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https://issues.apache.org/jira/browse/HDFS-14130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16723435#comment-16723435
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Konstantin Shvachko commented on HDFS-14130:
--------------------------------------------

There is no contradiction. It's just stages. In this jira we want to make ZKFC 
do failover to SBN just as it does without Observers. With this fix Observers 
will not be used for failover. They can become failover targets when Observer 
is transitioned (say manually) to Standby.
The goal for HDFS-13182 is to go further and make it possible to failover 
directly to Observer. It will still have to transition to Standby in the 
process, but it will happen automatically.
Hope this makes sense.

> Make ZKFC ObserverNode aware
> ----------------------------
>
>                 Key: HDFS-14130
>                 URL: https://issues.apache.org/jira/browse/HDFS-14130
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha
>    Affects Versions: HDFS-12943
>            Reporter: Konstantin Shvachko
>            Priority: Major
>
> Need to fix automatic failover with ZKFC. Currently it does not know about 
> ObserverNodes trying to convert them to SBNs.



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