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https://issues.apache.org/jira/browse/HDFS-10797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiao Chen updated HDFS-10797:
-----------------------------
Resolution: Fixed
Hadoop Flags: Reviewed
Fix Version/s: 3.0.0-alpha2
2.8.0
Status: Resolved (was: Patch Available)
Committed this to trunk, branch-2 and branch-2.8. Thanks Sean for the great
work here and Jing for the helpful reviews!
I think this is just a bug fix, and the change in {{du}} output is considered
incorrect previously. So not marking this incompatible.
[~mackrorysd], do you mind adding a short release note to the jira? Thanks
> Disk usage summary of snapshots causes renamed blocks to get counted twice
> --------------------------------------------------------------------------
>
> Key: HDFS-10797
> URL: https://issues.apache.org/jira/browse/HDFS-10797
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: snapshots
> Affects Versions: 2.8.0
> Reporter: Sean Mackrory
> Assignee: Sean Mackrory
> Fix For: 2.8.0, 3.0.0-alpha2
>
> Attachments: HDFS-10797.001.patch, HDFS-10797.002.patch,
> HDFS-10797.003.patch, HDFS-10797.004.patch, HDFS-10797.005.patch,
> HDFS-10797.006.patch, HDFS-10797.007.patch, HDFS-10797.008.patch,
> HDFS-10797.009.patch, HDFS-10797.010.patch, HDFS-10797.010.patch
>
>
> DirectoryWithSnapshotFeature.computeContentSummary4Snapshot calculates how
> much disk usage is used by a snapshot by tallying up the files in the
> snapshot that have since been deleted (that way it won't overlap with regular
> files whose disk usage is computed separately). However that is determined
> from a diff that shows moved (to Trash or otherwise) or renamed files as a
> deletion and a creation operation that may overlap with the list of blocks.
> Only the deletion operation is taken into consideration, and this causes
> those blocks to get represented twice in the disk usage tallying.
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