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Posted to issues@flink.apache.org by "Fabian Hueske (JIRA)" <ji...@apache.org> on 2018/04/16 13:47:00 UTC
[jira] [Assigned] (FLINK-9183) Kafka consumer docs to warn about
idle partitions
[ https://issues.apache.org/jira/browse/FLINK-9183?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Fabian Hueske reassigned FLINK-9183:
------------------------------------
Assignee: Juho Autio
> 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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