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I have installed Hadoop-2.7.3 on VirtualBox.

When I type the command ./start-all.sh in the terminal, the Namenode, Secondary Namenode & Datanode were not starting. The below is the error screenshot. Please suggest some solution for this issue.

Error I'm getting on my terminal window. 

sreenu@MyPC:~/hdfs/sbin$ ./start-all.sh

This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
17/07/24 16:38:12 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

Starting namenodes on [localhost]
localhost: ssh: connect to host localhost port 22: Connection refused
localhost: ssh: connect to host localhost port 22: Connection refused

Starting secondary namenodes [0.0.0.0]
0.0.0.0: ssh: connect to host 0.0.0.0 port 22: Connection refused

17/07/24 16:38:19 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

starting yarn daemons
resourcemanager running as process 2899. Stop it first.

localhost: ssh: connect to host localhost port 22: Connection refused

sreenu@MyPC:~/hdfs/sbin$ jps
3536 Jps
2899 ResourceManager
3175 JobHistoryServer

sreenu@MyPC:~/hdfs/sbin$

Error I'm seeing on terminal window.

Arpit
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Sreenu Aluru
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2 Answers2

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This issue was resolved on my machine by uninstalling and reinstalling the openssh-server and openssh-client.

Commands:

sudo apt-get remove openssh-server openssh-client

sudo apt-get install openssh-server openssh-client

Close the Terminal, Restart your VirtualBox and try to start all daemons again.

Sreenu Aluru
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After installing ssh, you need to actually start the ssh server. The problem with your setup is that your ssh server is not running. To verify this issue run:

$ ssh localhost

If you get the same error, i.e. localhost: ssh: connect to host localhost port 22: Connection refused, then start the ssh service using the following command:

$ /etc/init.d/ssh start

If you do not get any error with ssh localhost, then there is some other issue.

Shrey Dabhi
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