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ERROR: Attempting to operate on yarn resourcemanager as root

ERROR: but there is no YARN_RESOURCEMANAGER_USER defined. Aborting operation.

Starting nodemanagers

ERROR: Attempting to operate on yarn nodemanager as root

ERROR: but there is no YARN_NODEMANAGER_USER defined. Aborting operation.

ERROR: Attempting to operate on hdfs namenode as root

ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation.

Starting datanodes

ERROR: Attempting to operate on hdfs datanode as root

ERROR: but there is no HDFS_DATANODE_USER defined. Aborting operation.

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