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https://issues.apache.org/jira/browse/HDFS-13286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16412217#comment-16412217
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Chao Sun commented on HDFS-13286:
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Just started to look into this. Originally I was thinking to add this to
{{haadmin}} command, similar to:
{code}
haadmin -transitionToStandby
{code}
However, this requires changing the {{HAServiceProtocol}}, which is shared with
other Hadoop components such as Yarn. Therefore, it may not be a good idea to
do it there.
Another option is to add this command to {{dfsadmin}} and HDFS
{{ClientProtocol}}. [~shv]: do you think this is OK?
> Add haadmin commands to transition between standby and observer
> ---------------------------------------------------------------
>
> Key: HDFS-13286
> URL: https://issues.apache.org/jira/browse/HDFS-13286
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Chao Sun
> Assignee: Chao Sun
> Priority: Major
>
> As discussed in HDFS-12975, we should allow explicit transition between
> standby and observer through haadmin command, such as:
> {code}
> haadmin -transitionToObserver
> {code}
> Initially we should support transition from observer to standby, and standby
> to observer.
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