java.lang.NullPointerException at org.apache.maven.index.context.DefaultIndexingContext.releaseIndexSearcher(DefaultIndexingContext.java:509) at org.apache.maven.index.context.DefaultIndexingContext.merge(DefaultIndexingContext.java:698) at org.apache.maven.index.context.DefaultIndexingContext.merge(DefaultIndexingContext.java:622) at org.apache.maven.index.updater.DefaultIndexUpdater.loadIndexDirectory(DefaultIndexUpdater.java:214) at org.apache.maven.index.updater.DefaultIndexUpdater.access$300(DefaultIndexUpdater.java:76) at org.apache.maven.index.updater.DefaultIndexUpdater$LuceneIndexAdaptor.addIndexChunk(DefaultIndexUpdater.java:636) at org.apache.maven.index.updater.DefaultIndexUpdater.fetchAndUpdateIndex(DefaultIndexUpdater.java:829) at org.apache.maven.index.updater.DefaultIndexUpdater.fetchAndUpdateIndex(DefaultIndexUpdater.java:157) at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.indexLoadedRepo(NexusRepositoryIndexerImpl.java:451) at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.access$200(NexusRepositoryIndexerImpl.java:112) at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$3.run(NexusRepositoryIndexerImpl.java:518) at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$3.run(NexusRepositoryIndexerImpl.java:512) at org.openide.util.Mutex.writeAccess(Mutex.java:399) at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.indexRepo(NexusRepositoryIndexerImpl.java:512) at org.netbeans.modules.maven.indexer.api.RepositoryIndexer.indexRepo(RepositoryIndexer.java:58) at org.netbeans.modules.maven.ProjectOpenedHookImpl$2.run(ProjectOpenedHookImpl.java:229) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2048)