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https://issues.apache.org/jira/browse/FLINK-9183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16439700#comment-16439700
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ASF GitHub Bot commented on FLINK-9183:
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Github user fhueske commented on the issue:
https://github.com/apache/flink/pull/5858
I'll merge it on `master`, `release-1.5` and `release-1.4`
> Kafka consumer docs to warn about idle partitions
> -------------------------------------------------
>
> Key: FLINK-9183
> URL: https://issues.apache.org/jira/browse/FLINK-9183
> Project: Flink
> Issue Type: Sub-task
> Reporter: Juho Autio
> Assignee: Juho Autio
> Priority: Major
>
> Looks like the bug FLINK-5479 is entirely preventing
> FlinkKafkaConsumerBase#assignTimestampsAndWatermarks to be used if there are
> any idle partitions. It would be nice to mention in documentation that
> currently this requires all subscribed partitions to have a constant stream
> of data with growing timestamps. When watermark gets stalled on an idle
> partition it blocks everything.
>
> Link to current documentation:
> [https://ci.apache.org/projects/flink/flink-docs-master/dev/connectors/kafka.html#kafka-consumers-and-timestamp-extractionwatermark-emission]
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