设置了一个值为config.getServers()
//…
quorumPeer.setQuorumPeers(config.getServers());
//…
config这个配置信息又是通过在initializeAndRun方法中初始化的,
protected void initializeAndRun(String[] args) throws ConfigException, IOException {
QuorumPeerConfig config = new QuorumPeerConfig();
if (args.length == 1) {
config.parse(args[0]);
}