+ bin/isabelle components -a ### Missing Isabelle component: "/media/data/jenkins/.isabelle/contrib/jdk-17.0.2+8" Unknown JAVA_HOME -- Java unavailable Getting "https://isabelle.sketis.net/components/jdk-17.0.2+8.tar.gz" Unpacking "/media/data/jenkins/.isabelle/contrib/jdk-17.0.2+8.tar.gz"