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https://issues.apache.org/jira/browse/HDFS-12772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16334979#comment-16334979
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Íñigo Goiri commented on HDFS-12772:
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[~hanishakoneru], [~linyiqun], at the end I went ahead and split this in 4:
* HDFS-12772 for storing the Router state in the State Store
* HDFS-13042 for the Router to heartbeat its state to the State Store
* HDFS-13043 to expose this in the federation UI
* HDFS-13044 to add a new safe mode
[~linyiqun] thanks for the review, I fixed most in [^HDFS-12772.003.patch],
leaving a couple open points:
* {{getRouterRegistration()}} is to get the registration for a particular
Router while {{getRouterRegistrations()}} gets all of them. As we use the
Request/Reponse interface this is not as clear but I think it should be clear
enough with: {{RouterState getRouterRegistration(String routerId)}} and
{{List<RouterState> getRouterRegistrations()}}
* For the timestamp, the single one doesn't have the timestamp of the query as
it's a particular entity that we query. I could remove the timestamp from the
{{getRouterRegistrations()}}.
> RBF: Federation Router State State Store internal API
> -----------------------------------------------------
>
> Key: HDFS-12772
> URL: https://issues.apache.org/jira/browse/HDFS-12772
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: 3.0.0
> Reporter: Íñigo Goiri
> Assignee: Íñigo Goiri
> Priority: Major
> Attachments: HDFS-12772.000.patch, HDFS-12772.001.patch,
> HDFS-12772.002.patch, HDFS-12772.003.patch
>
>
> To monitor the state of the cluster, we should track the state of the
> routers. This should be exposed in the UI.
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