Setting the Runtime Java Environment
The version of Java used to compile REEF is controlled in the Maven pom.xml file in the build plugins section under the maven-compiler-plugin artifact identifier. In order to run REEF applications, you must set the JAVA_HOME environment variable to the correct Java installation directory for your operating system and java version.
Linux
On a number of Linux distributions such as Ubuntu, the current active version of Java is controlled via links from /usr/bin set by the update-alternatives command; thus, the value of JAVA_HOME that causes REEF to use the Java version controlled by update-alternatives is given in the code block below. REEF will concatenate the appropriate path to find executable files.
bash script to set JAVA_HOME
export JAVA_HOME= /usr |
You can change the active version of Java controlled by update-alternatives by entering the command below and selecting the desired version from the displayed list.
bash script to list all installed Java versions on Linux
update-alternatives --config java |