Add workaround for ICU bug in combination with Java7 to LuceneTestCase
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Key: LUCENE-3344
URL: https://issues.apache.org/jira/browse/LUCENE-3344
Project: Lucene - Java
Issue Type: Bug
Components: modules/analysis
Environment: JDK7
Reporter: Uwe Schindler
Assignee: Uwe Schindler
Fix For: 3.4, 4.0
There is a bug in ICU that makes it fail to load it ULocale class in Java7:
http://bugs.icu-project.org/trac/ticket/8734
The problem is caused by some new locales in Java 7, that lead to a
chicken-and-egg problem in the static initializer of ULocale. It initializes
its default locale from the JDK locale in a static ctor. Until the default
ULocale instance is created, the default is not set in ULocale. But ULocales
ctor itsself needs the default locale to fetch some ressource bundles and
throws NPE.
The code in LuceneTestCase that randomizes the default locale should classload
ULocale before it tries to set another random locale, using a defined, safe
locale (Locale.US). Patch is easy.
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