java Lucene索引已损坏

Question

我对lucene索引有一些问题。这在过去发生过，我重新索引了整个数据，现在又发生了

的确，那个文件在文件夹中丢失了，我不知道它是如何消失的。 是否有可能在不删除所有内容的情况下将索引恢复到较旧的状态？

Caused by: org.compass.core.engine.SearchEngineException: Failed to open Lucene reader/searcher; nested exception is org.compass.core.engine.SearchEngineException: Failed to open index searcher for sub-index [ctadoc]; nested exception is org.compass.core.engine.SearchEngineException: Failed to open sub index cache [ctadoc]; nested exception is java.io.FileNotFoundException: /fs/eudract/eudract_ps_index/index/ctadoc/_3npk.cfs (No such file or directory)

提前谢谢， 亲切的问候