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
Related
I just completed an installation of mongodb in my computer and, after starting and enabling it I keep getting the same error:
MongoDB shell version v4.2.23
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
2022-11-10T16:25:32.787+0100 E QUERY [js] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed: SocketException: Error connecting to 127.0.0.1:27017 :: caused by :: Connection refused :
connect#src/mongo/shell/mongo.js:353:17
#(connect):2:6
2022-11-10T16:25:32.788+0100 F - [main] exception: connect failed
2022-11-10T16:25:32.788+0100 E - [main] exiting with code 1
I uninstalled and installed multiple times and tried solutions that worked for other people in similar posts but I can not make it work.
I have a feeling it have something to do with the port it is looking for (27017) but I do not know how to check if that is the problem and, if so, how to fix it.
Thanks!
Here are a few things to consider:
Check if the MongoDB process is running (you can verify using ps, netstat (check listen port) command in the server.
See if your MongoDB service runs locally. That is because by default, the listen address of MongoDB is localhost/loopback.
Check if the firewall is running and you have allowed the port.
Verify if you are able to use telnet to command the port 27017 from the application server.
Hi Im new on cassandra and I running ubuntu OS. How do I set up cassandra in ubuntu 20?. Why Im I getting so many errors? This is the last one I come across, I have tried everything
cassandra
.....
ERROR org.apache.cassandra.db.Directories - Doesn't have write permissions for /var/lib/cassandra/data directory
before that one I got this one
cqlsh
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 error indicates that the default cassandra user does not have permissions on the data directory.
Ordinarily for package installations, it will automatically create the directories for you with the correct permissions but if you manually created directories before running the installation, there's a possibility that you created them as root so Cassandra can't access them.
If so, you will need to reset the permissions to the cassandra user for all the directories and subdirectories in /var/lib/cassandra.
For details, see the Installation instructions I wrote in the official Apache Cassandra website. Cheers!
I have a server running node and mongoDB. Mongo is suddenly throwing errors, I managed to get it started upon rebooting the server but the error reappears upon trying to handle a request.
The error when I try to run mongo in a shell is:
MongoDB shell version v4.4.6
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed: SocketException: Error connecting to 127.0.0.1:27017 :: caused by :: Connection refused :
connect#src/mongo/shell/mongo.js:374:17
#(connect):2:6
exception: connect failed
exiting with code 1
My mongod.conf has the correct data path and I also tried setting it manually using mongod --dbpath and can confirm that it is correct.
mongod --repair doesn't work either.
Any ideas?
Turns out the server was out of storage. Running df showed that there was no disk space left.
I ended up adding a volume and moving my database and files there.
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?
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