Hadoop 选项没有任何效果(mapreduce.input.lineinputformat.linespermap、mapred.max.map.failures.percent)

I am trying to implement a MapReduce job, where each of the mappers would take 150 lines of the text file, and all the mappers would run simmultaniously; also, it should not fail, no matter how many map tasks fail.

下面是配置部分:

        JobConf conf = new JobConf(Main.class);
        conf.setJobName("My mapreduce");

        conf.set("mapreduce.input.lineinputformat.linespermap", "150");
        conf.set("mapred.max.map.failures.percent","100");

        conf.setInputFormat(NLineInputFormat.class);

        FileInputFormat.addInputPath(conf, new Path(args[0]));
        FileOutputFormat.setOutputPath(conf, new Path(args[1]));

问题是 hadoop 为每一行文本创建一个映射器，它们似乎是按顺序运行的，如果单个失败，则作业失败.