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https://issues.apache.org/jira/browse/KAFKA-4443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jiangjie Qin resolved KAFKA-4443.
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Resolution: Fixed
> Controller should send UpdateMetadataRequest prior to LeaderAndIsrRequest
> during failover
> -----------------------------------------------------------------------------------------
>
> Key: KAFKA-4443
> URL: https://issues.apache.org/jira/browse/KAFKA-4443
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.10.1.0
> Reporter: Dong Lin
> Assignee: Dong Lin
> Labels: reliability
> Fix For: 0.10.1.1
>
>
> Currently in onControllerFailover(), controller will startup
> replicaStatemachine and partitionStateMachine before invoking
> sendUpdateMetadataRequest(controllerContext.liveOrShuttingDownBrokerIds.toSeq).
> However, if a broker right after controller election, the
> LeaderAndIsrRequest sent to follower partitions on this broker will all be
> ignored because broker doesn't know the leaders are alive.
> To fix this problem, in onControllerFailover(), controller should send
> UpdateMetadataRequest to brokers after initializeControllerContext() but
> before it starts replicaStatemachine and partitionStateMachine. The first
> MetadatUpdateRequest will include list of live broker. Although it will not
> include partition leader information, it is OK because we will always send
> MetadataUpdateRequest again when we send LeaderAndIsrRequest during
> replicaStateMachine.startup() and partitionStateMachine.startup().
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