JAVA, SCALA, HADOOP, SPARK里的JAVA_HOME和环境变量设置

/etc/profile里添加的内容：

export JAVA_HOME=/jdk
export HADOOP_HOME=/hadoop
export SCALA_HOME=/scala
export SPARK_HOME=/spark
export PATH=$PATH:$JAVA_HOME/bin
export PATH=$PATH:$SPARK_HOME/bin
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$SCALA_HOME/bin
export PATH=$PATH:$SPARK_HOME/sbin
export CLASSPATH=.:$JAVA_HOME/lib

 

/jdk为jdk的安装目录，/hadoop为hadoop的安装目录，/scala为scala的安装目录，/spark为spark的安装目录。

hadoop里需要添加的JAVA_HOME

    hadoop文件夹下的/etc/hadoop/hadoop-env.sh

        export JAVA_HOME=/jdk

spark里需要添加的JAVA_HOME

    spark文件夹下的sbin/spark-config.sh

         export JAVA_HOME=/jdk

    spark文件夹下的conf/spark-env.sh

        export JAVA_HOME=/jdk

        export SCALA_HOME=/scala

        export HADOOP_HOME=/hadoop