摘要:
MapReduce任务 计数器 org.apache.hadoop.mapreduce.TaskCounter 文件系统计数器 org.apache.hadoop.mapreduce.FileSystemCounter FileInputFormat 计数器 org.apache.hadoop.ma 阅读全文
摘要:
12-MapReduce运行机制-Map阶段 15-MapReduce-Reduce端join操作-步骤分析 利用MapReduce来模拟数据中的连表查询 orders.txt 1001,20150710,p0001,21002,20150710,p0002,31002,20150710,p0003 阅读全文
摘要:
Maven项目在打jar包时,报错提示:[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK? 报错的提示已经讲得很清楚,当前运行的环境为JRE, 阅读全文