apollo-client/src/main/java/com/ctrip/framework/apollo/internals/AbstractConfig.java/AbstractConfig/clearConfigCache
class AbstractConfig:  protected void clearConfigCache() {
    synchronized (this) {
      for (Cache c : allCaches) {
        if (c != null) {
          c.invalidateAll();
        }
      }
      m_configVersion.incrementAndGet();
    }
  }