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Date: Wed, 30 Nov 2016 11:47:59 +0000 (UTC)
From: "Steve Loughran (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12709472.1398027265000.400194.1480506479727@Atlassian.JIRA>
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References: <JIRA.12709472.1398027265000@Atlassian.JIRA> <JIRA.12709472.1398027265324@arcas>
Subject: [jira] [Commented] (HDFS-6262) HDFS doesn't raise
 FileNotFoundException if the source of a rename() is missing
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archived-at: Wed, 30 Nov 2016 11:48:01 -0000


    [ https://issues.apache.org/jira/browse/HDFS-6262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15708354#comment-15708354 ] 

Steve Loughran commented on HDFS-6262:
--------------------------------------

I concur. the newer rename, which in FileSystem is marked as @Deprecated, does do the check and has a more consistent model. We can undeprecate it (it was deprecated because it was "transitionary" to FileContext), move code to it

> HDFS doesn't raise FileNotFoundException if the source of a rename() is missing
> -------------------------------------------------------------------------------
>
>                 Key: HDFS-6262
>                 URL: https://issues.apache.org/jira/browse/HDFS-6262
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.4.0
>            Reporter: Steve Loughran
>            Assignee: Akira Ajisaka
>              Labels: BB2015-05-TBR
>         Attachments: HDFS-6262.2.patch, HDFS-6262.patch
>
>
> HDFS's {{rename(src, dest)}} returns false if src does not exist -all the other filesystems raise {{FileNotFoundException}}
> This behaviour is defined in {{FSDirectory.unprotectedRenameTo()}} -the attempt is logged, but the operation then just returns false.
> I propose changing the behaviour of {{DistributedFileSystem}} to be the same as that of the others -and of {{FileContext}}, which does reject renames with nonexistent sources


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