I am new to cassandra.
These are the resources with theirs' respected versions that i have used to set up cassandra.
java : jdk1.8.0.111
cassandra : 3.10
ubuntu : 15.10
I have intsalled cassandra and made changes in the cassandra.yaml file. when i run cqlsh from editor then it shows following error:
Connection error: ('Unable to connect to any servers', {'127.0.0.1': AuthenticationFailed('Remote end requires authentication.',)})
I tried my best to look at the issue but couldn't resolve it.
can someone please help me in this.
It seems you have enabled Authentication in your cassandra.yaml file. Login in cqlsh with default username and password 'cassandra'.
cqlsh <listen address> <cql port> -u cassandra -p cassandra
try below code
from cassandra.cluster import Cluster
from cassandra.auth import PlainTextAuthProvider
auth_provider = PlainTextAuthProvider(username ='<<username>>', password='<<password>>')
cluster=Cluster(['<<some ip or url >>'], auth_provider=auth_provider)
Related
I am getting error when I try to datastax cassandra instance.
bin/cqlsh -u admin -p PASSWORD -b BUNDLE_ZIP_PATH
Connection error: ('Unable to connect to any servers', \
{'xxx:xxx:xxx': ValueError('No host_id to create the SniEndPoint',)} \
)
Have anyone seen this error? This is a to a cloud managed datastax instance on IBM Cloud and the connection used to work before.
The error is generated by the embedded Python driver that cqlsh uses to connect to clusters. It indicates that it couldn't get the host from the secure bundle.
The most likely cause is that the secure bundle you're using is corrupted so I'd suggest downloading it from the source again. Cheers!
For my 6 node cluster, I am unable to cqlsh <ip> to the cluster. It gives me :
Connection error: ('Unable to connect to any servers', {'192.168.19.2': ProtocolError("cql_version '3.3.1' is not supported by remote (w/ native protocol). Supported versions: [u'3.4.4']",)})
But, I checked nodetool status, all my nodes are up and running. Also, I am able to contact the cluster via client.
For the cassandra.yaml on each node, I set the following parameters:
listen_address: node's ip
broadcast_address: node's ip
rpc_address: node's ip
broadcast_address: left blank
seed node: same two ips in each nodes
What seems to be the issue?
Update:
I am able to cqlsh from other nodes but not from the first nodes. I can observe that while working on the first node, I somehow messed up with its cqlsh version. Is it possible to change it?
Connection error: ('Unable to connect to any servers',
{'192.168.19.2': ProtocolError("cql_version '3.3.1' is not supported
by remote (w/ native protocol). Supported versions: [u'3.4.4']",)})
You do have different versions of cassandra installed or using the wrong driver. You want to upgrade to your drivers for connecting to your cluster as 3.4 seems to be a 3.10.x cluster while your driver only supports 3.0.x.
I am trying to connect to presto for cassandra as below
./presto --server localhost:7070 --catalog cassandra
when i try to execute any query on it, it shows following error:
Error running command: Server refused connection: http://localhost:7070/v1/statement
i am new to it and have tried every possible effort to solve this.
could someone help me in this?
Every time i'm trying to edit the cassandra.yaml file, I can't connect to Cassandra with cqlsh, even if I don't modify the file.
I'm getting the following error :
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")})
The parameters for rpc_address and listen_address are good, even for the port.
I really need help for this, thank you in advance
Before going query on cassandra setup or export the environment variable of cqlsh.
You have to export HOST AND PORT in environment like:
export CQLSH_HOST="hostname/ip_address"
export CQLSH_PORT="cassandra_port"
Try connecting like this:
cqlsh IP_ADDRESS_HERE -u cassandra
I am trying to start cqlsh and this is what I get:
/bin$ ./cqlsh
Connection error: ('Unable to connect to any servers', {'127.0.0.1':
OperationTimedOut('errors=None, last_host=None',)})
I tried removing ~/.cassandra, did not work. I also compared cassandra.yaml with a version that worked.
Any ideas?
posting on this old thread as a memo for others, as i couln't managed to find any info to resolve these symptoms without debugging up to now:
got the same issue with a slow testing cluster, and i resolved it by setting a missing control_connection_timeout kwargs in Cluster() init, in cqlsh.py file.
issue opened and patch proposal provided at https://issues.apache.org/jira/browse/CASSANDRA-10959
Depending on your version and configuration, check the values specified for listen_address and/or rpc_address in your cassandra.yaml. If they are defined to anything other than localhost, you will need to provide that address when connecting with cqlsh.
$ grep listen_address: /etc/cassandra/cassandra.yaml
listen_address: 210.156.89.15
$ cqlsh 210.156.89.15 -u aploetz -p aploetz
Connected to PermanentWaves at 210.156.89.15.
[cqlsh 5.0.1 | Cassandra 2.1.4 | CQL spec 3.2.0 | Native protocol v3]
Use HELP for help.
aploetz#cqlsh>