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From "Sean Mackrory (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-15889) String case conversions are locale-sensitive, used without locale
Date Wed, 25 May 2016 15:34:13 GMT
Sean Mackrory created HBASE-15889:

             Summary: String case conversions are locale-sensitive, used without locale
                 Key: HBASE-15889
                 URL: https://issues.apache.org/jira/browse/HBASE-15889
             Project: HBase
          Issue Type: Bug
    Affects Versions: 1.2.0
            Reporter: Sean Mackrory
            Priority: Minor

Static code analysis is flagging cases of String.toLowerCase and String.toUpperCase being
used without Locale. From the API reference:

Note: This method is locale sensitive, and may produce unexpected results if used for strings
that are intended to be interpreted locale independently. Examples are programming language
identifiers, protocol keys, and HTML tags. For instance, "TITLE".toLowerCase() in a Turkish
locale returns "t\u0131tle", where '\u0131' is the LATIN SMALL LETTER DOTLESS I character.
To obtain correct results for locale insensitive strings, use toLowerCase(Locale.ROOT).

Many uses of these functions do appear to be looking up classes, etc. and not dealing with
stored data, so I'd think there aren't significant compatibility problems here and specifying
the locale is indeed the safer way to go.

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