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https://issues.apache.org/jira/browse/HDFS-14167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16728202#comment-16728202
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Surendra Singh Lilhore commented on HDFS-14167:
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{quote}For the -1 issue we may want to start a new JIRA.
{quote}
No need, metrics is count for system status. It should not return -1. If
nothing is there just return 0.
Many system will use metrics to create graph and display the system status. Pls
check HDFS-8932, in exception case it will return default 0;
> RBF: Add stale nodes to federation metrics
> ------------------------------------------
>
> Key: HDFS-14167
> URL: https://issues.apache.org/jira/browse/HDFS-14167
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Íñigo Goiri
> Assignee: Íñigo Goiri
> Priority: Major
> Attachments: HDFS-14167-HDFS-13891.000.patch
>
>
> The federation metrics mimic the Namenode FSNamesystemState. However, the
> stale datanodes are not collected.
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