MAPREDUCE服务 MRS-执行balance常见问题定位方法:问题1：报没权限（Access denied）执行balance

时间：2024-08-27 10:23:52

MAPREDUCE服务 MRS

问题1：报没权限（Access denied）执行balance

问题详细：执行start-balancer.sh，“hadoop-root-balancer-主机名.out”日志显示“Access denied for user test1. Superuser privilege is required”

 
cat /opt/client/HDFS/hadoop/logs/hadoop-root-balancer-host2.out
Time Stamp               Iteration#  Bytes Already Moved  Bytes Left To Move  Bytes Being Moved
INFO: Watching file:/opt/client/HDFS/hadoop/etc/hadoop/log4j.properties for changes with interval : 60000
org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.AccessControlException): Access denied for user test1. 
Superuser privilege is required
at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkSuperuserPrivilege(FSPermissionChecker.java:122)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkSuperuserPrivilege(FSNamesystem.java:5916)

问题根因：

执行balance需要使用管理员账户

解决方法