@Override
  public void initClusterKey() {
    if (encrypt != null) {
      try {
        logger.info("Initializing cluster key");
        encrypt.initClusterSecretKey();
      } catch (Exception e) {
        throw new RuntimeException("unable to create cluster key ", e);
      }
    }
  }
returns the handler that should process the given message. The default handler is the
membership manager
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/messenger/JGroupsMessenger.java