[jira] [Commented] (KAFKA-1188) Stale LeaderAndIsr request could be handled by the broker on Controller failover

["Guozhang Wang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-1188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13852541#comment-13852541 ] 

Guozhang Wang commented on KAFKA-1188:
--------------------------------------

Created reviewboard https://reviews.apache.org/r/16360/
 against branch origin/trunk

> Stale LeaderAndIsr request could be handled by the broker on Controller failover
> --------------------------------------------------------------------------------
>
>                 Key: KAFKA-1188
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1188
>             Project: Kafka
>          Issue Type: Bug
>            Reporter: Guozhang Wang
>         Attachments: KAFKA-1188.patch
>
>
> ... which will cause the broker to truncate log as responding in makeFollower, and hence lose data. 
> One procedure to produce this issue:
> 3 brokers, 3 partitions, replication factor = 3.
> 1. Broker 1 is the original controller.
> 2. Broker 3 lost registration, 1 send LeaderAndIsr to 1 for isr shrinking  (leader of partition 1), but not to 2 since it is not the leader.
> 3. Broker 1 dies, new controller 2 sends all LeaderAndIsr to 2 and 3 (resumed), and 2 handles the makeFollower, truncates data.



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