Gunnar Morling created FLINK-32307:
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Summary: Incorrect docs for default behavior of
"scan.startup.mode" option
Key: FLINK-32307
URL: https://issues.apache.org/jira/browse/FLINK-32307
Project: Flink
Issue Type: Technical Debt
Components: Connectors / Kafka
Reporter: Gunnar Morling
The [Kafka connector
docs|https://nightlies.apache.org/flink/flink-docs-master/docs/connectors/table/kafka/#start-reading-position]
say this in regards to the {{scan.startup.mode}} option:
{quote}
The default option value is group-offsets which indicates to consume from last
committed offsets in ZK / Kafka brokers.
{quote}
Whereas what I actually observe is that the "earliest-offset" mode is used when
not specifying a value for this option. This matches the implementation in
[{{KafkaSourceBuilder}}|https://github.com/apache/flink/blob/master/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/connector/kafka/source/KafkaSourceBuilder.java#L106]
from a quick glimpse.
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