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?
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!
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)
I have Cassandra running on a host that i can assess via SSH. When I want to connect with DBeaver, I am using the following connection settings:
Connection:
Host/Port: localhost:9042
SSH-Tunnel
Host/Port: my.remote.host:37938
On connect, I am getting the following error message:
com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /127.0.0.1:35836 (com.datastax.driver.core.exceptions.TransportException: [/127.0.0.1:35836] Channel has been closed))
When I try again, I am getting the same error for a different port number:
com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /127.0.0.1:48799 (com.datastax.driver.core.exceptions.TransportException: [/127.0.0.1:48799] Channel has been closed))
I had this behavior with Version 3 of DBeaver and also now with the newest Version 4.0.4
Why doesn't DBeaver use the configured port number to connect but a random one?
Try it with port 22, it works for me.
Does regular ssh on port 37938 working? Make sure the port is open. JMX can use these ports, so maybe you are interfering with it.
Which version of Cassandra you are using?
Set your HOST ip of your server to rpc_address in cassandra.yaml and restart your cassandra service.
Ex : If your cluster IP is 10.40.60.23
then cassandra.yaml in /etc/cassandra/ folder, incase of Ubuntu :
rpc_address : 10.40.60.23
I have 2 node Cassandra cluster with datastax-agent up and running(one seed node) also nodetool status showing healthy.
In the 3 node I have opscenter install and the UI is loading fine with a blank screen, when I saw the var log it's complaining 'NO cassandra connection available for hostlist with a invalid unsupported version'(paster the log details message below). Any help is highly appreciated
2017-02-25 06:33:06+0000 [CLUSTER_NAME] ERROR: Control connection failed to connect, shutting down Cluster: ('Unable to connect to any servers', {'SEED-IP': })
2017-02-25 06:33:06+0000 [CLUSTER_NAME] WARN: No cassandra connection available for hostlist ['SEED-IP'] . Retrying.
I was using an old version of opscenter which was not matching the version of dse. Here is the map for your refference.
Reference: datastax doc
I am unable to connect to to the cassandra. By this I mean that when I try cassandra-CLI, or pycassaShell I get the following error:
Exception connecting to localhost/9160. Reason: Connection refused.
I have tried using a few non-defaul ports but to no joy.
I am running cassandra version 1.0.7
I have tried bounding the service, using restart, stop, start, and force-restart.
Run jps command under root user and kill CassandraDaemon if you will see it. After this you will start Cassandra again.
My problem was cassandra was not even starting. Solution was to start Cassandra!
I had the same issue in cassandra, After rename var/lib/cassandra/data to var/lib/cassandra/data1 then cassandra is working fine, If cassandra alloted maximum memory is full then it will throw connection refuse exception