尝试连接到远程独立Spark安装时出错

Question

我正在尝试此R代码：

library(sparklyr)

sc <- spark_connect(spark_home = "C:/spark-2.4.2-bin-hadoop2.7",
                    master = "spark://VmName:7077")

并收到此错误：

Error in force(code) : 
  Failed while connecting to sparklyr to port (8880) for sessionid (22615): Gateway in localhost:8880 did not respond.
    Path: C:\spark-2.4.2-bin-hadoop2.7\bin\spark-submit2.cmd
    Parameters: --class, sparklyr.Shell, "C:\Users\U1234\Documents\R\win-library\3.5\sparklyr\java\sparklyr-2.3-2.11.jar", 8880, 22615
    Log: C:\Users\U1234\AppData\Local\Temp\RtmpQFwPSV\file39c10f35789_spark.log

有点混乱。为什么代码尝试连接到本地Spark：localhost：8880

有人可以提供有关此无效代码的反馈吗？谢谢！