put: Permission denied: user=XYZ, access=WRITE,
inode="/user/test":hadoopuser:hdfsusers:drwxr-xr-x
This error due to permissions check fails for the directory
/user.test, Whenever changes need for a
file or directory in HDFS do a permissions check for a file or
directory. Hadoop(without security or Kerberos
installation) the identity of a
client process user name is just whatever the host operating syste.
For Unix-like systems, it identify the client username by executing
the command
The user name is the equivalent of
`whoami`;
The group list is the equivalent of
`bash -c groups`.
Super User
The super-user is the user with the
same identity as name node daemon process running. That is the username started the name node
daemon,
If you getting the above error this while copying a file to HDFS
directory
$hadoop fs –put text.txt /user/test/
You(username-XYZ) are copying a file to hdfs directory
“/user/test/”, it owned by hadoopuser in group hdfsusers.
Before hadoop tcommand, export the hadoop user like below
then try
Export HADOOP_USER_NAME=hadoopuser
org.apache.hadoop.ipc.RemoteException:
org.apache.hadoop.security.AccessControlException: Access denied for user hdfs.
Superuser privilege is required
If getting this kind of error in
java programs, before running java jar
$export HADOOP_USER_NAME=hadoopuser OR
Include this lines in your java
program
System.setProperty("HADOOP_USER_NAME", hadoopSuperUserName);
Configuration
conf = new Configuration();
conf.set("hadoop.job.ugi", hadoopSuperUserName);
