[jira] [Updated] (HDFS-7719) BlockPoolSliceStorage could not remove storageDir.

["Lei (Eddy) Xu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-7719?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lei (Eddy) Xu updated HDFS-7719:
--------------------------------
    Attachment: HDFS-7719.000.patch

This patch checks the targeted directories are parent directories in {{BlockPoolSliceStorage#removeVolumes}}. A test is added to enforce the behavior.


> BlockPoolSliceStorage could not remove storageDir.
> --------------------------------------------------
>
>                 Key: HDFS-7719
>                 URL: https://issues.apache.org/jira/browse/HDFS-7719
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.6.0
>            Reporter: Lei (Eddy) Xu
>            Assignee: Lei (Eddy) Xu
>         Attachments: HDFS-7719.000.patch
>
>
> The parameter of {{BlockPoolSliceStorage#removeVolumes()}} is a set of volume level directories, thus {{BlockPoolSliceStorage}} could not directly compare its own {{StorageDirs}} with this volume-level directory. The result of that is {{BlockPoolSliceStorage}} did not actually remove the targeted {{StorageDirectory}}. 
> It will cause failure when remove a volume and then immediately add a volume back with the same mount point..



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