hadoopjob执行完之后：
点击 https://n1.hadoop:19888/jobhistory/attempts/job_1406341693880_0001/r/SUCCESSFUL 出现Aggregation is not enabled. Try the nodemanager at d2.hadoop:42812 错误。https://n1.hadoop:198
阅读背景：
查看job的详细日志出错： Aggregation is not enabled. Try the nodemanager at d2.hadoop:42812
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