org.apache.hadoop.security.AccessControlException: Permission denied: user=A

Windows Linux system connected to the Hadoop file system, for there is no question of powers

Solution: There are two

1, inside the main method of the program, the top row is added

System.setProperty("HADOOP_USE_NAEM","user");

2, FileSystem create objects in the file system, indicating that the user

FileSystem fileSystem = FileSystem.get(URI.create("hdfs://hadoop01:9000/") ,conf,"hadoop01");