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https://issues.apache.org/jira/browse/HDFS-14024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16663222#comment-16663222
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Íñigo Goiri commented on HDFS-14024:
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There is something done in TestRouterNamenodeHeartbeat but it doesn't really
check the JMX metrics.
Can you check how easy it is to add it?
If we can check the JMX object, it should be easy to test it with and without.
> RBF: ProvidedCapacityTotal json exception in NamenodeHeartbeatService
> ---------------------------------------------------------------------
>
> Key: HDFS-14024
> URL: https://issues.apache.org/jira/browse/HDFS-14024
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: CR Hota
> Assignee: CR Hota
> Priority: Major
> Attachments: HDFS-14024.0.patch
>
>
> Routers may be proxying for a downstream name node that is NOT migrated to
> understand "ProvidedCapacityTotal". updateJMXParameters method in
> NamenodeHeartbeatService should handle this without breaking.
>
> {code:java}
> jsonObject.getLong("MissingBlocks"),
> jsonObject.getLong("PendingReplicationBlocks"),
> jsonObject.getLong("UnderReplicatedBlocks"),
> jsonObject.getLong("PendingDeletionBlocks"),
> jsonObject.getLong("ProvidedCapacityTotal"));
> {code}
> One way to do this is create a json wrapper while gives back some default if
> json node is not found.
>
>
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