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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-680) Add new access method to a copy of a block's replica
Date Wed, 14 Oct 2009 05:28:31 GMT

    [ https://issues.apache.org/jira/browse/HDFS-680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12765403#action_12765403
] 

Konstantin Shvachko commented on HDFS-680:
------------------------------------------

test-core passed. test-patch has one javac warning. This is related to the use of now deprecated
getReplica() in BlockSender. HDFS-698 is supposed to fix that.
{noformat}
     [exec] There appear to be 108 release audit warnings before the patch and 108 release
audit warnings after applying the patch.
     [exec] -1 overall.  
     [exec]     +1 @author.  The patch does not contain any @author tags.
     [exec]     +1 tests included.  The patch appears to include 9 new or modified tests.
     [exec]     +1 javadoc.  The javadoc tool did not generate any warning messages.
     [exec]     -1 javac.  The applied patch generated 111 javac compiler warnings (more than
the trunk's current 110 warnings).
     [exec]     +1 findbugs.  The patch does not introduce any new Findbugs warnings.
     [exec]     +1 release audit.  The applied patch does not increase the total number of
release audit warnings.
     [exec] ======================================================================
     [exec] ======================================================================
     [exec]     Finished build.
     [exec] ======================================================================
     [exec] ======================================================================
{noformat}

> 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, 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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