Brandon Li created HDFS-5712:
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Summary: ViewFS should check the existence of the mapped namespace
directories in the mount table
Key: HDFS-5712
URL: https://issues.apache.org/jira/browse/HDFS-5712
Project: Hadoop HDFS
Issue Type: Bug
Components: federation
Affects Versions: 3.0.0
Reporter: Brandon Li
ViewFS doesn't validate the mount table mapping. Even the mapped directory on
NameNode doesn't exist, list directories or "dfs -ls" command can still show
the mapped directory.
This confuses users and applications when they try to create files under the
mapped directories. They will get file-not-exist error but viewfs shows the
directory exists.
It would be less misleading if ViewFS can validate the mount table and report
found errors.
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