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https://issues.apache.org/jira/browse/HDFS-15023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16985002#comment-16985002
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Ayush Saxena commented on HDFS-15023:
-------------------------------------
Give a check to the failed test too in the last build, never saw it failing and
is related to ZKFC too. Ensure it isn't related nor does this change make that
flaky.
> [SBN read] ZKFC should check the state before joining the election
> ------------------------------------------------------------------
>
> Key: HDFS-15023
> URL: https://issues.apache.org/jira/browse/HDFS-15023
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Fei Hui
> Assignee: Fei Hui
> Priority: Major
> Attachments: HDFS-15023.001.patch
>
>
> As discussed HDFS-14961, ZKFC should not join election when its state is
> observer.
> Right now when namemode was an observer, it joined election and it would be
> become a standby.
> MonitorDaemon thread callchain is that
> doHealthChecks -> enterState(State.SERVICE_HEALTHY) -> recheckElectability()
> -> elector.joinElection(targetToData(localTarget)) -> joinElectionInternal ->
> createLockNodeAsync
> callBack for zookeeper
> processResult -> becomeStandby
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