Details
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Improvement
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Status: Closed
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Major
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Resolution: Fixed
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None
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None
Description
Similar to what's happening to idle sources blocking watermark progression in downstream operators (see FLINK-5017), the per-partition watermark mechanism in FlinkKafkaConsumer is also being blocked of progressing watermarks when a partition is idle. The watermark of idle partitions is always Long.MIN_VALUE, therefore the overall min watermark across all partitions of a consumer subtask will never proceed.
It's normally not a common case to have Kafka partitions not producing any data, but it'll probably be good to handle this as well. I think we should have a localized solution similar to FLINK-5017 for the per-partition watermarks in AbstractFetcher.
Attachments
Issue Links
- is related to
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FLINK-8001 Mark Kafka Consumer as idle if it doesn't have partitions
- Closed
- links to
1.
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Kafka consumer docs to warn about idle partitions | Closed | Juho Autio | |
2.
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Remove warning from kafka consumer docs | Open | Unassigned |