zjffdu commented on issue #3290: [ZEPPELIN-3939] Spark 2.4 uses a more recent commons-lang3 than Zeppelin-0.8 URL: https://github.com/apache/zeppelin/pull/3290#issuecomment-457424007 Hi @maziyarpanahi don't worry about that, I also meet lots of problems when I first contribute to apache project. Here's the sample test code you can refer https://github.com/apache/zeppelin/blob/master/zeppelin-server/src/test/java/org/apache/zeppelin/rest/ZeppelinSparkClusterTest.java#L205 I believe you just need to write similar test code which use spark to read json or csv file. You can run this test in IDE, but it would take a long time to download the spark distribution for the first time, but it would be much fast for the following runs as the spark distributions are cached in local disk. You can first add the test in this PR, and then create another PR for master branch. Let me know if you have any other questions, I am willing to do any kind of help for that. And finally I am very appreciated your contribution.
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