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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8593) Calculation of effective layout version mishandles comparison to current layout version in storage.
Date Sun, 14 Jun 2015 14:25:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14585081#comment-14585081
] 

Hudson commented on HDFS-8593:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #217 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/217/])
HDFS-8593. Calculation of effective layout version mishandles comparison to current layout
version in storage. Contributed by Chris Nauroth. (cnauroth: rev b8341f1cd89791c51b396ad531ec7fcc631be149)
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> 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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