Tzu-Li (Gordon) Tai created FLINK-5018:
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Summary: User configurable source idle timeout to work with
WatermarkStatus emitting
Key: FLINK-5018
URL: https://issues.apache.org/jira/browse/FLINK-5018
Project: Flink
Issue Type: Sub-task
Components: Streaming
Reporter: Tzu-Li (Gordon) Tai
There are 2 cases where sources are considered idle and should emit an idle
{{WatermarkStatus}} downstream, taking Kafka consumer as example:
- The source instance was not assigned any partitions
- The source instance was assigned partitions, but they currently don't have
any data.
For the second case, we can only consider it idle after a timeout threshold. It
would be good to make this timeout user configurable besides a default value.
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