qq_42400267的博客

连接socket的时一定要把url对上：我的127.0.0.1就是localhost如果tomcat配置的是那这里也要改成

idea运行代码时出现解决：在.idea文件夹里的workspace.xml中的标签下添加：<property name="dynamic.classpath" value="true" />

编译代码object homework01 { def main(args: Array[String]): Unit = { val conf = new SparkConf().setAppName("ch2homework01").setMaster("local[4]") val sc = new SparkContext(conf) val sp...

读取hdfs集群的文件val file=sc.textFile("/data/wordcount.txt")不能写成：val file=sc.textFile(“hdfs:IP地址///data/wordcount.txt”)读取本机文件val file=sc.textFile(“file:///data/wordcount.txt”)...