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https://issues.apache.org/jira/browse/HDFS-3518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13292151#comment-13292151
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Aaron T. Myers commented on HDFS-3518:
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@Bikas - my question was more along the lines of what "operational state"
you're looking for here. Is the NN up? Is the NN in safe mode? Is the NN
"Active" in the HA sense? Something else?
> Provide API to check HDFS operational state
> -------------------------------------------
>
> Key: HDFS-3518
> URL: https://issues.apache.org/jira/browse/HDFS-3518
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs client
> Reporter: Bikas Saha
> Assignee: Tsz Wo (Nicholas), SZE
>
> This will improve the usability of JobTracker safe mode.
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