Spark Initial job has not accepted any resources; check your cluster UI to ensure that workers are registered and have sufficient memory

环境：spark 1.1

spark-shell启用的时候一直出现这个提示：

Initial job has not accepted any resources; check your cluster UI to ensure that workers are registered and have sufficient memory

查了一下午才明白，需要在master结点上做如下修改：

vi /etc/spark/conf/spark-defaults.conf

添加一项

spark.driver.memory=10g

注：spark.driver.memory表示master的memory大小设置， 而spark.executor.memory代表worker结点内存大小。