hadoop mapreduce查看System.out的数据Actually stdout only shows the System.out.println() of the non
hadoop mapreduce查看System.out的数据
Actually stdout only shows the System.out.println() of the non map reduce classes. The System.out.println() for map and reduce phases can be seen in the logs. Easy way to access the logs is http://localhost:50030/jobtracker.jsp->click on the completed job->click on map or reduce task->click on tasknumber->task logs->stdout logs.