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From "Manoj Govindassamy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-13840) Implement getUsed() for ViewFileSystem
Date Tue, 29 Nov 2016 02:08:58 GMT
Manoj Govindassamy created HADOOP-13840:
-------------------------------------------

             Summary: Implement getUsed() for ViewFileSystem
                 Key: HADOOP-13840
                 URL: https://issues.apache.org/jira/browse/HADOOP-13840
             Project: Hadoop Common
          Issue Type: Task
          Components: viewfs
    Affects Versions: 3.0.0-alpha1
            Reporter: Manoj Govindassamy
            Assignee: Manoj Govindassamy


ViewFileSystem doesn't override {{FileSystem#getUSed()}. So, when file system used space is
queried for slash root "/" paths, the default implementations tries to run the {{getContentSummary}}
which crashes on seeing unexpected mount points under slash. 

ViewFileSystem#getUsed() is not expected to collate all the space used from all the mount
points configured under "/". Proposal is to avoid invoking FileSystem#getUsed() and throw
NotInMountPointException until LinkMergeSlash is supported.



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