報錯日誌如下：

yun12-01: starting namenode, logging to hadoop-rand-namenode-yun12-01.out
yun12-01: /logs/hadoop-rand-namenode-yun12-01.out: Permission denied
yun12-01: /logs/hadoop-rand-namenode-yun12-01.out: Permission denied
yun12-01: /logs/hadoop-rand-namenode-yun12-01.out: Permission denied
yun12-01: starting datanode, logging to hadoop-2.4.1/logs/hadoop-rand-datanode-yun12-01.out
yun12-01: /hadoop-2.4.1/sbin/hadoop-daemon.sh: line 151: /hadoop-2.4.1/logs/hadoop-rand-datanode-yun12-01.out: Permission denied
yun12-01: head: cannot open '/logs/hadoop-rand-datanode-yun12-01.out' for reading: No such file or directory
yun12-01: /sbin/hadoop-daemon.sh: line 166: /home/rand/app/hadoop-2.4.1/logs/hadoop-rand-datanode-yun12-01.out: Permission denied
yun12-01: /sbin/hadoop-daemon.sh: line 167: /logs/hadoop-rand-datanode-yun12-01.out: Permission denied
Starting secondary namenodes [0.0.0.0]
 

類似這種出現Permission denied 首先排錯，Hadoop目錄下檔案的所有者和所屬主是root使用者還是當前使用者。

執行下面命令，將檔案所屬者和所屬組改為當前使用者。

sudo chown -R username:username /Hadoop-2.4.1/*

注：將username改為自己當前使用者。

如果仍然報錯：

1.判斷出錯的檔案路徑，如：當前是/logs檔案報的錯。

2.先備份logs檔案，再重新建立logs。

mv logs logsback
mkdir logs

3.最後重新啟動dfs：

start-dfs.sh