HeartSaVioR commented on issue #25135: [SPARK-28367][SS] Use new KafkaConsumer.poll API in Kafka connector URL: https://github.com/apache/spark/pull/25135#issuecomment-512718254 It feels me like `consumer.poll(jt.Duration.ZERO)` just doesn't work. Maybe it's only me, but I'm not sure I understand why there's no alternative being proposed on widely used patterns. If we can't use `consumer.poll(jt.Duration.ZERO)` to avoid the unnecessary wait where record to pull is not available, I feel Kafka should have separate public API on explicitly saying "no record" but interested on others like metadata.
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