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https://issues.apache.org/jira/browse/HDFS-8159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14499259#comment-14499259
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Jagadesh Kiran N commented on HDFS-8159:
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Thanks for the clarification Allen Wittenauer & Arpit Agarwal .
> [HDFS-Quota] Verification is not done while setting dir namequota and size
> --------------------------------------------------------------------------
>
> Key: HDFS-8159
> URL: https://issues.apache.org/jira/browse/HDFS-8159
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: HDFS
> Affects Versions: 2.6.0
> Environment: Suse 11 SP3
> Reporter: Jagadesh Kiran N
> Priority: Minor
>
> Name Quota and space quota is not verifying when setting a new value to a
> directory which already has subdirectories or contents.
> Below are the steps to re-produce the cases:
> *+Case-1+*
> Step-1) Create a New folder
> hdfs dfs -mkdir /test
> Step-2) Create sub folders
> hdfs dfs -mkdir /test/one
> hdfs dfs -mkdir /test/two
> hdfs dfs -mkdir /test/three
> Step-3) Set Name Quota as two
> hdfs dfsadmin -setQuota 2 /test
> Step-3) Quota will be set with out the validating the dirs
> +Output:+ Eventhough name quota value is lower than the existing number of
> dirs, its not validating and allowing to set the new value.
> +Suggestion:+ Validate the name quota against the number of contents before
> setting the new value.
> *+Case-2+*
> Step-1) Add any new folder or file , it will give error message
> mkdir: The NameSpace quota (directories and files) of directory /test is
> exceeded: quota=2 file count=5
> Step-2) Clear the Quota
> hdfs dfsadmin -clrQuota /test
> Step-3) Now Set the Size less than the folder size
> hdfs dfsadmin -setSpaceQuota 10 /test
> +Output:+ Eventhough space quota value is less than the size of the existing
> dir contents, its not validating and allowing to set the new value.
> +Suggestion:+ Validate the quota against the used space before setting the
> new value.
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