RserveException : eval failed when running R on Databricks

我对 R 没有任何经验，我试图在 Databricks 笔记本中与 Spark 一起使用它来分析一些数据。

我遵循了这里的教程 http://people.apache.org/~pwendell/spark-releases/latest/sparkr.html

到目前为止，我有这个代码:

sparkR.stop() 
sc <- sparkR.init() 
sqlContext <- sparkRSQL.init(sc) 
 
df <- createDataFrame(sqlContext, '/FileStore/tables/boanf7gu1466936449434/german.data') 

RserveException: eval failed, request status: error code: 127 
org.rosuda.REngine.Rserve.RserveException: eval failed, request status: error code: 127 
    at org.rosuda.REngine.Rserve.RConnection.eval(RConnection.java:234) 
    at com.databricks.backend.daemon.driver.RShell.setJobGroup(RShell.scala:202) 
    at com.databricks.backend.daemon.driver.RDriverLocal.setJobGroup(RDriverLocal.scala:150) 
    at com.databricks.backend.daemon.driver.DriverLocal.execute(DriverLocal.scala:125) 
    at com.databricks.backend.daemon.driver.DriverWrapper$$anonfun$3.apply(DriverWrapper.scala:483) 
    at com.databricks.backend.daemon.driver.DriverWrapper$$anonfun$3.apply(DriverWrapper.scala:483) 
    at scala.util.Try$.apply(Try.scala:161) 
    at com.databricks.backend.daemon.driver.DriverWrapper.executeCommand(DriverWrapper.scala:480) 
    at com.databricks.backend.daemon.driver.DriverWrapper.runInner(DriverWrapper.scala:381) 
    at com.databricks.backend.daemon.driver.DriverWrapper.run(DriverWrapper.scala:212) 
    at java.lang.Thread.run(Thread.java:745) 

请您参考如下方法:

在 DataBricks 中，已经有一个 spark 实例在运行。所以，你不想阻止它。

sparkR.stop() #This line of your code stops the existing spark instance.  
sc <- sparkR.init()  #You also don't need this to start a spark instance because you already have one. 
sqlContext <- sparkRSQL.init(sc) 

spark_table <- SparkR::read.df(path = '/FileStore/tables/boanf7gu1466936449434/german.data', schema = NULL, na.strings = "NA") 
r_table <- SparkR::as.data.frame(spark_table)