error: unable to load installed packages just now

Question

When I tried to run the R console in Eclipse, I got this error:

....Please make sure that R package \'rj\' (1.1 or compatible) is installed...

Answer 1

I did the following and it worked for me:

export LD_LIBRARY_PATH=$JAVA_LD_LIBRARY_PATH
sudo R CMD javareconf

I had to restart R then as well.

Answer 2

This fixes the LD_LIBRARY_PATH problem for me (Linux, Debian 7.1.0, tc-shell, R version 3.0.2):

Add this line to .cshrc:

setenv LD_LIBRARY_PATH $JAVA_HOME/jre/lib/amd64:$JAVA_HOME/jre/lib/amd64/server

Adding this command to ~/.login was not enough; the environment variable LD_LIBRARY_PATH was still not known in new xterms: echo $LD_LIBRARY_PATH : LD_LIBRARY_PATH: Undefined variable. (Why??)

Curiously, when starting R as superuser, there was no problem with finding libjvm.so .

Answer 3

I did not had the jdk installed which I could fix with sudo apt-get install jdk-* After that i could run the sudo R CMD javareconf which always drew an error message before. Everything was set correctly and no manual tweeks where required, and after that package installation ran smootly in R (restart required).

Answer 4

or just set the library in R?

I just ran this command in R:

Sys.setenv(JAVA_HOME='/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/server')

(replace "/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/server" with your Java library path which can be found running "sudo R CMD javareconf")

Might not be the most elegant solution - but it worked for me!

Answer 5

I got similar issue and was able to resolve it by running

R CMD javareconf -e

Output of the R CMD javareconf -e

Java interpreter : /export/apps/jdk/JDK-1_6_0_27/jre/bin/java
Java version     : 1.6.0_27
Java home path   : /export/apps/jdk/JDK-1_6_0_27
Java compiler    : /export/apps/jdk/JDK-1_6_0_27/bin/javac
Java headers gen.: /export/apps/jdk/JDK-1_6_0_27/bin/javah
Java archive tool: /export/apps/jdk/JDK-1_6_0_27/bin/jar
Java library path: /export/apps/jdk/JDK-1_6_0_27/jre/lib/amd64/server:/export/apps/jdk/JDK-1_6_0_27/jre/lib/amd64:/export/apps/jdk/JDK-1_6_0_27/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
JNI linker flags : -L/export/apps/jdk/JDK-1_6_0_27/jre/lib/amd64/server -L/export/apps/jdk/JDK-1_6_0_27/jre/lib/amd64 -L/export/apps/jdk/JDK-1_6_0_27/jre/../lib/amd64 -L/usr/java/packages/lib/amd64 -L/usr/lib64 -L/lib64 -L/lib -L/usr/lib -ljvm
JNI cpp flags    : -I/export/apps/jdk/JDK-1_6_0_27/include -I/export/apps/jdk/JDK-1_6_0_27/include/linux

The following Java variables have been exported:
JAVA_HOME JAVA JAVAC JAVAH JAR JAVA_LIBS JAVA_CPPFLAGS JAVA_LD_LIBRARY_PATH
Running: /bin/bash

After setting LD_LIBRARY_PATH to the same value as JAVA_LD_LIBRARY_PATH as shown in the output above. I was able to install rj.

export LD_LIBRARY_PATH=/export/apps/jdk/JDK-1_6_0_27/jre/lib/amd64/server:/export/apps/jdk/JDK-1_6_0_27/jre/lib/amd64:/export/apps/jdk/JDK-1_6_0_27/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib

Run R and then install rj by

install.packages(c("rj", "rj.gd"), repos="http://download.walware.de/rj-1.1")

Answer 6

None of the above worked for me, the only solution that installed rJava on Linux Ubuntu without any problems was to pass RScript command after installation of the base R:

$ sudo Rscript -e 'install.packages("rJava", repos = "http://cran.r-project.org/")'