Github user JPercivall commented on the issue:
https://github.com/apache/nifi/pull/576
There have already been comments asking for a multi-get function for
ElasticSearch[1] could this be added to FetchElasticSearchHTTP now and be added
as a new feature to PutElasticSearch later (Create a Jira for it)?
[1]
https://community.hortonworks.com/questions/41951/how-to-get-all-values-with-expression-language-in.html
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