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Posted to issues@flink.apache.org by "Tzu-Li (Gordon) Tai (JIRA)" <ji...@apache.org> on 2017/07/31 09:49:00 UTC

[jira] [Closed] (FLINK-4789) Avoid Kafka partition discovery on restore and share consumer instance for discovery and data consumption

     [ https://issues.apache.org/jira/browse/FLINK-4789?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tzu-Li (Gordon) Tai closed FLINK-4789.
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    Resolution: Won't Fix

> Avoid Kafka partition discovery on restore and share consumer instance for discovery and data consumption
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-4789
>                 URL: https://issues.apache.org/jira/browse/FLINK-4789
>             Project: Flink
>          Issue Type: Improvement
>          Components: Kafka Connector
>    Affects Versions: 1.2.0
>            Reporter: Robert Metzger
>
> As part of FLINK-4379, the Kafka partition discovery was moved from the Constructor to the open() method. This is in general a good change, as outlined in FLINK-4155, as it allows us to detect new partitions and topics based on regex on the fly.
> However, currently the partitions are discovered on restore as well. 
> Also, the {{FlinkKafkaConsumer09.getKafkaPartitions()}} is creating a separate {{KafkaConsumer}} just for the partition discovery.
> Since the partition discovery happens on the task managers now, we can use the regular {{KafkaConsumer}} instance, which is used for data retrieval as well.



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