Thanks Shivaram,
This was the issue. Now I have installed Rscript on all the nodes in Spark
cluster and it works now bith from script as well as R prompt.
Thanks
Stuti Awasthi
From: Shivaram Venkataraman [mailto:shiva...@eecs.berkeley.edu]
Sent: Tuesday, August 19, 2014 1:17 PM
To: Stuti Awasthi
Cc: user@spark.apache.org
Subject: Re: Cannot run program "Rscript" using SparkR
Hi Stuti
Could you check if Rscript is installed on all of the worker machines in the
Spark cluster ? You can ssh into the machines and check if Rscript can be found
in $PATH.
Thanks
Shivaram
On Mon, Aug 18, 2014 at 10:05 PM, Stuti Awasthi
mailto:stutiawas...@hcl.com>> wrote:
Hi All,
I am using R 3.1 and Spark 0.9 and installed SparkR successfully. Now when I
execute the “pi.R” example using spark master as local, then script executes
fine.
But when I try to execute same example using master as spark cluster master,
then in throws Rcript error.
Error :
java.io.IOException: Cannot run program "Rscript": java.io.IOException:
error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:475)
at edu.berkeley.cs.amplab.sparkr.RRDD.compute(RRDD.scala:113)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:241)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:232)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:109)
at org.apache.spark.scheduler.Task.run(Task.scala:53)
at
org.apache.spark.executor.Executor$TaskRunner$$anonfun$run$1.apply$mcV$sp(Executor.scala:213)
at
org.apache.spark.deploy.SparkHadoopUtil$$anon$1.run(SparkHadoopUtil.scala:46)
at
org.apache.spark.deploy.SparkHadoopUtil$$anon$1.run(SparkHadoopUtil.scala:45)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:416)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
at
org.apache.spark.deploy.SparkHadoopUtil.runAsUser(SparkHadoopUtil.scala:45)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:178)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:679)
I have checked, Rscript is present in my system and I also exported it in
CLASSPATH and PATH variables. Script is given the permission 777 as there are
multiple users of the clusters.
$ which Rscript
/usr/local/bin/Rscript
$ type -a Rscript
Rscript is /usr/local/bin/Rscript
$ echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/var/local/maven3/bin/:/var/local/ant/bin/:/usr/lib/jvm/java-6-openjdk:/usr/local/bin/Rscript
$ echo $CLASSPATH
:/usr/local/bin/Rscript
Also I am getting same error if I open R prompt and then execute the commands
one after another OR if I execute the script.
Please suggest
Thanks
Stuti Awasthi
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