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Date: Mon, 2 Jun 2008 14:21:45 -0700 (PDT)
From: "Chris Douglas (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-3471) TestIndexedSort sometimes fails
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     [ https://issues.apache.org/jira/browse/HADOOP-3471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris Douglas updated HADOOP-3471:
----------------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

I just committed this.

> TestIndexedSort sometimes fails
> -------------------------------
>
>                 Key: HADOOP-3471
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3471
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred, test
>            Reporter: Chris Douglas
>            Assignee: Chris Douglas
>             Fix For: 0.18.0
>
>         Attachments: 3471-0.patch, 3471-1.patch
>
>
> After testing an array of equal values, TestIndexedSort::testAllEqual introduces a min and max value at random intervals:
> {noformat}
>     int diff = r.nextInt(SAMPLE);
>     values[diff] = 9;
>     values[(diff + r.nextInt(SAMPLE >>> 1)) % SAMPLE] = 11;
> {noformat}
> The max value can overwrite the min value and produce a spurious failure.

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