【已解决】ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation. Starting datanodes

export HDFS_NAMENODE_USER=root
export HDFS_DATANODE_USER=root
export HDFS_SECONDARYNAMENODE_USER=root
export YARN_RESOURCEMANAGER_USER=root
export YARN_NODEMANAGER_USER=root