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From "Jinghui Wang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-10843) TestGridmixRecord unit tests failure on PowerPC
Date Wed, 13 Aug 2014 00:36:12 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-10843?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jinghui Wang updated HADOOP-10843:
----------------------------------

    Attachment: HADOOP-10843.3.patch

> TestGridmixRecord unit tests failure on PowerPC
> -----------------------------------------------
>
>                 Key: HADOOP-10843
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10843
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: test, tools
>    Affects Versions: 2.2.0, 2.3.0, 2.4.0, 2.4.1
>            Reporter: Jinghui Wang
>            Assignee: Jinghui Wang
>         Attachments: HADOOP-10843.1.patch, HADOOP-10843.2.patch, HADOOP-10843.3.patch
>
>
> In TestGridmixRecord#binSortTest, the test expects the comparison result of WritableComparator.compareBytes,
which uses UnsafeComparer, to be the integer difference rather than the documented "@return
0 if equal, < 0 if left is less than right, etc.". 
> TestGridmixRecord#binSortTest code snippet
> {code}
>       final int chk = WritableComparator.compareBytes(
>           out1.getData(), 0, out1.getLength(),
>           out2.getData(), 0, out2.getLength());
>       assertEquals(chk, x.compareTo(y));
>       assertEquals(chk, cmp.compare(
>             out1.getData(), 0, out1.getLength(),
>             out2.getData(), 0, out2.getLength()));
> {code}
> The code snippet below shows the Unsafe comparator behavior for non-little-endian machines.

> {code}
> 	if (!littleEndian) {
> 	  return lessThanUnsigned(lw, rw) ? -1 : 1;
> 	}
> {code}



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