一、使用root用户启动hadoop-3.1.3报错

1.1 ERROR: Attempting to operate on hdfs namenode as root

[root@hadoop100 sbin]# ./start-dfs.sh
Starting namenodes on [hadoop100]
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 [hadoop102]
ERROR: Attempting to operate on hdfs secondarynamenode as root
ERROR: but there is no HDFS_SECONDARYNAMENODE_USER defined. Aborting operation.

在start-dfs.sh，stop-dfs.sh两个文件顶部添加以下参数

#!/usr/bin/env bash
HDFS_DATANODE_USER=root
HADOOP_SECURE_DN_USER=hdfs
HDFS_NAMENODE_USER=root
HDFS_SECONDARYNAMENODE_USER=root

start-yarn.sh，stop-yarn.sh顶部也需添加以下参数

#!/usr/bin/env bash
YARN_RESOURCEMANAGER_USER=root
HADOOP_SECURE_DN_USER=yarn
YARN_NODEMANAGER_USER=root

修改完之后解决。

1.2 JAVA_HOME is not set and could not be found

JAVA_HOME是有设置的，echo $JAVA_HOME有显示，应该是要在hadoop中显式添加JAVA_HOME

cd /usr/loca/hadoop-3.1.3
vi etc/hadoop/hadoop-env.sh
export JAVA_HOME=                   ##这里将JAVA_HOME填入

启动成功

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ERROR: Attempting to operate on hdfs namenode as root

文章目录

一、使用root用户启动hadoop-3.1.3报错

1.1 ERROR: Attempting to operate on hdfs namenode as root

1.2 JAVA_HOME is not set and could not be found

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