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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-8593) Calculation of effective layout version mishandles comparison to current layout version in storage.
Date Sat, 13 Jun 2015 17:57:01 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8593?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris Nauroth updated HDFS-8593:
--------------------------------
       Resolution: Fixed
    Fix Version/s: 2.8.0
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

Thank you for the review, Jing.  I have committed this to trunk and branch-2.

> Calculation of effective layout version mishandles comparison to current layout version
in storage.
> ---------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-8593
>                 URL: https://issues.apache.org/jira/browse/HDFS-8593
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>             Fix For: 2.8.0
>
>         Attachments: HDFS-8593.001.patch
>
>
> HDFS-8432 introduced the concept of a minimum compatible layout version so that downgrade
is applicable in a wider set of circumstances.  This includes logic for determining if the
current layout version in storage is within the bounds of the minimum compatible layout version.
 There is an inverted comparison in this logic, which can result in an incorrect calculation.



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