LuceneIndexer is not working

[aslam bari]

Hello All,
  I am using slide2.1, and now want to attach lucene. I enable the
lucene in slide but indexes are not generated. Exceptions is coming
 while using LuceneIndexer.
   
  Does LuceneIndexer not work in Slide2.1. If not then how can i use Indexer to 
search resources?
  <ContentIndexer class="org.apache.slide.index.LuceneIndexer">
  ...........
  </ContentIndexer>
   
  Help Plz.


                                
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