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https://issues.apache.org/jira/browse/HDFS-8593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14584729#comment-14584729
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Jing Zhao commented on HDFS-8593:
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Thanks for the fix, Chris! The patch looks pretty good to me. +1.
> 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
> 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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