新手剛學hadoop,啥也不懂,跟着視頻上的老師敲,因為懶,在代碼中少加了一個目錄,
重點是最后一句,輸出路徑不能是已經存在的,最后一個目錄地址必須是還沒有被創建的,解決把以前建的目錄刪掉或者在代碼中加一個還不存在的目錄地址
2021-11-06 16:38:56,759 WARN [org.apache.hadoop.metrics2.impl.MetricsConfig] - Cannot locate configuration: tried hadoop-metrics2-jobtracker.properties,hadoop-metrics2.properties
2021-11-06 16:38:56,798 INFO [org.apache.hadoop.metrics2.impl.MetricsSystemImpl] - Scheduled Metric snapshot period at 10 second(s).
2021-11-06 16:38:56,798 INFO [org.apache.hadoop.metrics2.impl.MetricsSystemImpl] - JobTracker metrics system started
Exception in thread "main" org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory file:/D:/output already exists