启动HDFS时候出现Attempting to operate on hdfs namenode as root
在启动HDFS执行sbin/start-dfs.sh的时候出现如下问题
[root@node01 hadoop]# sbin/start-dfs.sh
Starting namenodes on [node01]
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.
Starting secondary namenodes [node03]
ERROR: Attempting to operate on hdfs secondarynamenode as root
ERROR: but there is no HDFS_SECONDARYNAMENODE_USER defined. Aborting operation
.解决方案需要修改start-dfs.sh和stop-dfs.sh脚本(两个脚本在/hadoop/sbin路径下)下,在这两个脚本中添加如下内容,然后发送脚本到全部hadoop节点上
HDFS_DATANODE_USER=root
HADOOP_SECURE_DN_USER=hdfs
HDFS_NAMENODE_USER=root
HDFS_SECONDARYNAMENODE_USER=root
添加完后再次执行start-dfs.sh即可
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