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https://issues.apache.org/jira/browse/KAFKA-4443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15694806#comment-15694806
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ASF GitHub Bot commented on KAFKA-4443:
---------------------------------------
GitHub user lindong28 opened a pull request:
https://github.com/apache/kafka/pull/2168
KAFKA-4443; Controller should send UpdateMetadataRequest prior to
LeaderAndIsrRequest during failover
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/lindong28/kafka KAFKA-4443
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/2168.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2168
----
commit 4db70c9e9960c688932dda8d942ee2fedc459e1e
Author: Dong Lin <[email protected]>
Date: 2016-11-25T04:21:50Z
KAFKA-4443; Controller should send UpdateMetadataRequest prior to
LeaderAndIsrRequest during failover
----
> 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
> Reporter: Dong Lin
> Assignee: Dong Lin
>
> 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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