Github user ijokarumawak commented on the issue:
https://github.com/apache/nifi/pull/1527
@bbende Thanks for reviewing. Incorporated comment. While I was doing so, I
found that Kafka client library started supporting heartbeat in background
thread [KAFKA-3888](https://issues.apache.org/jira/browse/KAFKA-3888) since
0.10.1.0.
Maybe we should test the latest Kafka client, that may automatically solve
this issue without any modification on NiFi side, although I haven't looked at
the new client code yet. If it does, this PR will be purely for ConsumeKafka
(0.9).
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