Use Java's ServiceLoader to add default resources to Configuration
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Key: HADOOP-7077
URL: https://issues.apache.org/jira/browse/HADOOP-7077
Project: Hadoop Common
Issue Type: Improvement
Components: conf
Reporter: Tom White
Currently each class with a main() method (in HDFS and MapReduce) calls
Configuration.addDefaultResource() to add the names of resource files to load
(e.g. see DataNode and NameNode which both add hdfs-default.xml and
hdfs-site.xml). We could reduce the code duplication by allowing the use of
[java.util.ServiceLoader|http://download.oracle.com/javase/6/docs/api/java/util/ServiceLoader.html]
to do the initialization.
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