Task failed task

[atguigu@hadoop102 hadoop-3.1.3]$ hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.3.jar wordcount /wcinput /wcoutput

输出文件没有内容。

修改默认配置文件“mapred-default.xml”

  mapreduce.task.timeout
  8000000 #延长时间600000修改为8000000
  The number of milliseconds before a task will be
  terminated if it neither reads an input, writes an output, nor
  updates its status string.  A value of 0 disables the timeout.