Github user cjolif commented on the issue:
https://github.com/apache/flink/pull/6043
> @cjolif do you think it would be possible that with a clean cut using a
REST implementation, we no longer need to have separate modules anymore for ES
6.x, 7.x, 8.x or so on?
i.e., it would only be a matter for the user of recompiling that REST-based
implementation with a different ES client version.
@tzulitai I guess, in theory, there is alway a risk Elasticsearch breaks
the compatibility between two major versions again even on the High Level REST
Client APIs... My feeling is they are now trying to avoid that. But I did not
find any wording that would allow us to "rely" on that "for sure".
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