查看日志的方法
hadoop-hadoop-datanode-hadoop002.log
hadoop-用户-进程名称-机器名称
hadoop日志分为log日志和out日志，我们基本上只看log日志
[hadoop@hadoop001 hadoop-2.6.0-cdh5.7.0]$ cd logs/
[hadoop@hadoop001 logs]$ ll
total 1840
-rw-rw-r-- 1 hadoop hadoop 143929 Feb 19 20:15 hadoop-hadoop-datanode-hadoop001.log
-rw-rw-r-- 1 hadoop hadoop 718 Feb 18 21:34 hadoop-hadoop-datanode-hadoop001.out
-rw-rw-r-- 1 hadoop hadoop 718 Feb 18 20:01 hadoop-hadoop-datanode-hadoop001.out.1
-rw-rw-r-- 1 hadoop hadoop 718 Feb 18 19:38 hadoop-hadoop-datanode-hadoop001.out.2
-rw-rw-r-- 1 hadoop hadoop 718 Feb 17 14:48 hadoop-hadoop-datanode-hadoop001.out.3
-rw-rw-r-- 1 hadoop hadoop 718 Feb 17 12:21 hadoop-hadoop-datanode-hadoop001.out.4
-rw-rw-r-- 1 hadoop hadoop 1369629 Feb 19 21:40 hadoop-hadoop-namenode-hadoop001.log
-rw-rw-r-- 1 hadoop hadoop 718 Feb 18 21:34 hadoop-hadoop-namenode-hadoop001.out
-rw-rw-r-- 1 hadoop hadoop 718 Feb 18 20:01 hadoop-hadoop-namenode-hadoop001.out.1
-rw-rw-r-- 1 hadoop hadoop 718 Feb 18 19:37 hadoop-hadoop-namenode-hadoop001.out.2
-rw-rw-r-- 1 hadoop hadoop 718 Feb 17 14:48 hadoop-hadoop-namenode-hadoop001.out.3
-rw-rw-r-- 1 hadoop hadoop 718 Feb 17 12:21 hadoop-hadoop-namenode-hadoop001.out.4
-rw-rw-r-- 1 hadoop hadoop 208892 Feb 19 21:35 hadoop-hadoop-secondarynamenode-hadoop001.log
-rw-rw-r-- 1 hadoop hadoop 718 Feb 18 21:34 hadoop-hadoop-secondarynamenode-hadoop001.out
-rw-rw-r-- 1 hadoop hadoop 718 Feb 18 20:01 hadoop-hadoop-secondarynamenode-hadoop001.out.1
-rw-rw-r-- 1 hadoop hadoop 718 Feb 18 19:38 hadoop-hadoop-secondarynamenode-hadoop001.out.2
-rw-rw-r-- 1 hadoop hadoop 718 Feb 17 14:49 hadoop-hadoop-secondarynamenode-hadoop001.out.3
-rw-rw-r-- 1 hadoop hadoop 718 Feb 17 12:21 hadoop-hadoop-secondarynamenode-hadoop001.out.4
-rw-rw-r-- 1 hadoop hadoop 0 Feb 17 12:21 SecurityAuth-hadoop.audit
drwxr-xr-x 2 hadoop hadoop 4096 Feb 19 21:39 userlogs
-rw-rw-r-- 1 hadoop hadoop 32298 Feb 19 19:59 yarn-hadoop-nodemanager-hadoop001.log
-rw-rw-r-- 1 hadoop hadoop 702 Feb 19 19:59 yarn-hadoop-nodemanager-hadoop001.out
-rw-rw-r-- 1 hadoop hadoop 35369 Feb 19 20:09 yarn-hadoop-resourcemanager-hadoop001.log
-rw-rw-r-- 1 hadoop hadoop 2078 Feb 19 20:01 yarn-hadoop-resourcemanager-hadoop001.out
[hadoop@hadoop001 logs]$
1.vi :/搜索
2.tail -200f xxx.log 查看日志的倒数200行 另外窗口重启进程 为了再现这个错误
3.rz上传到windows editplus去定位查看 备份