by hadoop export JAVA_HOME=/usr/java/latest export HADOOP_HOME_WARN_SUPPRESS=true export HADOOP_HOME=/root/hadoop- #请将改成指定路径 export HADOOP_PREFIX=$HADOOP_HOME export HADOOP_MAP HADOOP_MAPRED_HOME=$HADOOP_HOME export HADOOP_YARN_HOME=$HADOOP_HOME export HADOOP_COMMON_HOME=$HADOOP_HOME export HADOOP_HDFS_HOME=$HADOOP_HOME export YARN_HOME=$HADOOP_HOME export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop OME/etc/hadoop export YARN_CONF_DIR=$HADOOP_HOME/etc/hadoop # Hive export HIVE_HOME=/root/hive export HIVE_CONF_DIR=$HIVE_HOME/conf # HBase export HBASE_HOME=/root/hbase export HBASE_CONF_DIR=$HBASE_HOME/conf

_OPT variable. # There is no default; the JVM will autoscale based upon machine # memory size. # export HADOOP_HEAPSIZE_MAX= # The minimum amount of heap to use (Java -Xms). If no unit # is provided _OPT variable. # There is no default; the JVM will autoscale based upon machine # memory size. # export HADOOP_HEAPSIZE_MIN= HADOOP_NAMENODE_OPTS=-Xmx102400m （2）查看 NameNode 占用内存 [atguigu@hadoop102 ents.html#concept_fzz_dq4_gbb 具体修改：hadoop-env.sh export HDFS_NAMENODE_OPTS="-Dhadoop.security.logger=INFO,RFAS - Xmx1024m" export HDFS_DATANODE_OPTS="-Dhadoop.security.logger=ERROR,RFAS -Xmx1024m"

[atguigu@hadoop102 ~]$ sudo vim /etc/profile.d/my_env.sh 添加如下内容 #JAVA_HOME export JAVA_HOME=/opt/module/jdk1.8.0_212 export PATH=$PATH:$JAVA_HOME/bin （2）保存后退出 :wq （3）source 一下/etc/profile 文件，让新的环境变量 人工智能资料下载，可百度访问：尚硅谷官网 ➢ 在 my_env.sh 文件末尾添加如下内容：（shift+g） #HADOOP_HOME export HADOOP_HOME=/opt/module/hadoop-3.1.3 export PATH=$PATH:$HADOOP_HOME/bin export PATH=$PATH:$HADOOP_HOME/sbin ➢ 保存并退出： :wq （3）让修改后的文件生效

hadoop-env.sh 修改 JAVA_HOME: export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-arm64 银河麒麟服务器操作系统 V4 hadoop 软件适配手册 5 2.2.2 配置 yarn-env.sh $ vim yarn-env.sh 修改: export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-arm64