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https://issues.apache.org/jira/browse/KAFKA-234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14159766#comment-14159766
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Jun Rao commented on KAFKA-234:
-------------------------------
The reasoning is the following. A ZK follower can be up to zkSyncTime behind
the ZK leader. Since a ZK client can do reads from any ZK server, it's possible
for a rebalance to fail because one of the consumers reads stale data. Waiting
for at least zkSyncTime allows the ZK follower to have enough time to sync up
with its leader.
> Make backoff time during consumer rebalance configurable
> --------------------------------------------------------
>
> Key: KAFKA-234
> URL: https://issues.apache.org/jira/browse/KAFKA-234
> Project: Kafka
> Issue Type: Improvement
> Components: core
> Affects Versions: 0.7.1
> Reporter: Jun Rao
> Assignee: Jun Rao
> Fix For: 0.7.1
>
> Attachments: kafka-234.patch
>
>
> We need to make backoff time during consumer rebalance directly configurable,
> instead of relying on zkSyncTime.
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