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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12484) Single File Rename Throws Incorrectly In Potential Race Condition Scenarios
Date Thu, 22 Oct 2015 21:33:27 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12484?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Chris Nauroth updated HADOOP-12484:
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 2.8.0
           Status: Resolved  (was: Patch Available)

+1 for patch v06 now that the style problems have been fixed.  I have committed this to trunk
and branch-2.  [~gouravk], thank you for contributing the patch.

> Single File Rename Throws Incorrectly In Potential Race Condition Scenarios
> ---------------------------------------------------------------------------
>                 Key: HADOOP-12484
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12484
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: tools
>            Reporter: Gaurav Kanade
>            Assignee: Gaurav Kanade
>             Fix For: 2.8.0
>         Attachments: HADOOP-12484.01.patch, HADOOP-12484.02.patch, HADOOP-12484.03.patch,
HADOOP-12484.04.patch, HADOOP-12484.05.patch, HADOOP-12484.06.patch
> FinishSingleFileRename function - in the case where src and dst both exist gets a lease
on src blob to block write access and then deletes the file. However in the time between checking
existence of source file and acquiring lease the file may be deleted by another process (race
condition). Presently the function simply throws in this scenario. In this case the function
should treat this as a case where rename is complete; i.e. catch the exception and if this
is the cause exit gracefully with the result that the rename is complete

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