Java HDFS权限被拒绝

我正在尝试从java启动MapReduce作业。但是，当我尝试提交作业时，我得到了

权限被拒绝

异常。我能够从命令行运行

hdfs dfs-ls/

，没有任何错误。但是它在我的java程序中不起作用

这是我的密码

public static void main(String[] args) {
    Configuration conf=new Configuration();

    conf.set("mapreduce.map.class","org.apache.hadoop.conf.TestMapper");
    conf.set("mapreduce.reduce.class","org.apache.hadoop.conf.TestReducer");

    conf.set("mapreduce.framework.name","yarn");

    conf.set("hadoop.security.group.mapping","org.apache.hadoop.security.ShellBasedUnixGroupsMapping");

    conf.set("fs.default.name","hdfs://master:9000");

    conf.set("dfs.permission","false");

    conf.set("yarn.nodemanager.aux-services","mapreduce_shuffle");
    conf.set("yarn.resourcemanager.resource-tracker.address","master:8025");
    conf.set("yarn.resourcemanager.scheduler.address","master:8030");
    conf.set("yarn.resourcemanager.address","master:8040");
    conf.set("yarn.nodemanager.localizer.address","master:8060");
    Job job=null;
    try {
        job = Job.getInstance(conf, "Test Map Reduce");

        job.setJarByClass(RunJob.class);

        job.setOutputKeyClass(LongWritable.class);
        job.setOutputValueClass(Text.class);

        job.setInputFormatClass(TextInputFormat.class);
        job.setOutputFormatClass(TextOutputFormat.class);

        TextInputFormat.setInputPaths(job, new Path("/input.txt"));
        TextOutputFormat.setOutputPath(job, new Path("/output"));

        job.submit();

}

但我有以下例外

org.apache.hadoop.security.AccessControlException: Permission denied: user=manthosh, access=EXECUTE, inode="/tmp":hduser:supergroup:drwxrwx---

这个解决方案行不通

---

我缺少什么？

是dfs.permissions（注意事项），我建议您在conf/*.xml文件中设置这些属性，而不是在代码中设置。检查这些属性在配置文件中是否设置为final。因为如果是这样，你不能从任何应用程序更新它们。