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org.apache.hadoop.security.AccessControlException: Permission denied: user=app1_K, access=WRITE, inode="/user":hdfs:supergroup:drwxr-xr-x
java.lang.RuntimeException: org.apache.hadoop.security.AccessControlException: Permission denied: user=app1_K, access=WRITE, inode="/user":hdfs:supergroup:drwxr-xr-x	at org.apache.hadoop.hdfs.server.namenode.DefaultAuthorizationProvider.checkFsPermission(DefaultAuthorizationProvider.java:257)	at org.apache.hadoop.hdfs.server.namenode.DefaultAuthorizationProvider.check(DefaultAuthorizationProvider.java:238)	at org.apache.hadoop.hdfs.server.namenode.DefaultAuthorizationProvider.check(DefaultAuthorizationProvider.java:216)