RHadoop integration isssues

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installaing RHadoop package for working with R and Hadoop

Installing rjava package in R

install.packages("rJava_0.9-7.tar.gz", repos = NULL)

Error

configure: error: Java Development Kit (JDK) is missing or not registered in R Make sure R is configured with full Java support (including JDK). Run R CMD javareconf as root to add Java support to R. If you don't have root privileges, run R CMD javareconf -e to set all Java-related variables and then install rJava. ERROR: configuration failed for package 'rJava' * removing '/home/bdalab/R/x86_64-pc-linux-gnu-library/3.1/rJava'

Solution

install

sudo apt-get install r-cran-rjava

then try again. I have installed succefully in my system. still I got above error, then i checked java -version it was pointing out to openJDK instaed of Oracle java HotSpot. changed to HotSpot.

Error

library(rJava) 
##only in RStudio, In terminal its working fine.

Error : .onLoad failed in loadNamespace() 
for 'rJava', details:
  call: dyn.load(file, DLLpath = DLLpath, ...)
  error: unable to load shared object
 'x86_64-pc-linux-gnu-library/3.1/rJava/libs/rJava.so':
  libjvm.so: cannot open shared object file:
 No such file or directory
Error: loading failed
Execution halted
ERROR: loading failed

Solution

install

sudo apt-get install r-cran-rjava

Solution

locate libjvm.so and make shared link, sudo ln -s /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/server/libjvm.so /usr/lib/

Error

R CMD javareconf

/usr/lib/R/bin/javareconf: 405: 
/usr/lib/R/bin/javareconf: cannot create
 /usr/lib/R/etc/Makeconf.new: Permission denied

Solution

sudo -i R CMD javareconf

OR

R CMD javareconf JAVA=jdk1.8.0_60/jre/bin/java JAVA_HOME=jdk1.8.0_60/ JAVAC=jdk1.8.0_60/bin/javac JAR=jdk1.8.0_60/bin/jar JAVAH=jdk1.8.0_60/bin/javah

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