Hadoop運行jar包報錯java.lang.Exception: java.lang.ArrayIndexOutOfBoundsException: 1

錯誤信息：

java.lang.Exception: java.lang.ArrayIndexOutOfBoundsException: 1
    at org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:492)
    at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:552)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 1
    at exper.Filter$Map.map(Filter.java:25)
    at exper.Filter$Map.map(Filter.java:19)
    at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146)
    at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:799)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:347)
    at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:271)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
錯誤原因：源代碼中設置數據的分隔符為空格，而數據集中代碼分隔符為tab制表符
修改標紅語句：

public void map(Object key, Text value, Context context) throws IOException, InterruptedException {
 String line = value.toString();
 System.out.println(line);
 String arr[] = line.split("\t");
 newKey.set(arr[1]);
 context.write(newKey, NullWritable.get());
 System.out.println(newKey);
}

之后在Linux上運行jar文件：
在存儲jar包的文件夾下輸入命令：
hadoop jar MapreduceDemo-1.0-SNAPSHOT.jar exper.Filter /mymapreduce2/in/buyer_myfavorite1 /user/root/mymapreduce2/out
運行成功！