protected String prepareStopCommand(Duration timeout) {
        long rpcTimeoutSeconds = timeout.toSeconds() + 10;
        String rpcParams = "-t " + rpcTimeoutSeconds + " tcp/localhost:" + getRpcPort() + " prepareStop d:" + timeout.toSeconds();
        return getDefaults().underVespaHome("bin/vespa-rpc-invoke") + " " + rpcParams;
    }
Returns the jvm args set explicitly for this node
config-model/src/main/java/com/yahoo/vespa/model/container/Container.java