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https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brahma Reddy Battula updated HDFS-9038:
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Attachment: HDFS-9038.patch
Uploading the patch to makes nonDFSUsed accurate by considering
reservedForReplicas also.Actually bug is not there as mentioned in
description,Since reserved was already subtracted from total capacity,
nonDfsUsed was not including the reserved.
But getAvailable() value was calculated directly from DF, but there reserved
was not considered, which was fixed.
> Reserved space is erroneously counted towards non-DFS used.
> -----------------------------------------------------------
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 2.7.1
> Reporter: Chris Nauroth
> Assignee: Brahma Reddy Battula
> Attachments: HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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