java.lang.NullPointerException
   at org.apache.maven.index.context.DefaultIndexingContext.acquireIndexSearcher(DefaultIndexingContext.java:498)
   at org.apache.maven.index.context.NexusIndexMultiReader.acquire(NexusIndexMultiReader.java:56)
   at org.apache.maven.index.context.NexusIndexMultiSearcher.<init>(NexusIndexMultiSearcher.java:32)
   at org.apache.maven.index.DefaultSearchEngine.searchIteratorPaged(DefaultSearchEngine.java:276)
   at org.apache.maven.index.DefaultSearchEngine.searchIteratorPaged(DefaultSearchEngine.java:257)
   at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.repeatedPagedSearch(NexusRepositoryIndexerImpl.java:354)
   at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.access$1500(NexusRepositoryIndexerImpl.java:112)
   at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$18.run(NexusRepositoryIndexerImpl.java:924)
   at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$7.run(NexusRepositoryIndexerImpl.java:723)
   at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$7.run(NexusRepositoryIndexerImpl.java:707)
   at org.openide.util.Mutex.writeAccess(Mutex.java:399)
   at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.iterate(NexusRepositoryIndexerImpl.java:707)
   at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.findVersionsByClass(NexusRepositoryIndexerImpl.java:919)
   at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.findVersionsByClass(NexusRepositoryIndexerImpl.java:913)
   at org.netbeans.modules.maven.indexer.api.RepositoryQueries.findVersionsByClassResult(RepositoryQueries.java:411)
   at org.netbeans.modules.maven.hints.ui.SearchDependencyUI$Tsk.run(SearchDependencyUI.java:210)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2044)