.SegmentReader.doClose(SegmentReader.java:386)
   at org.apache.lucene.index.IndexReader.decRef(IndexReader.java:274)
   at org.apache.lucene.index.DirectoryReader.doClose(DirectoryReader.java:914)
   at org.apache.lucene.index.IndexReader.decRef(IndexReader.java:274)
   at org.apache.lucene.index.IndexReader.close(IndexReader.java:1479)
   at org.netbeans.modules.parsing.lucene.LuceneIndex$DirCache.doClose(LuceneIndex.java:792)
   at org.netbeans.modules.parsing.lucene.LuceneIndex$DirCache.close(LuceneIndex.java:772)
   at org.netbeans.modules.parsing.lucene.LuceneIndex$DirCache$CleanReference.run(LuceneIndex.java:1259)
   at org.openide.util.lookup.implspi.ActiveQueue$Daemon.run(ActiveQueue.java:191)