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https://issues.apache.org/jira/browse/FLINK-20777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17255887#comment-17255887
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jiawen xiao commented on FLINK-20777:
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Actually,these scenarios are determined according to your production
environment.it is optional when you need.
You can first experiment to determine its impact on performance, when it is
turned on by default.
it need to judge whether this change is necessary.
> 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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