1) Stopping all aruna@aruna:~/hadoop-2.7.3/sbin$ ./stop-all.sh This script is Deprecated. Instead use stop-dfs.sh and stop-yarn.sh Stopping namenodes on [localhost] aruna@localhost's password: localhost: stopping namenode aruna@localhost's password: localhost: no datanode to stop Stopping secondary namenodes [0.0.0.0] aruna@0.0.0.0's password: 0.0.0.0: stopping secondarynamenode stopping yarn daemons stopping resourcemanager aruna@localhost's password: localhost: stopping nodemanager no proxyserver to stop 2) Start all aruna@aruna:~/hadoop-2.7.3/sbin$ ./start-all.sh This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh Starting namenodes on [localhost] aruna@localhost's password: localhost: starting namenode, logging to /home/aruna/hadoop-2.7.3/logs/hadoop-aruna-namenode-aruna.out aruna@localhost's password: localhost: starting datanode, logging to /home/aruna/hadoop-2.7.3/logs/hadoop-aruna-datanode-aruna.out Starting secondary namenodes [0.0.0.0] aruna@0.0.0.0's password: 0.0.0.0: starting secondarynamenode, logging to /home/aruna/hadoop-2.7.3/logs/hadoop-aruna-secondarynamenode-aruna.out starting yarn daemons starting resourcemanager, logging to /home/aruna/hadoop-2.7.3/logs/yarn-aruna-resourcemanager-aruna.out aruna@localhost's password: localhost: starting nodemanager, logging to /home/aruna/hadoop-2.7.3/logs/yarn-aruna-nodemanager-aruna.out 3)Check the status, but here Namenode missing now? but is above log shows starting namenode. aruna@aruna:~/hadoop-2.7.3/sbin$ sudo jps [sudo] password for aruna: 22097 ResourceManager 22404 NodeManager 21751 DataNode 16697 JobHistoryServer 21934 SecondaryNameNode 22542 Jps ... View more

I tried jay, But seems its not starting the datanode aruna@aruna:~/hadoop-2.7.3/sbin$ ./start-dfs.sh Starting namenodes on [localhost] aruna@localhost's password: localhost: namenode running as process 15735. Stop it first. aruna@localhost's password: localhost: starting datanode, logging to /home/aruna/hadoop-2.7.3/logs/hadoop-aruna-datanode-aruna.out Starting secondary namenodes [0.0.0.0] aruna@0.0.0.0's password: 0.0.0.0: secondarynamenode running as process 16071. Stop it first. aruna@aruna:~/hadoop-2.7.3/sbin$ sudo jps 16241 ResourceManager 16486 NodeManager 16071 SecondaryNameNode 15735 NameNode 16697 JobHistoryServer 20620 Jps aruna@aruna:~/hadoop-2.7.3/sbin$ ... View more

Anyway i followed all the steps in below tutorial. https://www.youtube.com/watch?v=l1QmEPEAems And then when i try to run the sudo jps command it shows below result. aruna@aruna:~/hadoop-2.7.3$ sudo jps [sudo] password for aruna: 16241 ResourceManager 19010 Jps 16486 NodeManager 16071 SecondaryNameNode 15735 NameNode 16697 JobHistoryServer Only datanode is missing. How can i start datanode ? ... View more

@jen SenSharma 1) Since i am currently using "aruna" username its better if i can use same for all the things in hadoop also. actually this all starts when i try to start DFS demon. The it keep asking below thin. The authenticity of host 'localhost (127.0.0.1)' can't be established. ECDSA key fingerprint is SHA256:AlJLUiaOyWSm5W3+VAi1hDfgpFvZeLOMU6a4lviRojE. Are you sure you want to continue connecting (yes/no)? Then I followed steps in below link to Configuring passphraseless SSH https://learninghadoopblog.wordpress.com/2013/08/03/hadoop-0-23-9-single-node-setup-on-ubuntu-13-04/. I completed first 2 steps. Third step is as below # Write the public key file for the generated RSA key into the authorized_key file $ cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys 2) So when i try to complete it gives me error . Still i am unable to complete the above step. ... View more

my .ssh folder is located in /home/aruna$ folder. My Hadoop_RSA_KeyPair.pub file is located in /home/hadoop folder. So i try to copy key file from /home/hadoop to /home/aruna/.ssh folder as shown below. hadoop@aruna:~$ ssh-copy-id -i Hadoop_RSA_KeyPair.pub $HOME/aruna/.ssh/authorized_keys /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "Hadoop_RSA_KeyPair.pub" mktemp: failed to create file via template ‘/home/hadoop/.ssh/ssh-copy-id_id.XXXXXXXXXX’: No such file or directory /usr/bin/ssh-copy-id: ERROR: mktemp failed But it gives me error? ... View more

Thanks Jay.I installed openssh-server and try again. aruna@aruna:~/hadoop-2.7.3/sbin$ ./start-dfs.sh Starting namenodes on [localhost] The authenticity of host 'localhost (127.0.0.1)' can't be established. ECDSA key fingerprint is SHA256:AlJLUiaOyWSm5W3+VAi1hDfgpFvZeLOMU6a4lviRojE. Are you sure you want to continue connecting (yes/no)? y Please type 'yes' or 'no': yes localhost: Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts. aruna@localhost's password: localhost: starting namenode, logging to /home/aruna/hadoop-2.7.3/logs/hadoop-aruna-namenode-aruna.out aruna@localhost's password: localhost: starting datanode, logging to /home/aruna/hadoop-2.7.3/logs/hadoop-aruna-datanode-aruna.out Starting secondary namenodes [0.0.0.0] The authenticity of host '0.0.0.0 (0.0.0.0)' can't be established. ECDSA key fingerprint is SHA256:AlJLUiaOyWSm5W3+VAi1hDfgpFvZeLOMU6a4lviRojE. Are you sure you want to continue connecting (yes/no)? yes 0.0.0.0: Warning: Permanently added '0.0.0.0' (ECDSA) to the list of known hosts. aruna@0.0.0.0's password: 0.0.0.0: starting secondarynamenode, logging to /home/aruna/hadoop-2.7.3/logs/hadoop-aruna-secondarynamenode-aruna.out Anyway it keeps asking me below thin.I typed "YES" several times. The authenticity of host 'localhost (127.0.0.1)' can't be established. ECDSA key fingerprint is SHA256:AlJLUiaOyWSm5W3+VAi1hDfgpFvZeLOMU6a4lviRojE. Are you sure you want to continue connecting (yes/no)? ... View more

I check with below command .Port 22 is not open i think. aruna@aruna:~/hadoop-2.7.3/sbin$ sudo netstat -plnt Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 127.0.1.1:53 0.0.0.0:* LISTEN 2999/dnsmasq ... View more