[jira] Assigned: (HDFS-680) Add new access method to a copy of a block's replica

["Konstantin Boudnik (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-680?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Konstantin Boudnik reassigned HDFS-680:
---------------------------------------

    Assignee: Konstantin Shvachko  (was: Konstantin Boudnik)

Other Konstantin is working on this

> Add new access method to a copy of a block's replica
> ----------------------------------------------------
>
>                 Key: HDFS-680
>                 URL: https://issues.apache.org/jira/browse/HDFS-680
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 0.21.0
>            Reporter: Konstantin Boudnik
>            Assignee: Konstantin Shvachko
>             Fix For: 0.21.0
>
>         Attachments: replicaClone.patch
>
>
> Sometimes tests (and perhaps other client applications) might need an access to the state of a block's replica.
> Currently it is accessible through  {{FSDataset}} member of {{DataNode}} class. However, {{FSDataset}} is an internal matter of {{DataNode}} and shouldn't be available externally.
> This JIRA will provide new getter method which will be returning a copy of a block's replica instead of a reference to an actual replica. 

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