private static final int SIG_KILL_EXIT_VALUE = 137;
    private static final List<Integer> EXPECTED_EXIT_CODES = Arrays.asList(
        CliMain.EXIT_SUCCESS,
        CliMain.EXIT_VIOLATION,
        CliMain.EXIT_UNSUPPORTED_JDK
    );
    private static final String JDK_JAR_HELL_MAIN_CLASS = "org.elasticsearch.jdk.JdkJarHellCheck";

    private Set<String> missingClassExcludes = new TreeSet<>();