Starting today, I am getting errors about missing Javac on CI runs, e.g.:
https://integration.wikimedia.org/ci/job/wikidata-query-rdf/494/console
23:10:32 [ERROR] COMPILATION ERROR :
23:10:32 [INFO] -------------------------------------------------------------
23:10:32 [ERROR] Unable to locate the Javac Compiler in:
23:10:32 /usr/lib/jvm/java-7-openjdk-amd64/jre/../lib/tools.jar
23:10:32 Please ensure you are using JDK 1.4 or above and
23:10:32 not a JRE (the com.sun.tools.javac.Main class is required).
23:10:32 In most cases you can change the location of your Java
23:10:32 installation by setting the JAVA_HOME environment variable.