摘要:
在运行spark的测试程序SparkPi时,点击运行,出现了如下错误: Exception in thread "main" org.apache.spark.SparkException: A master URL must be set in your configuration at or... 阅读全文
摘要:
执行两个命令: update-alternatives --install /usr/bin/java java /usr/java/jdk1.7.0_72/bin/java 1888 update-alternatives --config java 阅读全文