Ssh

驗證 start-dfs.sh

  • June 26, 2018

我正在嘗試按照本指南設置一個 Hadoop 集群,其中 master 是我的筆記型電腦,slave 是 virtualbox 。所以,我做到了,從master

gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ sudo ./start-dfs.sh
Starting namenodes on [master]
root@master's password: 
master: namenode running as process 2911. Stop it first.
root@master's password: root@slave-1's password: 
master: datanode running as process 3057. Stop it first.
<I gave password again here>

slave-1: starting datanode, logging to /home/hadoopuser/hadoop/logs/hadoop-root-datanode-gsamaras-VirtualBox.out
Starting secondary namenodes [0.0.0.0]
root@0.0.0.0's password: 
0.0.0.0: secondarynamenode running as process 3234. Stop it first.
gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ su - hadoopuser
Password: 
-su: /home/hduser/hadoop/sbin: No such file or directory
hadoopuser@gsamaras:~$ jps
15845 Jps

指南指出:“此命令的輸出應列出主節點上的 NameNode、SecondaryNameNode、DataNode 和所有從屬節點上的 DataNode。”,這似乎不是這種情況(是嗎?)然後我檢查了奴隸的日誌:

cat hadoop-root-datanode-gsamaras-VirtualBox.log
..rver: master/192.168.1.2:54310. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-01-24 02:42:14,160 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: master/192.168.1.2:54310

gsamaras@gsamaras-VirtualBox:/home/hadoopuser/hadoop/logs$ ssh master
gsamaras@master's password: 
Welcome to Ubuntu 14.04.3..

主節點中的日誌似乎沒有錯誤。請注意,我可以從 master 到 slave 進行無密碼 ssh,但反之亦然,該指南沒有提到這樣的事情。請問有什麼想法


當我執行stop-dfs.sh時,我收到錯誤消息:

slave-1: no datanode to stop

現在,我又做了一次,我進入了主人

gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ sudo ./stop-dfs.sh
Stopping namenodes on [master]
root@master's password: 
master: no namenode to stop
root@master's password: root@slave-1's password: 
master: no datanode to stop   
slave-1: stopping datanode
Stopping secondary namenodes [0.0.0.0]
root@0.0.0.0's password: 
0.0.0.0: stopping secondarynamenode
gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ jps
19048 Jps
gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ ps axww | grep hadoop
19277 pts/1    S+     0:00 grep --color=auto hadoop
gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ jps
19278 Jps

ps axww | grep hadoopslave中,給出了 id 為 2553 的程序。

我不僅要像我想的那樣在 hadoop-data 文件夾中設置權限,而且還要在 hadoop 文件夾本身中設置權限:

sudo chown -R hadoopuser /home/hadoopuser/hadoop/

我從這裡得到了這個想法。

引用自:https://unix.stackexchange.com/questions/257279