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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10843) Unsafe.getLong is not supported correcly on Power PC, thus causing FastByteComparison's UnsafeComparer not working properly
Date Thu, 17 Jul 2014 17:53:05 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14065227#comment-14065227
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Colin Patrick McCabe commented on HADOOP-10843:
-----------------------------------------------

What do you mean by "not supported correctly"?  Are you talking about alignment restrictions
(i.e. address must be a multiple of 8).  Or something else?  If it is something else, I would
expect there to be a Sun/Oracle problem report open for this?

> Unsafe.getLong is not supported correcly on Power PC, thus causing FastByteComparison's
UnsafeComparer not working properly
> ---------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-10843
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10843
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 2.2.0, 2.3.0, 2.4.0, 2.4.1
>            Reporter: Jinghui Wang
>            Assignee: Jinghui Wang
>         Attachments: HADOOP-10843.patch
>
>
> Unsafe.getLong is not supported correcly on Power PC. FastByteComparison's UnsafeComparer
relies on unsafe method Unsafe.getLong, which is not correctly supported for Power PC.



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