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https://issues.apache.org/jira/browse/KAFKA-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neha Narkhede updated KAFKA-1483:
---------------------------------
Labels: newbie++ (was: )
> Split Brain about Leader Partitions
> -----------------------------------
>
> Key: KAFKA-1483
> URL: https://issues.apache.org/jira/browse/KAFKA-1483
> Project: Kafka
> Issue Type: Improvement
> Reporter: Guozhang Wang
> Assignee: Jun Rao
> Labels: newbie++
> Fix For: 0.9.0
>
>
> Today in the server there are two places storing the leader partition info:
> 1) leaderPartitions list in the ReplicaManager.
> 2) leaderBrokerIdOpt in the Partition.
> 1) is used as the ground truth to decide if the server is the current leader
> for serving requests; 2) is used as the ground truth for reporting leader
> counts metrics, etc and for the background Shrinking-ISR thread to decide
> which partition to check. There is a risk that these two ground truth caches
> are not consistent, and we'd better only make one of them as the ground truth.
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