[jira] [Updated] (HDFS-11847) Enhance dfsadmin listOpenFiles command to list files blocking datanode decommissioning

["Manoj Govindassamy (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-11847?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Manoj Govindassamy updated HDFS-11847:
--------------------------------------
    Attachment: HDFS-11847.01.patch

Attached v01 patch to address the following:
1. Ability to query for open files with interested types - like BLOCKING_DECOMMISSION, BLOCKING_DECOMMISSION, ALL, etc.,
2. A new method FSNamesystem#getFilesBlockingDecom() to get the list of all open files blocking deocmmissiom
3. Basic tests. More sophisticated tests pending.

> Enhance dfsadmin listOpenFiles command to list files blocking datanode decommissioning
> --------------------------------------------------------------------------------------
>
>                 Key: HDFS-11847
>                 URL: https://issues.apache.org/jira/browse/HDFS-11847
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Manoj Govindassamy
>            Assignee: Manoj Govindassamy
>         Attachments: HDFS-11847.01.patch
>
>
> HDFS-10480 adds {{listOpenFiles}} option is to {{dfsadmin}} command to list all the open files in the system.
> Additionally, it would be very useful to only list open files that are blocking the DataNode decommissioning. With thousand+ node clusters, where there might be machines added and removed regularly for maintenance, any option to monitor and debug decommissioning status is very helpful. Proposal here is to add suboptions to {{listOpenFiles}} for the above case.



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