C＃到Cassandra服务的用户名和密码

Question

Cassandra is running as a service on a remote machine but in the same network. Also I created a .net program that communicates with the Cassandra environment.

I was able to communicate with Cassandra when it was NOT running as a service with the following connection string:

private void Connect()
    {
        cluster = Cluster.Builder().WithCredentials(username, password).AddContactPoint("192.168.30.104").Build();
        session = cluster.Connect("core_meter");
    }

But when I try to connect to Cassandra when its running as a service I get the following error:

An unhandled exception of type 'Cassandra.NoHostAvailableException' occurred in Cassandra.dll

Additional information: None of the hosts tried for query are available (tried: 192.168.30.104:9042)

I am not sure if I have to change anything in my .yaml file before I can approach a service with username and password. here is the yaml file: https://www.dropbox.com/s/wbrexlarkjrvlrm/cassandra.yaml?dl=0

edit: When i communicate with the service WITHOUT a username and password I can communicate with the service (I can always communicate with the execution through command prompt) but when I use a username and password it does not work anymore.

Answer 1

It seems to me that your service and the single executable are using different yaml configuration files. Check your environment variables and your cassandra-env.sh files. Also have a look at DataStax documentation .