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Hey Mac OSX users with Java 1.8 installed. Did R just request a Java 1.6 installation and then promptly crash your session?  If so, read on…

### The Problem

A few days ago I was attempting to use the mallet package for topic models and I found that typing

> library(mallet)


caused two things to happen:

2. The R session crashes (regardless of what I did about the dialog)

This seems to be a general problem for packages that depends on the rJava package.

I’m running the latest Mac OSX (Yosemite 10.10.1) and have installed the latest Java

$java -version java version "1.8.0" Java(TM) SE Runtime Environment (build 1.8.0-b132) Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode)  and the latest R $ R --version
R version 3.1.2 (2014-10-31) -- "Pumpkin Helmet"
Copyright (C) 2014 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin13.4.0 (64-bit)


But for some reason with R, it’s Java 1.6 (which is no longer even being updated) or bust.

### The fix (maybe)

The trail of bug reports starts here, but before you delve into those and bother Simon Urbanek as much as I did, try the following:

2. Reconfigure your R installation by typing
sudo R CMD javareconf -n

in a Terminal window

3. Trigger a recompile by reinstalling rJava by typing
install.packages('rJava', type='source')

Now if you relauch R and load your package it should use your shiny new Java 1.8 and not crash any R sessions.