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https://issues.apache.org/jira/browse/HADOOP-13840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Manoj Govindassamy updated HADOOP-13840:
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Attachment: HADOOP-13840.01.patch
Attached v0 patch to address the following
1. Made {{ViewFileSystem#getUsed()}} to throw an exception when the SlashRoot
is not supported or not configured.
2. Test to validate getUsed() returning same space usage numbers when accessed
via ViewFileSystem and the target FileSystem.
> 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
> Attachments: HADOOP-13840.01.patch
>
>
> 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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