[jira] [Created] (FLINK-4004) Do not pass custom flink kafka connector properties to Kafka to avoid warnings

[Shang Yuanchun (Jira)]

Robert Metzger created FLINK-4004:
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             Summary: Do not pass custom flink kafka connector properties to Kafka to avoid warnings
                 Key: FLINK-4004
                 URL: https://issues.apache.org/jira/browse/FLINK-4004
             Project: Flink
          Issue Type: Improvement
          Components: Kafka Connector
            Reporter: Robert Metzger


The FlinkKafkaConsumer has some custom properties, which we pass to the KafkaConsumer as well (such as {{flink.poll-timeout}}). This causes Kafka to log warnings about unused properties.

We should not pass Flink-internal properties to Kafka, to avoid those warnings.



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