rJava missing library issue.

[mxshiv]

While trying to load rJava from the Workbench IDE, it complains of missing library. I have already installed the pre-requisite Linux rpms but the issue persists. Can you please suggest? Many thanks.

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Error:

library("rJava")
Error: package or namespace load failed for ‘rJava’:
.onLoad failed in loadNamespace() for 'rJava', details:
call: dyn.load(file, DLLpath = DLLpath, ...)
error: unable to load shared object '/home/mxshiv/R/x86_64-pc-linux-gnu-library/4.2/rJava/libs/rJava.so':
libjvm.so: cannot open shared object file: No such file or directory
packageVersion("rJava")
[1] ‘1.0.6’

======================================

Package Details:

rpm -qa| egrep "make|java-1.8.0-openjdk-devel"

automake-1.16.1-7.el8.noarch
make-4.2.1-11.el8.x86_64
cmake-filesystem-3.20.2-4.el8.x86_64
texlive-makecmds-20180414-25.el8.noarch
java-1.8.0-openjdk-devel-1.8.0.345.b01-5.el8.x86_64
texlive-makeindex-20180414-25.el8.x86_64

R CMD javareconf

Java interpreter : /usr/bin/java
Java version : 1.8.0_345
Java home path : /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.345.b01-5.el8.x86_64/jre
Java compiler : /usr/bin/javac
Java headers gen.: /usr/bin/javah
Java archive tool: /usr/bin/jar

trying to compile and link a JNI program
detected JNI cpp flags : -I$(JAVA_HOME)/../include -I$(JAVA_HOME)/../include/linux
detected JNI linker flags : -L$(JAVA_HOME)/lib/amd64/server -ljvm
gcc -I"/opt/R/4.2.1/lib/R/include" -DNDEBUG -I/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.345.b01-5.el8.x86_64/jre/../include -I/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.345.b01-5.el8.x86_64/jre/../include/linux -I/usr/local/include -fpic -g -O2 -c conftest.c -o conftest.o
gcc -shared -L/opt/R/4.2.1/lib/R/lib -L/usr/local/lib -o conftest.so conftest.o -L/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.345.b01-5.el8.x86_64/jre/lib/amd64/server -ljvm -L/opt/R/4.2.1/lib/R/lib -lR

JAVA_HOME : /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.345.b01-5.el8.x86_64/jre
Java library path: $(JAVA_HOME)/lib/amd64/server
JNI cpp flags : -I$(JAVA_HOME)/../include -I$(JAVA_HOME)/../include/linux
JNI linker flags : -L$(JAVA_HOME)/lib/amd64/server -ljvm
Updating Java configuration in /opt/R/4.2.1/lib/R
Done.

locate libjvm.so

/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.345.b01-5.el8.x86_64/jre/lib/amd64/server/libjvm.so

[michaelmayer2]

I am aware that this is already 2 years old, but if you follow https://solutions.posit.co/envs-pkgs/using-rjava/index.html#additional-steps-for-workbench you will get rJava working in the RStudio IDE. The trick is to load the ldpaths file for each R version explicitly as described in the link.