从IDE内部运行时的Hadoop路径异常

Edit: IDE is Intellij IDEA
      OS: Mac OS X Lion
      Hadoop: 1.2.1

编辑：如果文件路径存在于当前文件系统位置，则此方法有效 . 因此，问题就变成了如何在从IDE运行时使用hdfs .

从IDE（Intellij IDEA）内部运行获取异常，请参见下文：

在程序参数中我指定'输入输出'

当然，HDFS中存在“输入”，其中包含数据文件 .

但代码正在尝试从HDFS访问本地项目文件系统位置的目录 .

hdfs命令：

James-MacBook-Pro:conf james$ hadoop fs -ls input
Found 1 items
-rw-r--r--   1 james supergroup         15 2013-11-01 07:31 /user/james/input/simple.txt

Java源代码：

public class WordCount extends Configured implements Tool {
    public static void main(String[] args) throws Exception {
        int res = ToolRunner.run(new Configuration(), new WordCount(), args);
        System.exit(res);
    }
    @Override
    public int run(String[] args) throws Exception {
        if (args.length != 2) {
            System.err.println("Usage: hadoop jar mrjob-1.0-SNAPSHOT-job.jar"
                                       + " [generic options] <in> <out>");
            System.out.println();
            ToolRunner.printGenericCommandUsage(System.err);
            return 1;
        }
        Job job = new Job(getConf(), "WordCount");
        job.setJarByClass(getClass());
        job.setMapperClass(TokenizingMapper.class);
        job.setCombinerClass(IntSumReducer.class);
        job.setReducerClass(IntSumReducer.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(IntWritable.class);
        FileInputFormat.addInputPath(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));
        boolean success = job.waitForCompletion(true);
        return success ? 0 : 1;
    }
}

组态：

核心的site.xml

<configuration>
 <property>
    <name>fs.default.name</name>
    <value>hdfs://localhost:9000</value>
 </property>
</configuration>

HDFS-site.xml中

<configuration>
     <property>
        <name>dfs.replication</name>
        <value>1</value>
     </property>
</configuration>

mapred-site.xml中

<configuration>
    <property>
        <name>mapred.job.tracker</name>
        <value>localhost:9001</value>
     </property>
</configuration>

IDE中的参数：

input output

例外：

Nov 03, 2013 9:46:00 AM org.apache.hadoop.security.UserGroupInformation doAs
SEVERE: PriviledgedActionException as:james cause:org.apache.hadoop.mapreduce.lib.input.InvalidInputException: Input path does not exist: file:/Users/james/work/projects/hadoop/mrjob/input
Exception in thread "main" org.apache.hadoop.mapreduce.lib.input.InvalidInputException: Input path does not exist: file:/Users/james/work/projects/hadoop/mrjob/input

What have I done wrong?