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From "Guozhang Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-2017) Persist Coordinator State for Coordinator Failover
Date Mon, 12 Oct 2015 20:31:05 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-2017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14953683#comment-14953683
] 

Guozhang Wang commented on KAFKA-2017:
--------------------------------------

[~junrao] I agree this should be in 0.9.0 release, could you take a look at the current patch's
ZK format then?

> Persist Coordinator State for Coordinator Failover
> --------------------------------------------------
>
>                 Key: KAFKA-2017
>                 URL: https://issues.apache.org/jira/browse/KAFKA-2017
>             Project: Kafka
>          Issue Type: Sub-task
>          Components: consumer
>    Affects Versions: 0.9.0.0
>            Reporter: Onur Karaman
>            Assignee: Guozhang Wang
>             Fix For: 0.9.0.0
>
>         Attachments: KAFKA-2017.patch, KAFKA-2017_2015-05-20_09:13:39.patch, KAFKA-2017_2015-05-21_19:02:47.patch
>
>
> When a coordinator fails, the group membership protocol tries to failover to a new coordinator
without forcing all the consumers rejoin their groups. This is possible if the coordinator
persists its state so that the state can be transferred during coordinator failover. This
state consists of most of the information in GroupRegistry and ConsumerRegistry.



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