java.lang.OutOfMemoryError: Java heap space
   at java.util.Arrays.copyOf(Arrays.java:3326)
   at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:137)
   at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:121)
   at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:622)
   at java.lang.StringBuilder.append(StringBuilder.java:202)
   at java.io.UnixFileSystem.resolve(UnixFileSystem.java:108)
   at java.io.File.<init>(File.java:262)
   at java.io.File.listFiles(File.java:1212)
   at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$LazyFileList$It.hasNext(RepositoryUpdater.java:1739)
   at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker.updateFolder(RepositoryUpdater.java:1334)
   at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker.scanRoots(RepositoryUpdater.java:1132)
   at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker.access$1900(RepositoryUpdater.java:654)
   at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker$1.run(RepositoryUpdater.java:841)
   at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker$1.run(RepositoryUpdater.java:679)
   at org.netbeans.modules.gsfret.source.usages.ClassIndexManager.writeLock(ClassIndexManager.java:110)
   at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker.run(RepositoryUpdater.java:679)
   at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker.run(RepositoryUpdater.java:654)
   at org.netbeans.napi.gsfret.source.Source$CompilationJob.run(Source.java:1358)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
   at java.lang.Thread.run(Thread.java:745)