Maven error :Perhaps you are running on a JRE rather than a JDK?

Maven error :Perhaps you are running on a JRE rather than a JDK?

  2:38 AM    Dexter

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I've been facing the same issue with java 8 (ubuntu 16.04), trying to compile using mvn command line.
I verified my $JAVA_HOME, java -version and mvn -version. Everything seems to be okay pointing to /usr/lib/jvm/java-8-openjdk-amd64.
It appears that java-8-openjdk-amd64 is not completly installed by default and only contains the JRE (despite its name "jdk").
Re-installing the JDK did the trick.

sudo apt-get install openjdk-8-jdk