Dear Arshad,

We hope you are  doing good.

You might be receiving this error as the parameters HADOOP_CMD, HADOOP_STREAMING are not set.

To overcome this error,  please issue the below command in R command prompt of terminal.

Command: Sys.setenv(HADOOP_CMD="/path/to/hadoop/bin/hadoop")
Command: Sys.setenv(HADOOP_STREAMING="path/to/hadoop-streaming.jar")

E.g: In my system I have hadoop-1.2.0 installed in /home/user/hadoop-1.2.0 then the commands would be 


In my system I have hadoop-2.2.0 installed in /usr/lib/hadoop-2.2.0 then the commands would be 


Based on the version of hadoop installed on your system, set the above parameters in R and then try to run R-Hadoop comands.

If you are still facing the same issue, can you try by running the below simple  MR job in R and check if it is working fine.

ints = to.dfs(1:100)
calc = mapreduce(input = ints, map = function(k, v) cbind(v, 2*v))

Please try it and let me know if this works for you.

Waiting for your response.
Please let us know if you need any further help, we will be glad to assist you.

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