While firing this command, it throws an error
hdfs dfs -copyFromLocal /home/osboxes/sample new
copyFromLocal: `new': No such file or directory"
hdfs dfs -ls gives" ls: `.': No such file or directory"
You don't have a HDFS user directory to copy anything into
Verify by hdfs dfs -ls /user | grep $(whoami)
You need to make this folder before you can really do anything useful such as running MapReduce, or copying files into the relative path of the user folder such as you've done
hdfs dfs -mkdir -p "/user/$(whoami)"
hdfs dfs -chown -R $(whoami) "/user/$(whoami)"
Then run your copy command
Or give a different path hdfs dfs -copyFromLocal file /tmp/somePlace
Related
I'm new to Hadoop, and am trying to check what data is available in HDFS. However, the dfs command returns a response that indicates the class is deprecated, and that hdfs should be used:
-bash-4.2$ hadoop dfs -ls
DEPRECATED: Use of this script to execute hdfs command is deprecated.
Instead use the hdfs command for it.
ls: `.': No such file or directory
When I try the hdfs command, though, I get what appears to be a Java class lookup error:
-bash-4.2$ hadoop hdfs -ls
Error: Could not find or load main class hdfs
Is there something wrong with my Hadoop setup, or have others encountered this catch-22?
It is hadoop fs or hdfs dfs, then -ls
You can run hdfs dfs -ls / to check the root of HDFS, but you will get .: No such file or directory because the output of echo "hdfs:///user/$(whoami)" does not exist yet, and you need to make it using hadoop fs -mkdir -p hdfs:///user/$(whoami).
That command must be repeated for every user account that attempts to access their HDFS user directory
I have a local VM that has Hortonworks Hadoop and hdfs installed on it. I ssh'ed into the VM from my machine and now I am trying to copy a file from my local filesystem into hdfs through following set of commands:
[root#sandbox ~]# sudo -u hdfs hadoop fs -mkdir /folder1/
[root#sandbox ~]# sudo -u hdfs hadoop fs -copyFromLocal /root/folder1/file1.txt /hdfs_folder1/
When I execute it I get following error as - copyFromLocal:/root/folder1/file1.txt': No such file or directory
I can see that file right in /root/folder1/ directory but with hdfs command its throwing above error. I also tried to cd to /root/folder1/ and then execute the command but same error comes. Why is the file not getting found when it is right there?
By running sudo -u hdfs hadoop fs..., it tries to read the file /root/folder1/file.txt as hdfs.
You can do this.
Run chmod 755 -R /root. It will change permissions on directory and file recursively. But it is not recommended to open up permission on root home directory.
Then you can run the copyFromLocal as sudo -u hdfs to copy file from local file system to hdfs.
Better practice is to create user space for root and copy files directly as root.
sudo -u hdfs hadoop fs -mkdir /user/root
sudo -u hdfs hadoop fs -chown root:root /user/root
hadoop fs -copyFromLocal
I had the same problem running a Hortonworks 4 node cluster. As mentioned, user "hdfs" doesn't have permission to the root directory. The solution is to copy the information from the root folder to something the "hdfs" user can access. In the standard Hortonworks installation this is /home/hdfs
as root run the following...
mkdir /home/hdfs/folder1
cp /root/folder1/file1.txt /home/hdfs/folder1
now change users to hdfs and run from the hdfs USER's accessible directory
su hdfs
cd /home/hdfs/folder1
now you can access files as the hdfs user
hdfs dfs -put file1.txt /hdfs_folder1
I try to copy file from local to hadoop file system...
I'm using single node cluster
hduser#jothinathan-VirtualBox:~$ hdfs dfs -mkdir -p /usr/hduser
hduser#jothinathan-VirtualBox:~$ hadoop fs -ls
Found 1 items
drwxr-xr-x - hduser supergroup 0 2015-03-10 18:33 sample
hduser#jothinathan-VirtualBox:~$ cd Documents
hduser#jothinathan-VirtualBox:~/Documents$ ls
file hadoopFIle.txt URICat URICat.java
hduser#jothinathan-VirtualBox:~/Documents$ cd
hduser#jothinathan-VirtualBox:~$ hadoop fs -copyFromLocal /Documents/file /usr/local/hadoop
copyFromLocal: `/usr/local/hadoop': No such file or directory
I am getting this error message, please help me with this problem.
first try this command.
hadoop fs -ls /
if it is listing out the local file system files.(not hdfs),then try
hadoop fs -ls hdfs://IP-ADDRESS-of your-machine/
now copy your file to hdfs by
hadoop fs -copyFromLocal /Documents/file hdfs://Ip-addressofyourmachine/above result path
I have installed hadoop and I can't use -copyFromLocal , it responses
[root#hadoop-master ~]# hadoop fs -copyFromLocal file.dat
copyFromLocal: `.': No such file or directory
I have tryed -mkdir dir but it responses
[root#hadoop-master ~]# hadoop fs -mkdir dir
mkdir: `dir': No such file or directory
and -ls
[root#hadoop-master ~]# hadoop fs -ls
ls: `.': No such file or directory
Only it works when I change my user
su hdfs
hadoop fs -mkdir tfm
but it fails when I try again -copyFromLocal
Any solution?
Try the following
hadoop fs -ls /
hadoop fs -lsr /
hadoop fs -mkdir /dir
hadoop fs -copyFromLocal localfilename /newlocation
HDFS is the Owner of the Hadoop file system so you are able to create directories using HDFS user refer bellow mention commands to create directory or to copy files
sudo -u hdfs hadoop fs -mkdir /path/dir
sudo -u hdfs hadoop fs -copyFromLocal localpath hdfspath
or make sure the user (from whom your are running the command) have needed permissions on the directory you are running the command.
I am getting error while copying files from local file system to hdfs,
will you please help me regarding this,
I am using this command :
hadoopd fs -put text.txt file
put and copyFromLocal command helps you to copy data from your local system to HDFS,provided you have the permission to do so.
hadoop fs -put /path/to/textfile /path/to/hdfs
OR
hadoop dfs -put /path/to/textfile /path/to/hdfs
Comming to your error:
You typed the above command as
hadoopd fs
use
hadoop dfs -put /text.txt /file
hadoop dfs -put /path/to/local/file /path/to/hdfs/file
You can use following command
hadoop fs -copyFromLocal text.txt <path_to_hdfs_directory_where_you_want_to_keep_text.txt>
Without knowing the specific error you are getting, it's difficult to answer. The other responders posted the proper syntax. However, it is not uncommon to see permission issues when attempting to copy files to HDFS.
By default the user and group are typically "hdfs" and "supergroup". Your user account likely doesn't belong to "supergroup" and will get permission denied errors. Try running the command as:
sudo -u hdfs hadoop fs -put /path/to/local/file /path/to/hdfs/file
or
sudo -u hdfs hadoop dfs -put /path/to/local/file /path/to/hdfs/file
You can get around having to do this by changing the ownership and permission of the destination directory on HDFS to be more permissive.
"DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/hduser/myfile could only be replicated to 0 nodes, instead of 1 at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock". From this I thinrk your data node is not running/properly. Check that in cluster UI.Then try
hadoop dfs -put /path/file /hdfs/file (hadoop YARN)
hadoop fs -copyFromLocal /path/file /hdfs/file (hadoop1.x)