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https://issues.apache.org/jira/browse/HDFS-8593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14584751#comment-14584751
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Hudson commented on HDFS-8593:
------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #8014 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/8014/])
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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