Github user bbonnin commented on the issue: https://github.com/apache/zeppelin/pull/1598 I have just one comment: it's about some duplicate lines of codes. I think some lines that we can find in both ElasticSearchXConnectors could be put in the base class, in order to keep only the specific part ES v2 and V5 in the sub-classes. An example is the method `executeDeleteQuery` that is almost the same in both classes. Otherwise, looks good to me.
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