运行hadoop程序时,有时候会报以下错误:org.apache.hadoop.dfs.SafeModeException: Cannot delete /user/hadoop/input. Name node is in safe mode这个错误应该还满常见的吧(至少我运行的时候是这样的)...
java.io.IOException: File … could only be replicated to 0 nodes, instead of 1。 使用dfsadmin -report报无数据节点,如下:[Hadoop@namenode hadoop]$ hadoop dfsadmin -report...