Fengnan Li created HDFS-15554:
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Summary: 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
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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