How can I activate rJava on macOS?

Question

> 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 '/Library/Frameworks/R.framework/Versions/3.4/Resources/library/rJava/libs/rJava.so':
  dlopen(/Library/Frameworks/R.framework/Versions/3.4/Resources/library/rJava/libs/rJava.so, 6): Library not loaded: @rpath/libjvm.dylib
  Referenced from: /Library/Frameworks/R.framework/Versions/3.4/Resources/library/rJava/libs/rJava.so
  Reason: image not found

I installed JDK9 version on my Macbook Pro

My OS is 10.12.6 Sierra

I tried to activate rJava many times.

I searched Google a lot.. but I could not solve that problem..

Try the solution described here: https://github.com/snowflakedb/dplyr-snowflakedb/wiki/Configuring-R-rJava-RJDBC-on-Mac-OS-X — Disclaimer: I have no idea whether this is related to your problem, or if it will work. Short version: after installing Java, run `R CMD javareconf` in the command line, *then* reinstall the `rJava` package from source. — Konrad Rudolph, Oct 26 '17 at 08:33
Have you looked and followed advice [here](https://stackoverflow.com/questions/30738974/rjava-load-error-in-rstudio-r-after-upgrading-to-osx-yosemite) and [here](https://stackoverflow.com/questions/44081227/trouble-installing-and-loading-rjava-on-mac-el-capitan)? — Maurits Evers, Oct 26 '17 at 08:34

score 0 · Answer 1 · answered Oct 29 '17 at 15:01

There are numerous issues you may find here.

incorrect rJava package
issues with JVM configuration
problems related to package sources (you need most recent release of clang to compile most recent version of rJava)
there are issues with R and it's configuration utility for JVM configuration.

In general, there is no easy solution you can apply for each and every environment. Take a look here:

http://www.owsiak.org/r-3-4-rjava-macos-and-even-more-mess/

I have collected sources of most of the issues you can find while working with JVM and R. Also, pay attention to JDK 9 - it no longer comes with JRE. In past, JRE was internal part of JDK.

In general, I don't think you can solve this issue without, at least, little bit of work.

For all the helping people with comments: "This link may provide ...". Just take a look at the content and you will know why I don't copy-paste it here ;)

How can I activate rJava on macOS?

1 Answers1