I installed hadoop 2.7.1 from root in /usr/local
now i want to give access to multiple users
when i executed the following command
hdfs dfs -mkdir /user
from hadoop user i got the error
mkdir: Permission denied: user=hadoop, access=WRITE, inode="/user":root:supergroup:drwxr-xr-x
how to resolve this problem . please help me in this
Thanks
suchetan
hdfs user is the admin user for the HDFS. Change to hdfs user and give the necessary permissions to the user you want(hadoop)
or
you can disable the dfs.permissions.enabled in the hdfs_site.xml and restart. After that you can create a folder.
Related
I've changed the permission of a hdfs directory via
hdfs dfs -chmod 777 /path/to/dir
but, when writing to that directory as a non-sudo user, i get a permission error
Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.AccessControlException): Permission denied: user=crtemois, access=WRITE, inode="/aggregation/system/data/clean":owners:hdfs:drwxr-xr-x
The reason is that Apache Ranger was layered on top. Even though the permissions were changed via chmod 777, if the user permission wasn't set in Apache Ranger, writing wouldn't be possible.
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 currently working on the Hortonworks practice exam and I am getting errors I have not been able to troubleshoot.
During the first step the prompt asks Put the three files from the home/horton/datasets/flight delays directory on the local machine into the user/horton/flight delays directory in hdfs permission denied error. When on the node that hdfs is installed on (root#namenode). I run the simple command:
hadoop fs -copyFromLocal /home/horton/datasets/flightdelays/flight_delays1.csv /user/horton/flightdelays
This returns the error /home/horton/datasets/flightdelays/flight_delays1.csv no such file or directory
When I run the same exact command above from the command line on the local machine instead of running it after being ssh'd onto the namenode (horton#some-ip) I get a permission denied error:
permission denied user=horton access=WRITE inode='/user/horton/flightdelays":hdfs:hdfs:drwxr-xr-x
If anyone has done this practice exam before or knows what this error is and could lend any assistance it would be greatly appreciated. When researching online a lot of people are running into the same issue with the permission denied but im going to assume that on a practice exam that they set up you shouldn't be needing to use sudo for every command you run.
Again any help would be fantastic thanks!!
Try this on CLI
sudo -u hdfs hdfs -copyFromLocal /input/file/path /hdfs/path/
Try this in your command line
hadoop fs -put /localfile.txt /hdfs path
The issue is that the folder you're trying to write to has ownership and permssions of hdfs:hdfs:drwxr-xr-x meaning it is owned by the 'hdfs' user and group. Only the hdfs user has write permissions to that folder everyone else has read and execute permissions only. Thus writing to that folder as the 'horton' user will not work.
You need to run the command as hdfs like so:
sudo -u hdfs hadoop fs -copyFromLocal /home/horton/datasets/flightdelays/flight_delays1.csv /user/horton/flightdelays
I have tried the below query.
hadoop jar /home/cloudera/workspace/para.jar word.Paras examples/wordcount /home/cloudera/Desktop/words/output
map reduce is started after that its showing below error. can anyone please help on this issue.
15/11/04 10:33:57 INFO mapred.JobClient: Task Id : attempt_201511040935_0008_m_000002_0, Status : FAILED
org.apache.hadoop.security.AccessControlException: Permission denied: user=cloudera, access=WRITE, inode="/":hdfs:supergroup:drwxr-xr-x
Do I need to change anything config file or in cloudera manager.
The exception suggests that you are trying to write to the HDFS root directory "/" which you (user:cloudera) does not have permission to do.
Without knowing what your specific jar does:
I guess that the last argument ("/home/cloudera/Desktop/words/output") is where you wish to place the output.
I guess this is supposed to be within HDFS where /home does not exist.
Try to change this to somewhere where you can write, possibly "/user/cloudera/words/output"
There are set of default directories to be created before you start using the hadoop cluster,
do, it should show you the directories
$ hadoop fs -ls /
sample user, if you want to run as cloudera you need on hdfs
/user/cloudera -- the user running the program
/user/hadoop -- your hadoop file system user
/user/mapred -- your mapred user
/tmp -- temporary which needs to have permission hdfs chmod 1777
HTH.
The last argument that you are passing should be the output path of HDFS not the default file system.
As you are running with cloudera user, you can point to the /user/cloudera/words/output. But first you need to check whether you have cloudera in your HDFS and you have write permission by issuing the following
hadoop fs -ls /user/
Once you have it change your command to following:
hadoop jar /home/cloudera/workspace/para.jar word.Paras examples/wordcount <path_where_you_have_write_permission_in_HDFS>
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 .