I have deployed a Oracle NoSQL Database in a server (ip address:192.168.0.172:5000)such that my client code does not have to authenticate to the store。
I have closed the client and the server's firewall And the client and the server can access each other without password.
Now I tried to connect to that server in a client(ip address:192.168.0.169) .But an error occured like this:

I did not know why? Hope someone konws the solutions to this problem.