I followed this tutorial for installation of Hadoop. Unfortunately, when I run the dfs namenode -format script - The following error was printed on console:
but at the end i see this msg
dfs namenode -format
WARNING: /home/hdoop/hadoop-3.2.1/logs does not exist. Creating.
mkdir: cannot create directory ‘/home/hdoop/hadoop-3.2.1/logs’: Permission denied
ERROR: Unable to create /home/hdoop/hadoop-3.2.1/logs. Aborting.
thank u
also when i run
./start-dfs.sh
Starting namenodes on [localhost]
localhost: WARNING: /home/hdoop/hadoop-3.2.1/logs does not exist. Creating.
Starting datanodes
Starting secondary namenodes [blabla]
blabla: Warning: Permanently added 'blabla,192.168.100.10' (ECDSA) to the list of known hosts.
change the permission of /home/hdoop to the correct one!
i sloved this link here
According to my configuration i didn't set JAVA_HOME within PATH
$ which java
$ echo $JAVA_HOME
Also,i change the value of HADOOP_OPTS in hadoop-env.sh as given below.
export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib/"
the image before and after
Create Directory :- Create "logs" directory by using root access yourself.As in this case directory was logs create it at /home/hdoop/hadoop-3.2.1/ (eg. "/home/{username}/{extracted hadoop directory}/" )
Give Access of Directory :- Make it accessible by using sudo chmod 777 {directory location}
In this case - sudo chmod 777 /home/hdoop/hadoop-3.2.2/logs To see it worked in my case see following image :
solved it by giving access of following directory
Related
I tried installing hadoop using this tutorial, link (timestamped the video from where problem occurs)
However, after formatting the namenode(hdfs namenode -format) I don't get the "name" folder in /abc.
Also the start-all.sh and other /sbin commands dont work.
P.S I did try installing hadoop as a single node which didnt work so I tried removing it, redoing everything as a double node setup, so i had to reformat the namenode..i dont know if that affected this somehow.
EDIT 1: I fixed the start-all.sh command not working because there was a mistake in .bashrc that i corrected.
However I get these error messages when running start-all.sh or start-dfs.sh etc.
hadoop#linux-virtual-machine:~$ start-dfs.sh
Starting namenodes on [localhost]
localhost: mkdir: cannot create directory ‘/usr/local/hadoop-2.10.0/logs’: Permission denied
localhost: chown: cannot access '/usr/local/hadoop-2.10.0/logs': No such file or directory
localhost: starting namenode, logging to /usr/local/hadoop-2.10.0/logs/hadoop-hadoop-namenode-linux-virtual-machine.out
localhost: /usr/local/hadoop-2.10.0/sbin/hadoop-daemon.sh: line 159: /usr/local/hadoop-2.10.0/logs/hadoop-hadoop-namenode-linux-virtual-machine.out: No such file or directory
localhost: head: cannot open '/usr/local/hadoop-2.10.0/logs/hadoop-hadoop-namenode-linux-virtual-machine.out' for reading: No such file or directory
localhost: /usr/local/hadoop-2.10.0/sbin/hadoop-daemon.sh: line 177: /usr/local/hadoop-2.10.0/logs/hadoop-hadoop-namenode-linux-virtual-machine.out: No such file or directory
localhost: /usr/local/hadoop-2.10.0/sbin/hadoop-daemon.sh: line 178: /usr/local/hadoop-2.10.0/logs/hadoop-hadoop-namenode-linux-virtual-machine.out: No such file or directory
localhost: mkdir: cannot create directory ‘/usr/local/hadoop-2.10.0/logs’: Permission denied
localhost: chown: cannot access '/usr/local/hadoop-2.10.0/logs': No such file or directory
localhost: starting datanode, logging to /usr/local/hadoop-2.10.0/logs/hadoop-hadoop-datanode-linux-virtual-machine.out
localhost: /usr/local/hadoop-2.10.0/sbin/hadoop-daemon.sh: line 159: /usr/local/hadoop-2.10.0/logs/hadoop-hadoop-datanode-linux-virtual-machine.out: No such file or directory
localhost: head: cannot open '/usr/local/hadoop-2.10.0/logs/hadoop-hadoop-datanode-linux-virtual-machine.out' for reading: No such file or directory
localhost: /usr/local/hadoop-2.10.0/sbin/hadoop-daemon.sh: line 177: /usr/local/hadoop-2.10.0/logs/hadoop-hadoop-datanode-linux-virtual-machine.out: No such file or directory
localhost: /usr/local/hadoop-2.10.0/sbin/hadoop-daemon.sh: line 178: /usr/local/hadoop-2.10.0/logs/hadoop-hadoop-datanode-linux-virtual-machine.out: No such file or directory
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:a37ThJJRRW+AlDso9xrOCBHzsFCY0/OgYet7WczVbb0.
