JedisCluster : redis.clients.jedis.exceptions.JedisNoReachableClusterNodeException: No reachable node in cluster

I was trying to connect to JedisCluster (ElastiCache Redis) from java. But I was getting JedisConnectionException with No reachable node in the cluster.

Here was my code to connect to JedisCluster

public static void main(String[] args) throws IOException{
        final GenericObjectPoolConfig poolConfig = new GenericObjectPoolConfig();
        poolConfig.setMaxWaitMillis(2000);
        poolConfig.setMaxTotal(300);
        Set<HostAndPort> jedisClusterNode = new HashSet<HostAndPort>();
        jedisClusterNode.add(new HostAndPort("mycachecluster.eaogs8.0001.usw2.cache.amazonaws.com",6379));
        jedisClusterNode.add(new HostAndPort("mycachecluster.eaogs8.0002.usw2.cache.amazonaws.com",6379));
        JedisCluster jedisCluster = new JedisCluster(jedisClusterNode,poolConfig);
        System.out.println("Cluster Size...." + jedisCluster.getClusterNodes().size());
        try{
            jedisCluster.set("foo", "bar");
            jedisCluster.get("foo");
        }
        catch(Exception e){
            e.printStackTrace();
        }
        finally{
            jedisCluster.close();
        }
    }

The exception I got after running this

redis.clients.jedis.exceptions.JedisNoReachableClusterNodeException: No reachable node in cluster
    at redis.clients.jedis.JedisSlotBasedConnectionHandler.getConnection(JedisSlotBasedConnectionHandler.java:57)
    at redis.clients.jedis.JedisSlotBasedConnectionHandler.getConnectionFromSlot(JedisSlotBasedConnectionHandler.java:74)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:116)
    at redis.clients.jedis.JedisClusterCommand.run(JedisClusterCommand.java:31)
    at redis.clients.jedis.JedisCluster.set(JedisCluster.java:103)

I have checked

telnet mycachecluster.eaogs8.0001.usw2.cache.amazonaws.com 6379

as mentioned in AWS Doc I got the reply as Connected.

What is the issue here and why I am not able to connect to the JedisCluster using java?

Note :

I am using jedis version 2.9.0

Update:

In AWS Encryption in-transit and Encryption at-rest are activated

So

Jedis jedis = null;
        try{
            jedis = new Jedis(URI.create("rediss://mycachecluster.eaogs8.0001.usw2.cache.amazonaws.com:6379"));
            System.out.println(jedis.ping());
            System.out.println("XXXXX: "+jedis.get("c"));
        }
        catch(Exception exception){
            exception.printStackTrace();
        }
        finally{
            jedis.close();
        }

works fine. But not the jedis cluster.

From URI.create("rediss://..."), it's evident that you are using Redis SSL Scheme to create a successful connection by Jedis. But JedisCluster doesn't have SSL support yet.

There is a pending feature request and pull request regarding this.

---

Update: JedisCluster has SSL/TLS support since Jedis version 3.1.0. Just choose any JedisCluster constructor with boolean ssl parameter and set the value to true.