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https://issues.apache.org/jira/browse/KAFKA-7180?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dong Lin resolved KAFKA-7180.
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Resolution: Fixed
> In testHWCheckpointWithFailuresSingleLogSegment, wait until server1 has
> joined the ISR before shutting down server2
> -------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-7180
> URL: https://issues.apache.org/jira/browse/KAFKA-7180
> Project: Kafka
> Issue Type: Bug
> Reporter: Lucas Wang
> Assignee: Lucas Wang
> Priority: Minor
> Fix For: 2.1.0, 2.0.0
>
>
> In the testHWCheckpointWithFailuresSingleLogSegment method, the test logic is
> 1. shutdown server1 and then capture the leadership of a partition in the
> variable "leader", which should be server2
> 2. shutdown server2 and wait until the leadership has changed to a broker
> other than server2
> through the line
> waitUntilLeaderIsElectedOrChanged(zkClient, topic, partitionId, oldLeaderOpt
> = Some(leader))
> However when we execute step 2 and shutdown server2, it's possible that
> server1 has not caught up with the partition, and has not joined the ISR.
> With unclean leader election turned off, the leadership cannot be transferred
> to server1, causing the waited condition in step 2 to be never met.
> The obvious fix is to wait until server1 has joined the ISR before shutting
> down server2.
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