dkaznacheev opened a new pull request #3440: [ZEPPELIN-4323] Kotlin support for Spark interpreter URL: https://github.com/apache/zeppelin/pull/3440 ### What is this PR for? This PR aims to add **Kotlin** language support to Apache Zeppelin as a standalone interpreter as well as a part of Spark interpreter group. For added features and details, see Jira issue: https://issues.apache.org/jira/browse/ZEPPELIN-4323 Feel free to ask any questions, I will be happy to answer! ### What type of PR is it? Feature ### Todos [] - Add support for Spark versions older than 2.4 ### What is the Jira issue? https://issues.apache.org/jira/browse/ZEPPELIN-4323 ### How should this be tested? * Unit tests are added to standalone Kotlin interpreter and to Spark interpreter. * Manually test by building Zepppelin under profile `-Pspark2.4` and using `%kotlin` in standalone interpreter or `%spark.kotlin` in Spark interpreter ### Screenshots (if appropriate) <img width="1680" alt="Screenshot 2019-09-06 at 14 58 00" src="https://user-images.githubusercontent.com/12711194/64426911-85de2980-d0b8-11e9-8311-d050284bb509.png";> ### Questions: * Does the licenses files need update? No * Is there breaking changes for older versions? No * Does this needs documentation? Yes, and documentation is updated for Kotlin and Spark
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