java.lang.OutOfMemoryError: Java heap space
   at org.apache.lucene.store.RAMFile.newBuffer(RAMFile.java:89)
   at org.apache.lucene.store.RAMFile.addBuffer(RAMFile.java:62)
   at org.apache.lucene.store.RAMOutputStream.switchCurrentBuffer(RAMOutputStream.java:132)
   at org.apache.lucene.store.RAMOutputStream.copyBytes(RAMOutputStream.java:171)
   at org.apache.lucene.store.SimpleFSDirectory$SimpleFSIndexInput.copyBytes(SimpleFSDirectory.java:179)
   at org.apache.lucene.store.Directory.copy(Directory.java:234)
   at org.apache.lucene.store.RAMDirectory.<init>(RAMDirectory.java:84)
   at org.apache.lucene.store.RAMDirectory.<init>(RAMDirectory.java:75)
   at org.netbeans.modules.parsing.lucene.LuceneIndex$DirCache.getReader(LuceneIndex.java:971)
   at org.netbeans.modules.parsing.lucene.LuceneIndex$DirCache.getStatus(LuceneIndex.java:836)
   at org.netbeans.modules.parsing.lucene.LuceneIndex.getStatus(LuceneIndex.java:513)
   at org.netbeans.modules.parsing.lucene.DocumentIndexImpl.getStatus(DocumentIndexImpl.java:172)
   at org.netbeans.modules.parsing.impl.indexing.lucene.LayeredDocumentIndex.getStatus(LayeredDocumentIndex.java:110)
   at org.netbeans.modules.parsing.spi.indexing.support.IndexingSupport.isValid(IndexingSupport.java:114)
   at org.netbeans.modules.csl.core.EmbeddingIndexerFactoryImpl.verifyIndex(EmbeddingIndexerFactoryImpl.java:126)
   at org.netbeans.modules.csl.core.EmbeddingIndexerFactoryImpl.scanStarted(EmbeddingIndexerFactoryImpl.java:71)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.embeddingIndexersScanStarted(RepositoryUpdater.java:2496)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanStarted(RepositoryUpdater.java:2401)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.call(RepositoryUpdater.java:3288)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.call(RepositoryUpdater.java:3256)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$4.run(RepositoryUpdater.java:2130)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:2126)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:2107)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.access$1200(RepositoryUpdater.java:157)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:3256)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:3775)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:3410)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:6174)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4300(RepositoryUpdater.java:5825)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2$1.run(RepositoryUpdater.java:6090)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)