Lucene索引已损坏

Question

我的Lucene索引存在一些问题。过去发生过这种情况，我重新索引了整个数据，然后又发生了。

确实该文件在文件夹中丢失，我不知道它是如何消失的。 是否可以在不删除所有内容的情况下将索引恢复到较早的状态？

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)

预先感谢， 问候