配置文件应该是这样的
export JAVA_HOME=/usr/local/jdk1.8.0_73
export SCALA_HOME=/home/hadoop/apps/scala
export SPARK_MASTER_IP=hadoop01
export SPARK_MASTER_PORT=7077 ##rpc通信端口，类似hdfs的9000端口，不是50070
export SPARK_WORKER_CORES=2
export SPARK_WORKER_INSTANCES=1
export SPARK_WORKER_MEMORY=1g
export HADOOP_CONF_DIR=/home/hadoop/apps/hadoop-2.7.6/etc/hadoop
