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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11602) Fix toUpperCase/toLowerCase to use Locale.ENGLISH
Date Thu, 19 Feb 2015 16:21:12 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14327689#comment-14327689
] 

Steve Loughran commented on HADOOP-11602:
-----------------------------------------

Konstantin —the problem with setting the default locale is that while you can do it on the
entry points & your apps, when the code gets picked up and used as a library you don't
have that control (and shouldn't be hitting the defaults).

In SLIDER-737 we ended up setting the locale at the OS level for YARN containers; took the
problem away at a higher level

> Fix toUpperCase/toLowerCase to use Locale.ENGLISH
> -------------------------------------------------
>
>                 Key: HADOOP-11602
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11602
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.6.0
>            Reporter: Tsuyoshi OZAWA
>            Assignee: Tsuyoshi OZAWA
>         Attachments: HADOOP-11602-001.patch, HADOOP-11602-002.patch, HADOOP-11602-branch-2.001.patch
>
>
> String#toLowerCase()/toUpperCase() without a locale argument can occur unexpected behavior
based on the locale. It's written in [Javadoc|http://docs.oracle.com/javase/7/docs/api/java/lang/String.html#toLowerCase()]:
> {quote}
> For instance, "TITLE".toLowerCase() in a Turkish locale returns "t\u0131tle", where '\u0131'
is the LATIN SMALL LETTER DOTLESS I character
> {quote}
> This issue is derived from HADOOP-10101.



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