Fang Yong created FLINK-6352:
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Summary: FlinkKafkaConsumer should support to use timestamp to set
up start offset
Key: FLINK-6352
URL: https://issues.apache.org/jira/browse/FLINK-6352
Project: Flink
Issue Type: Improvement
Components: Kafka Connector
Reporter: Fang Yong
Fix For: 1.3.0
Currently "auto.offset.reset" is used to initialize the start offset of
FlinkKafkaConsumer, and the value should be earliest/latest/none. This method
can only let the job comsume the beginning or the most recent data, but can not
specify the specific offset of Kafka began to consume.
So, there should be a configuration item (such as "flink.kafka.start.time"
and the format is "yyyy-MM-dd HH:mm:ss") that allows user to configure the
initial offset of Kafka. The action of "flink.kafka.start.time" is as follows:
1) job start from checkpoint / savepoint
a> offset of partition can be restored from checkpoint/savepoint,
"flink.kafka.start.time" will be ignored.
b> there's no checkpoint/savepoint for the partition (For example, this
partition is newly increased), the "flink.kafka.start.time" will be used to
initialize the offset of the partition
2) job has no checkpoint / savepoint, the "flink.kafka.start.time" is used to
initialize the offset of the kafka
a> the "flink.kafka.start.time" is valid, use it to set the offset of kafka
b> the "flink.kafka.start.time" is out-of-range, the same as it does
currently with no initial offset, get kafka's current offset and start reading
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