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From "Neha Narkhede (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-1170) ISR can be inconsistent during partition reassignment for low throughput partitions
Date Sat, 07 Dec 2013 00:22:41 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-1170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13841936#comment-13841936
] 

Neha Narkhede commented on KAFKA-1170:
--------------------------------------

Updated reviewboard https://reviews.apache.org/r/16095/
 against branch trunk

> ISR can be inconsistent during partition reassignment for low throughput partitions
> -----------------------------------------------------------------------------------
>
>                 Key: KAFKA-1170
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1170
>             Project: Kafka
>          Issue Type: Bug
>          Components: controller
>    Affects Versions: 0.8.1
>            Reporter: Neha Narkhede
>            Assignee: Neha Narkhede
>            Priority: Critical
>         Attachments: KAFKA-1170.patch, KAFKA-1170_2013-12-06_16:22:00.patch
>
>
> During reassignment of partitions, if the reassigned replicas already has the current
leader, then the ISR of the partition can have the old replicas. This is particularly true
for partitions that don't have further incoming data, since the leader does not remove replicas
that have stopped sending fetch requests from the ISR if their log end offsets match (no more
data comes in).



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