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https://issues.apache.org/jira/browse/HDFS-4773?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo (Nicholas), SZE updated HDFS-4773:
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Hadoop Flags: Reviewed
+1 patch looks good.
> Fix bugs in quota usage updating/computation
> --------------------------------------------
>
> Key: HDFS-4773
> URL: https://issues.apache.org/jira/browse/HDFS-4773
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Attachments: HDFS-4773.001.patch, HDFS-4773.002.patch,
> HDFS-4773.003.patch
>
>
> 1. FileWithSnapshot#updateQuotaAndCollectBlocks did not consider the scenario
> that all the snapshots has been deleted from a snapshot copy of deleted file.
> This may lead to a divide-by-0 error.
> 2. When computing the quota usage for a WithName node and its subtree, if the
> snapshot associated with the WithName node at the time of rename operation
> has been deleted, we should compute the quota based on the posterior snapshot.
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