java - Hadoop 路径添加 %2F

Question

我在 hadoop 中有一个文件:/home/hduser/IH/input/imageslocalpaths.txt(我已经使用 hadoop fs -ls IH/input/imageslocalpaths.txt 检查了它是否存在)。当我运行时:

hadoop jar IH.jar IH/input/imageslocalpaths.txt

我得到:

Input path does not exist: hdfs://localhost:54310/user/hduser/IH%2Finput%2Fimageslocalpaths.txt

谁能告诉我如何阻止 Hadoop 将斜杠更改为 %2F 或其他解决方法？

(我已经尝试了完整路径，但 hadoop 只是将它添加到/user/hduser 的末尾，给出/user/hduser/user/hduser... 仍然带有 %2F)。

这里是我的主要要求(你想要其他位吗？)

    public static void main(String[] args) throws Exception {

        Configuration conf = new Configuration();
        Configuration conf2 = new Configuration();

        conf.set("fs.defaultFS", "hdfs://localhost:54310");

        String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

        Job job1 = new Job(conf, "MergeImages");

        job1.setJarByClass(ImageHandlerMain.class);
        job1.setMapperClass(BinaryFilesToHadoopSequenceFileMapper.class);
        job1.setOutputKeyClass(Text.class);
        job1.setOutputValueClass(BytesWritable.class);

        FileInputFormat.addInputPath(job1, new Path(URLEncoder.encode(otherArgs[0],"UTF-8")));
        job1.setInputFormatClass(TextInputFormat.class);     

        FileOutputFormat.setOutputPath(job1, new Path(URLEncoder.encode(otherArgs[1],"UTF-8"))); //put result into intermediate folder
        job1.setInputFormatClass(TextInputFormat.class);
        job1.setOutputFormatClass(SequenceFileOutputFormat.class);
        ControlledJob cJob1 = new ControlledJob(conf);
        cJob1.setJob(job1);

        Job job2 = new Job(conf2,"FindDuplicates");

        job2.setJarByClass(ImageHandlerMain.class);
        job2.setMapperClass(ImagePHashMapper.class); 
        job2.setReducerClass(ImageDupsReducer.class);
        job2.setOutputKeyClass(Text.class);
        job2.setOutputValueClass(Text.class);        
        FileInputFormat.addInputPath(job2, new Path(URLEncoder.encode(otherArgs[1],"UTF-8") + "/part-r-00000")); //get the part-r-00000 file from the intermediate folder
        FileOutputFormat.setOutputPath(job2, new  Path(otherArgs[2])); //put result into output folder
        job2.setInputFormatClass(SequenceFileInputFormat.class);
        ControlledJob cJob2 = new ControlledJob(conf2);
        cJob2.setJob(job2);
        JobControl jobctrl = new JobControl("jobctrl");
        jobctrl.addJob(cJob1);
        jobctrl.addJob(cJob2);
        cJob2.addDependingJob(cJob1);
        jobctrl.run();


}

Answer 1

问题出在这行代码中

FileInputFormat.addInputPath(job2, new Path(URLEncoder.encode(otherArgs[1],"UTF-8") + "/part-r-00000")); //get the part-r-00000 file from the intermediate folder

此处，当您在创建路径时使用 URLEncoder.encode，它将“/”转换为 %2F。

可能的解决方案

FileInputFormat.addInputPath(job2, new Path(URLEncoder.encode(otherArgs[1],"UTF-8").replace("%2F", "/") + "/part-r-00000")); //get the part-r-00000 file from the intermediate folder

编码后只需将“%2F”替换回“/”即可。