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전자식을 사용하는 원격 컴퓨터에서 hadoop 2.2.0에서 wordcount 예제를 실행할 수 없습니다. 나는 runnable jar를 빌드하고> java -jar wordcount.jar를 사용하여 실행했다. 내가 실종 무엇 다음과 같은 오류hadoop 2.2.0 wordcount prg 원격에서 실행할 수 없음
Exception in thread "main" java.lang.NullPointerException
at java.lang.ProcessBuilder.start(Unknown Source)
at org.apache.hadoop.util.Shell.runCommand(Shell.java:404)
at org.apache.hadoop.util.Shell.run(Shell.java:379)
at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:589)
at org.apache.hadoop.util.Shell.execCommand(Shell.java:678)
at org.apache.hadoop.util.Shell.execCommand(Shell.java:661)
at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:639)
at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:435)
at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:277)
at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:125)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:344)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1268)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1265)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Unknown Source)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1265)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1286)
at org.myorg.WordCount.main(WordCount.java:69)
을 얻고있다
Configuration conf = new Configuration();
Job job = new Job(conf, "wordcount");
conf.set("fs.defaultFS", "hdfs://192.168.117.128:8020/");
conf.set("hadoop.job.ugi", "root");
conf.set("mapred.job.tracker", "192.168.117.128:8021");
Path inputPath = new Path("/input/FB_Bank_Comments_abi_required_original.txt");
Path outputPath = new Path("/output/wordcount"+System.currentTimeMillis());
job.setJobName("wordcount_analysis");
job.setJarByClass(Map.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(IntWritable.class);
job.setMapperClass(Map.class);
job.setReducerClass(Reduce.class);
job.setInputFormatClass(TextInputFormat.class);
job.setOutputFormatClass(TextOutputFormat.class);
FileInputFormat.addInputPath(job, inputPath);
FileOutputFormat.setOutputPath(job, outputPath);
job.waitForCompletion(true);
를 다음과 같이 내 드라이버 클래스 코드는? 어떤 도움을 주셔서 감사합니다