zjffdu opened a new pull request #3341: ZEPPELIN-4038. Deprecate spark 2.2 and earlier URL: https://github.com/apache/zeppelin/pull/3341 ### What is this PR for? This PR is to deprecate spark 2.2 and earlier. It would display a warning message in frontend, and user can disable this message by configure `zeppelin.spark.deprecatedMsg.show` to false, by default it is true. ### What type of PR is it? [Bug Fix] ### Todos * [ ] - Task ### What is the Jira issue? * https://jira.apache.org/jira/browse/ZEPPELIN-4038 ### How should this be tested? * CI pass ### Screenshots (if appropriate) ![image](https://user-images.githubusercontent.com/164491/54910937-4ebff580-4f28-11e9-8bdf-a4327f814990.png) ### Questions: * Does the licenses files need update? * Is there breaking changes for older versions? * Does this needs documentation?
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