Deadlock when dozens of services registry to redis server

当注册十数个以上服务到redis注册中心时，存在很大概率的死锁，程序未能完成所有服务的注册。

com.alibaba.dubbo.registry.redis.RedisRegistry

    @Override
    public void doRegister(URL url) {
        String key = toCategoryPath(url);
        String value = url.toFullString();
        String expire = String.valueOf(System.currentTimeMillis() + expirePeriod);
        boolean success = false;
        RpcException exception = null;
        for (Map.Entry<String, JedisPool> entry : jedisPools.entrySet()) {
            JedisPool jedisPool = entry.getValue();
            try {
                Jedis jedis = jedisPool.getResource(); //  **HERE! 卡在这里，jedis资源耗尽了？**
                try {
                    jedis.hset(key, value, expire);
                    jedis.publish(key, Constants.REGISTER);
                    success = true;
                    if (!replicate) {
                        break; //  If the server side has synchronized data, just write a single machine
                    }
                } finally {
                    jedis.close();
                }
            } catch (Throwable t) {
                exception = new RpcException("Failed to register service to redis registry. registry: " + entry.getKey() + ", service: " + url + ", cause: " + t.getMessage(), t);
            }
        }
        if (exception != null) {
            if (success) {
                logger.warn(exception.getMessage(), exception);
            } else {
                throw exception;
            }
        }
    }

[the3rd]

确实，当我将max.total设置成100时，就好了。 但是我不理解为什么需要这么多！

ps. 用Redission换掉Jedis怎么样，redis各类集群基本都支持了

[beiwei30]

I think the reason is just like what you said, the resource pool get exhausted, and max.total does the trick.