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https://issues.apache.org/jira/browse/KAFKA-1188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13856426#comment-13856426
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Guozhang Wang commented on KAFKA-1188:
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Updated 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, KAFKA-1188_2013-12-24_11:07:12.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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