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https://issues.apache.org/jira/browse/FLINK-20777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17255847#comment-17255847
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jiawen xiao commented on FLINK-20777:
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sorry [~renqs],i think this is not a problem. your can read code in
{{KafkaSourceBuilder}} .
The reason you will find "If the source is bounded, do not run periodic
partition discovery."
so it's a check for bounded streaming which can prevent users from enabling
dynamic partition discovery in the case of bounded sources.
> Default value of property "partition.discovery.interval.ms" is not as
> documented in new Kafka Source
> ----------------------------------------------------------------------------------------------------
>
> Key: FLINK-20777
> URL: https://issues.apache.org/jira/browse/FLINK-20777
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Kafka
> Reporter: Qingsheng Ren
> Priority: Major
> Fix For: 1.12.1
>
>
> The default value of property "partition.discovery.interval.ms" is documented
> as 30 seconds in {{KafkaSourceOptions}}, but it will be set as -1 in
> {{KafkaSourceBuilder}} if user doesn't pass in this property explicitly.
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