Cqlsh does now work on newly installed Cassandra on Ubuntu 16.04

Question

I am getting this error when I try cqlsh or cqlsh 127.0.0.1:9160 :

Connection error: ('Unable to connect to any servers', {'127.0.0.1': error(111, "Tried connecting to [('127.0.0.1', 9042)]. Last error: Connection refused")})

I just started learning Cassandra. My machine had an installation of Cassandra for something else, so I uninstalled and installed Cassandra 3.11.1 to follow tutorials. I followed this to uninstall, I used this instruction to install.

My hosts file is:

127.0.0.1   localhost

My python is version 2.7.12 and some Cassandra settings are:

start_rpc: false    
rpc_address: localhost
rpc_port: 9160

Cassandra status is active, and node was up and normal when I first tried "sudo nodetool status", but now it is erroting after I changed start_rpc to true and change it back to false :( Node error message is:

nodetool: Failed to connect to '127.0.0.1:7199' - ConnectException: 'Connection refused'.

I read this and tried his suggestion, and it did not work.

Also, ideally, I want to use python 3. Is it a bad idea?

Answer 1

您可以尝试连接至native_transport_port ，默认值为9042。我将其发布为答案，因为我的用户ID权限无法发布评论。

Answer 2

My uninstalling did not properly delete Cassandra folders. Although I did tell its installer to make a new folders, it did not. I needed to purge Cassandra when I uninstall.