question: public void processConfigMessages ( ) { List < String > keysToProcess = new LinkedList < > ( ) ; keysToProcess . add ( YARN_CONTAINER_COUNT_OPT ) ; keysToProcess . add ( SERVER_URL_OPT ) ; processConfigMessages ( keysToProcess ) ; }
target:  This function reads all the messages with "set-config" type added to the coordinator stream since the last time the method was invoked