Cannot connect to redis using jedis

Question

Redis version: 3.2.0 Jedis version: 2.8.1

Below is my java code for connecting to redis:

public class TestRedis {
public static void main(String[] args) {
    String host = args[0];
    int port = Integer.parseInt(args[1]);
    try (Jedis jedis = new Jedis(host, port)) {
        System.out.println("Connected to jedis " + jedis.ping());
    } catch(Exception e){
        e.printStackTrace();
    }
}

}

I am running this program in the machine where redis is installed. This machine's ip address is 192.168.1.57

If I provide host="localhost" and port = "6379" as arguments, connection with redis successfully established.

However, If I give host="192.168.1.57" and port = "6379" in arguments, I end up with below exception:

redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused
    at redis.clients.jedis.Connection.connect(Connection.java:164)
    at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:80)
    at redis.clients.jedis.Connection.sendCommand(Connection.java:100)
    at redis.clients.jedis.Connection.sendCommand(Connection.java:95)
    at redis.clients.jedis.BinaryClient.ping(BinaryClient.java:93)
    at redis.clients.jedis.BinaryJedis.ping(BinaryJedis.java:105)
    at TestRedis.main(TestRedis.java:14)
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:579)
    at redis.clients.jedis.Connection.connect(Connection.java:158)
    ... 6 more

Please help...

Answer 1

There are a few settings that would affect this: bind and protected-mode. They work together to provide a baseline of security with new installs.

Find the following in your redis.conf file and comment it out:

bind 127.0.0.1

By adding a # in front of it:

# bind 127.0.0.1

Or, if you would rather not comment it out, you can also add the IP of your eth0/em1 interface to it, like this:

bind 127.0.0.1 192.168.1.57

Also, unless you're using password security, you'll also have to turn off protected mode by changing:

protected-mode yes

To:

protected-mode no

Make sure that you read the relevant documentation and understand the security implications of both of these changes.

After making these changes, restart redis.