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https://issues.apache.org/jira/browse/HDFS-7833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14532064#comment-14532064
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Lei (Eddy) Xu commented on HDFS-7833:
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Thanks a lot for reviewing and committing this, [~cnauroth]!
> DataNode reconfiguration does not recalculate valid volumes required, based
> on configured failed volumes tolerated.
> -------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-7833
> URL: https://issues.apache.org/jira/browse/HDFS-7833
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 2.6.0
> Reporter: Chris Nauroth
> Assignee: Lei (Eddy) Xu
> Labels: BB2015-05-TBR
> Fix For: 2.8.0
>
> Attachments: HDFS-7833.000.patch, HDFS-7833.001.patch,
> HDFS-7833.002.patch, HDFS-7833.003.patch
>
>
> DataNode reconfiguration never recalculates
> {{FsDatasetImpl#validVolsRequired}}. This may cause incorrect behavior of
> the {{dfs.datanode.failed.volumes.tolerated}} property if reconfiguration
> causes the DataNode to run with a different total number of volumes.
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