scala 环境配置

export SCALA_HOME=/root/Downloads/spark-2.4.3-bin-hadoop2.7/
export HADOOP_HOME=/root/Downloads/hadoop-2.7.1
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop
SPARK_MASTER_IP=Master
SPARK_LOCAL_DIRS=/root/Downloads/spark-2.4.3-bin-hadoop2.7
SPARK_DRIVER_MEMORY=512M