[
https://issues.apache.org/jira/browse/KAFKA-923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13669417#comment-13669417
]
Jun Rao commented on KAFKA-923:
-------------------------------
Thanks for patch v2. Looks good. +1.
> Improve controller failover latency
> -----------------------------------
>
> Key: KAFKA-923
> URL: https://issues.apache.org/jira/browse/KAFKA-923
> Project: Kafka
> Issue Type: Improvement
> Components: controller
> Affects Versions: 0.8
> Reporter: Neha Narkhede
> Assignee: Neha Narkhede
> Priority: Critical
> Labels: kafka-0.8
> Attachments: kafka-923-v1.patch, kafka-923-v2.patch
>
>
> During controller failover, we do the following things -
> 1. Increment controller epoch
> 2. Initialize controller context
> 3. Initialize replica state machine
> 4. Initialize partition state machine
> During step 2 above, we read the information of all topics and partitions,
> the replica assignments and leadership information. During step 3 and 4, we
> re-read some of this information from zookeeper. Since the zookeeper reads
> are proportional to the number of topics and the reads are serial, it is
> important to optimize this. The zookeeper reads in steps 3 and 4 are not
> required.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
