load configurations to topology

[jinhong lu]

Hi, I do not understand the order of the configuration loading in submitToplogy:

public static void submitTopologyAs(String name, Map stormConf, StormTopology 
topology, SubmitOptions opts, ProgressListener progressListener, String asUser)
            throws AlreadyAliveException, InvalidTopologyException, 
AuthorizationException {
        if(!Utils.isValidConf(stormConf)) {
            throw new IllegalArgumentException("Storm conf is not valid. Must 
be json-serializable");
        }
        stormConf = new HashMap(stormConf);
        stormConf.putAll(Utils.readCommandLineOpts());
        Map conf = Utils.readStormConfig();
        conf.putAll(stormConf);
        
stormConf.putAll(prepareZookeeperAuthentication(conf));readStormConfig();
        conf.putAll(stormConf);

It seems stormConf load the configuration from user stormConf, then 
commandLine, after that, defaults.yaml and storm.yaml.
Isn’t the yaml files will overwrite the configuration in user stormConf and 
commandLine?

Thanks.