Lucene.Net.Store.AlreadyClosedException: this Directory is closed 在 Lucene.Net.Store.Directory.EnsureOpen() 在 Lucene.Net.Store.FSDirectory.ListAll() 在 Lucene.Net.Index.SegmentInfos.FindSegmentsFile.Run(IndexCommit commit) 在 Lucene.Net.Index.DirectoryReader.Open(Directory directory, IndexDeletionPolicy deletionPolicy, IndexCommit commit, Boolean readOnly, Int32 termInfosIndexDivisor) 在 Lucene.Net.Index.IndexReader.Open(Directory directory, IndexDeletionPolicy deletionPolicy, IndexCommit commit, Boolean readOnly, Int32 termInfosIndexDivisor) 在 Lucene.Net.Index.IndexReader.Open(String path, Boolean readOnly) 在 index.search()