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Kafka >> mail # dev >> [jira] [Commented] (KAFKA-1087) Empty topic list causes consumer to fetch metadata of all topics


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[jira] [Commented] (KAFKA-1087) Empty topic list causes consumer to fetch metadata of all topics

    [ https://issues.apache.org/jira/browse/KAFKA-1087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13794800#comment-13794800 ]

Neha Narkhede commented on KAFKA-1087:
--------------------------------------

Good catch, +1 !

> Empty topic list causes consumer to fetch metadata of all topics
> ----------------------------------------------------------------
>
>                 Key: KAFKA-1087
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1087
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.8
>            Reporter: Swapnil Ghike
>            Assignee: Swapnil Ghike
>         Attachments: KAFKA-1087.patch
>
>
> The ClientUtils fetches metadata for all topics if the topic set is empty.
> If the topic list of a consumer is empty, the following happens if a rebalance is triggered:
> - The fetcher is restarted, fetcher.startConnections() starts a LeaderFinderThread
> - LeaderFinderThread waits on a condition
> - fetcher.startConnections() signals the aforementioned condition
> - LeaderFinderThread obtains metadata for all topics since the topic list is empty.

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+
Swapnil Ghike 2013-10-15, 07:43