Are you sure you want to continue connecting (yes/no)? no
0.0.0.0: Host key verification failed.
EDIT 2: Fixed the above error my changing the permissions to hadoop folder (in my case both hadoop-2.10.0 and hadoop)
start-all.sh works perfectly but namenode doesnt show up.
It's not clear how you setup your PATH variable. Or how the scripts are not "working". Did you chmod +x them to make them executable? Any logs output that comes from them at all?
The start-all script is available in the sbin directory of where you downloaded Hadoop, so just /path/to/sbin/start-all.sh is all you really need.
Yes, the namenode needs formatted on a fresh cluster. Using the official Apache Guide is the most up-to-date source and works fine for most.
Otherwise, I would suggest you learn about Apache Amabri, which can automate your installation. Or just use a Sandbox provided by Cloudera, or use many of the Docker containers that already exist for Hadoop if you don't care about fully "installing" it.
While trying to use the put command to add patternsToSkip file to hdfs, I get an error saying: Permission denied: user=root, access=WRITE, inode="/user":hdfs:hdfs:drwxr-xr-x
In the image below, you can see the sequence of commands written along with the error:
I tried to user access as biadmin, root, and even hdfs but with no luck! (details in the image)
please help me fix this error. Thanks folks.
Reason, it is giving permission issue is because you are trying to put the file inside /user directory in hdfs since you are using 2 dots in put statement. You need to login as supergroup to access or copy file inside that particular directory.
What i would suggest is try running below commands to copy file to hdfs.
Target with one dot
hadoop fs -put patternsToSkip .
OR
Giving complete target directory path
hadoop fs -put patternsToSkip /user/<instance_name>/output
I am trying to install hadoop (2.7) in cluster (two machines hmaster and hslave1). I installed hadoop in the folder /opt/hadoop/
I followed this tutorial but Iwhen I run the command start-dfs.sh, I got the following error about:
hmaster: starting namenode, logging to /opt/hadoop/logs/hadoop-hadoop-namenode-hmaster.out
hmaster: starting datanode, logging to /opt/hadoop/logs/hadoop-hadoop-datanode-hmaster.out
hslave1: mkdir: impossible to create the folder « /opt/hadoop\r »: Permission denied
hslave1: chown: impossible to reach « /opt/hadoop\r/logs »: no file or folder of this type
/logs/hadoop-hadoop-datanode-localhost.localdomain.out
I used the command chmod 777 for the folder hadoop in hslave but I still have this error.
Insted of using /opt/ use /usr/local/ if you get that permission issue again give the root permissions using chmod. I already configured hadoop 2.7 in 5 machines. Or else use "Sudo chown user:user /your log files directory".
Seems you have already gave master password less access to login slave.
Make sure you are logged in with username available on both servers.
(hadoop in your case, as tutorial you are following uses 'hadoop' user.)
you can edit the '/etc/sudoer' file using 'sudo' or directly type 'visudo' in the terminal and add the following permission for newly created user 'hadoop' :-
hadoop ALL = NOPASSWD: ALL
might it will resolved your issues.
When I execute the get command it says permission denied,
I tried the already given solution but didn't worked. Following is the command and its op
hduser#ubuntu:~$ hadoop fs -get /user/hduser/Input/pg*.txt /home/vilas/Desktop/
Warning: $HADOOP_HOME is deprecated.
get: Permission denied
Check out the permissions of this /user/hduser directory, maybe hduser does not have permission to access it, if so then you can execute the following command (as hdfs user)
hdfs dfs chown hduser:hduser /user/hduser
More information about chown here.
then try again.
you must go into the desktop directory, open the terminal there and run the command
hadoop fs -get /user/hduser/Input/pg*.txt .
I just installed Hadoop single node but when i run it by logging on localhost it gives error that it cannot make changes to files as permission is denied?
Have you followed all the steps as suggested in: http://hadoop.apache.org/common/docs/current/single_node_setup.html ?
You may want to look at this : http://getsatisfaction.com/cloudera/topics/permission_denied_error_in_desktop
Also, some more information would definitely help.
You have not given necessary permissions.Make a different user other than root.Follow this tutorial to the point http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/
It seems to be missing permissions for the user on the directory containing the files
make sure that the user you are logged on , is the owner of the Hadoop directory by running
ls -la command
if not the owner run the command chown -R hadoop user:group hadoop directory and it will work fine.
also you can follow the tutorial of michael noll
http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/