New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

rhadoop giving null key value output #2

Open

Surender1984 opened this issue Aug 19, 2017 · 0 comments

Owner

Surender1984 commented Aug 19, 2017

I have integrated R with Hadoop using RHadoop and running belwo program from R.

library(rmr2)
library(rhdfs)
hdfs.init()
ints = to.dfs(1:100)
calc = mapreduce(input = ints, map = function(k, v) cbind(v, 2*v))
from.dfs(calc)

Map reduce job runs successfully but it's giving null output as below.

$key
NULL

$val
NULL

However it I use the option rmr.options(backend="local") then it's giving proper output.

It will be a great help if you can please help me on this and provide the solution.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment