Apple Tree Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 25904 Accepted: 7682 Description There is an apple tree outside of kaka's house. Every autumn, a lot of apples will grow in the tree. Kaka likes apple very much, so he has been
照抄于网络: name value description dfs.namenode.logging.level info The logging level for dfs namenode. Other values are "dir"(trace namespace mutations), "block"(trace block under/over replications and blockcreations/deletions), or "al
不多说,直接上干货! name value description dfs.namenode.logging.level info The logging level for dfs namenode. Other values are "dir"(trace namespace mutations), "block"(trace block under/over replications and blockcreations/deletions), or &quo
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) 那我们来分析下这个错误,从字面上来理解: Name node is in safe mode 说明Hadoop的NameNode处在安全模式下. 那什么是Hadoop的安全模式呢? 在分布式文件系统启