本篇博客参照hadoop官网,介绍HDFS的NN及DN,副本存放机制(机架感知策略),安全模式,文件系统元数据持久化(editlog,fsimage),HDFS健壮性,数据组织及存储空间的回收,重点介绍DataNode及NameNode及机架感知策略
本篇博客参照hadoop官网,介绍HDFS的NN及DN,副本存放机制(机架感知策略),安全模式,文件系统元数据持久化(editlog,fsimage),HDFS健壮性,数据组织及存储空间的回收,重点介绍DataNode及NameNode及机架感知策略
其中一个问题是报but there is no HDFS_NAMENODE_USER defined. Aborting operation. Starting datanodes 直接解决 在Hadoop安装目录下找到sbin文件夹 在里面修改四个文件 1、对于start-dfs.sh和stop-dfs.sh文件,...
本来Hadoop好好的,但是刚才启动突然报错,而且每一个节点都报错。原因是使用了root用户启动hadoop导致的。切换回hadoop用户据即可解决。
同时解决了jps没有Namenode问题。
在Hadoop全分布构建中,常常会出现以下错误 [root@Hadoopc1 hadoop]# start-all.sh ...ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation. Starting datanodes ERROR..
ERROR: Attempting to operate on hdfs namenode as root ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation
(1)第一次启动 NameNode 格式化后,创建 fsimage 和 edits 文件 (2)客户端对元数据进行增删改的请求 (3)NameNode 记录操作
在hadoop安装目录下的sbin目录,分别修改/start-dfs.sh /stop-dfs.sh /start-yarn.sh /stop-yarn.sh 修改文件内容最好要加在文件内#!/usr/bin/env bash下 ...HDFS_DATANODE_USER=root HADOOP_SEC...
ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation. Starting datanodes 错误描述: Starting namenodes on [localhost] ERROR: Attempting to operate on hdfs namenode as root ERROR: but...
ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation.
一、问题信息:ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation 二、解决方法 在Hadoop安装目录下找到sbin文件夹,修改里面的四个文件 1、对于start-dfs.sh和stop-dfs.sh文件,添加...
问题描述 [root@localhost sbin]# start-dfs.sh Starting namenodes on [localhost....ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation. Starting datanodes ERROR: Attempting to ope
因为没有新建hadoop用户而直接用root...export HDFS_NAMENODE_USER=root export HDFS_DATANODE_USER=root export HDFS_SECONDARYNAMENODE_USER=root export YARN_RESOURCEMANAGER_USER=root export YARN_NODEMANAGE..
一、详细报错信息 [root@hadoop101 hadoop-3.1.3]# sbin/start-dfs.sh Starting namenodes on ...ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation. Starting datanodes ERROR: Attempting to
今天启动集群的时候报了一个错误,看一下 [root@hadloop2 hadoop-3.3.0]# sbin/start-dfs.sh ...ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation. Starting datanodes ERROR: Att.
在Hadoop安装目录下找到sbin文件夹,修改里面的四个文件。
错误描述: [root@nna hadoop-3.2.2]# start-dfs.sh Starting namenodes on [nna nns] ERROR: Attempting to operate on hdfs namenode ...ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operatio...
Hadoop常见问题2 Attempting to operate on hdfs namenode as root but there is no HDFS_NAMENODE_USER define
纯手动搭建hadoop3.x集群记录004_群起集群并测试_解决启动中问题_并补充Linux环境---大数据之Hadoop3.x工作笔记0167。在JAVA_HOME的地方,这里指定jdk的位置就可以了,安装在哪里就指定哪里。/usr/bin/env bash 放到...
问题: ERROR: Attempting to operate on hdfs namenode as...ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation. Starting datanodes ERROR: Attempting to operate on hdfs datanode as roo...
错误描述: [root@nna hadoop-3.2.0]# start-dfs.sh Starting namenodes on [nna nns] ERROR: Attempting to operate on hdfs namenode ...ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operatio...
报错: Starting namenodes on ...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