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https://issues.apache.org/jira/browse/HDFS-12008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16059989#comment-16059989
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Kihwal Lee commented on HDFS-12008:
-----------------------------------
This doesn't look right...
{{TestAvailableSpaceBlockPlacementPolicy}} passed when I tried this patch on
branch-2.8. BUT, the test result was wrong and the test case was testing for
the wrong behavior. The patch maintained the wrong behavior, so the test was
passing.
The patch has a simple bug, but that is not the cause of the test failure in
trunk.
> Improve the available-space block placement policy
> --------------------------------------------------
>
> Key: HDFS-12008
> URL: https://issues.apache.org/jira/browse/HDFS-12008
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: block placement
> Affects Versions: 2.8.1
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Attachments: HDFS-12008.patch
>
>
> AvailableSpaceBlockPlacementPolicy currently picks two nodes unconditionally,
> then picks one node. It could avoid picking the second node when not
> necessary.
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