How to connect Cassandra to localhost using cqlsh? - cassandra

Question

I set rpc_port to the public IP address, and now I can connect to Cassandra just fine from an outside server.
However, I cannot connect from the Cassandra server itself, using cqlsh
I am getting an error.Thar are:
Connection error: Could not connect to localhost:9160
Is there a configuration, I can change to be able to connect from the server itself ?

Answer 1

Check the cassandra.yaml file on the line with rpc_port : normally by default = 9160
Login to the machine hosting cassandra
Try cqlsh 127.0.0.1 9160 : should be ok in any case
try cqlsh [IP of host] 9160 : if ok then cassandra reachable from lan, if ok then cassandra is not reachable from lan but only localhost 127.0.0.1

Answer 2

You need to connect to cassandra through the rpc_address defined in cassandra.yaml. For example, I use cqlsh 10.0.80.49 9160.

Answer 3

Consider changing /etc/cassandra.yaml:
# Whether to start the thrift rpc server.
start_rpc: false
to
start_rpc: true

Answer 4

if you see this in cassandra logs:
INFO [main] 2015-07-21 12:06:27,426 CassandraDaemon.java:406 - Not starting RPC server as requested. Use JMX (StorageService->startRPCServer()) or nodetool (enablethrift) to start it
then just open a terminal and
$ nodetool enablethrift
as written in the INFO message. Should now work. Got this when my system upgraded to cassandra 2.2.0

Answer 5

If you are on OSX
brew install cassandra
First start the Cassandra
cassandra
Connect via CQL shell
cqlsh 127.0.0.1

Answer 6

Maybe start cassandra on your local machine by bin/cassandra -f first?

Answer 7

It's not listening on 127.0.0.1 since you told it to only listen on <public IP>. Make the listen address 0.0.0.0 to listen on all addresses (or just omit it if possible as this is usually the default). See Listening Sockets .NET tutorial or any other socket tutorial to get a basic understanding of socket binding.
Update (#c45556037):
Note that listen_address is the one for other nodes to use to connect to this one (a misleading name). rpc_address is the actual address to locally bind to. It's unclear from the 2.0 docs and is explained better in the 1.0 docs.

Answer 8

I faced same situation while starting cqlsh . I got following error while starting cassandra
Enter only ----cassandra----- in terminal.
it will show all jars and log files . if terminal hang , just escape from it and then enter cqlsh. then it will enter to cassandra cli.
This worked for me

Answer 9

for 2.0.5 the following works for me ..
$CASSANDRA_HOME/bin/cqlsh xx.xx.xxx.xxx 9160

Answer 10

Exception connecting to localhost/9160. reason: connection refused
Connection refused to cassandra cli mode .
goto the root directory of cassandra :
bin/cassandra -- host {host-ip} --port {9160}
if you are having trouble with this , check your {cassandra-root-directory}/conf/cassandra.yaml
the thrift ip or rpc_address is the address used as the host-ip for connecting to cli .
make it your local IP and if you are having trouble connecting using the port 9160 , try changing the rpc_port to 8070 and now try connecting to cassandra-cli mode using the command
bin/cassandra --host {local-IP} --port 8070
This worked for me, hope it works for you too .

Answer 11

Please execute the below query to resolve the issue
#!/bin/bash
export CASSANDRA_HOME=/opt/apache-cassandra-2.1.8
export CQLSH_HOST=192.168.1.200
export CQLSH_PORT=9042
echo $#
$CASSANDRA_HOME/bin/cqlsh $#'
Make sure to change the IP and location of cassandra Home Directory

Answer 12

Use this command
sudo service cassandra start
to start cassandra and then use
cqlsh command

Answer 13

Consider changing /etc/cassandra-env.sh:
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=true"
not "true" but "false"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=false"
sudo service cassandra restart

Answer 14

How to change default port 9042 in Cassandra ?
I resolved issue using below steps :
1) Stop cassandara services
sudo su -
systemctl stop datastax-agent
systemctl stop opscenterd
systemctl stop app-dse
2) Take backup and Change port from 9042 to 9035
cp /opt/dse/resources/cassandra/conf/cassandra.yaml /opt/dse/resources/cassandra/conf/bkp_cassandra.yaml
vi /opt/dse/resources/cassandra/conf/cassandra.yaml
native_transport_port: 9035
3) Start Cassandra services
systemctl start datastax-agent
systemctl start opscenterd
systemctl start app-dse
4) create cqlshrc file.
vi /root/.cassandra/cqlshrc
[connection]
hostname = 198.168.1.100
port = 9035