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https://issues.apache.org/jira/browse/HDFS-15554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fengnan Li updated HDFS-15554:
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Status: Patch Available (was: Open)
> RBF: force router check file existence before adding/updating mount points
> --------------------------------------------------------------------------
>
> Key: HDFS-15554
> URL: https://issues.apache.org/jira/browse/HDFS-15554
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Fengnan Li
> Assignee: Fengnan Li
> Priority: Minor
>
> Adding/Updating mount points right now is only a router action without
> validation in the downstream namenodes for the destination files/directories.
> In practice we have set up the dangling mount points and when clients call
> listStatus they would get the file returned, but then if they try to access
> the file FileNotFoundException would be thrown out.
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