Github user jtstorck commented on the issue:
https://github.com/apache/nifi/pull/1276
URL Connections aren't explicitly closed in these ElasticSearch processors.
It's outside the scope of this PR, since this issue existed prior to enabling
EL on these properties. The responses from the connections pull all the bytes
at once (and are implicitly closed), so it's technically OK at this point, but
I think explicit calls to close the connections should be added for cleanliness.
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