https://zeppelin.apache.org/docs/0.8.1/interpreter/r.html
I am trying out a basic command as shown in the link above and I get the
following error. Any help will be appreciated.
%spark.r
2+2
java.lang.ClassCastException: scala.Tuple2 cannot be cast to java.lang.Integer
at scala.runtime.BoxesRunTime.unboxToInt(BoxesRunTime.java:101) at
org.apache.spark.SparkRBackend$.init(SparkRBackend.scala:42) at
org.apache.spark.SparkRBackend.init(SparkRBackend.scala) at
org.apache.zeppelin.spark.SparkRInterpreter.open(SparkRInterpreter.java:88) at
org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:69)
at
org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:616)
at org.apache.zeppelin.scheduler.Job.run(Job.java:188) at
org.apache.zeppelin.scheduler.FIFOScheduler$1.run(FIFOScheduler.java:140) at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at
java.util.concurrent.FutureTask.run(FutureTask.java:266) at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Thanks
Arvind
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