Tzu-Li (Gordon) Tai created FLINK-6607:
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Summary: Confusing statement in docs that Kafka 010 consumer does
not require timestamp extractors
Key: FLINK-6607
URL: https://issues.apache.org/jira/browse/FLINK-6607
Project: Flink
Issue Type: Improvement
Components: Documentation, Kafka Connector
Reporter: Tzu-Li (Gordon) Tai
In
https://ci.apache.org/projects/flink/flink-docs-release-1.2/dev/connectors/kafka.html#using-kafka-timestamps-and-flink-event-time-in-kafka-010,
the docs state that the Kafka 010 consumer does not require timestamp
extractors because the Kafka records' timestamps can be used.
While this is true, it is confusing for the Kafka 010 consumer because
currently timestamp extraction and watermark generating is bound to a single
`AssignerWithXXXWatermarks` interface. This may cause users to misunderstand
that even watermark generating isn't required also.
We perhaps should strengthen the clarification of this a bit more in that part
of the docs to avoid confusion.
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