zjffdu opened a new pull request #3992:
URL: https://github.com/apache/zeppelin/pull/3992


   ### What is this PR for?
   
   There's many unnecessary indexing in LuceneSearch which cause performance 
issue when there' lots of jobs running in zeppelin. This PR is to fix it.
   * Only index the current paragraph when paragraph is updated.( All the 
paragraphs will be indexed 
   * Only index/update note name index when note is updated.
   
   ### What type of PR is it?
   [Bug Fix]
   
   ### Todos
   * [ ] - Task
   
   ### What is the Jira issue?
   * https://issues.apache.org/jira/browse/ZEPPELIN-5153
   
   ### How should this be tested?
   * Manually tesed
   
   ### Screenshots (if appropriate)
   
   ### Questions: 
   * Does the licenses files need update? No
   * Is there breaking changes for older versions? No
   * Does this needs documentation? No
   


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