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I still got the same like you. I spent a long long time with red eyes searching for a solution but I can not see. If you know how to deal with that please help me on such issue,
Thank you.
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.
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