apollo-core/src/main/java/com/ctrip/framework/apollo/core/utils/ApolloThreadFactory.java/ApolloThreadFactory/newThread
class ApolloThreadFactory:  public Thread newThread(Runnable runnable) {
    Thread thread = new Thread(threadGroup, runnable,//
        threadGroup.getName() + "-" + namePrefix + "-" + threadNumber.getAndIncrement());
    thread.setDaemon(daemon);
    if (thread.getPriority() != Thread.NORM_PRIORITY) {
      thread.setPriority(Thread.NORM_PRIORITY);
    }
    return thread;
  }