Questions tagged [cassandra]

Apache Cassandra is a free and open-source distributed NoSQL database management system.

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How to install Cassandra on Ubuntu 16.04

I want to install Cassandra on Ubuntu 16.04, and I'm not sure which version to use. How to find the right Cassandra version for 16.04?
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How to resolve java : not found?

I execute the command sudo cassandra -R to start cassandra and I get the following error. getopt: invalid option -- 'R' /usr/sbin/cassandra: 158: exec: java: not found It points to the following ...
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Error while installing cassandra

I tried to install cassandra many time by removing it, but it always gives this error: $ cqlsh Connection error: ('Unable to connect to any servers', {'127.0.0.1': error(111, "Tried connecting to [(...
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1answer
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What is a good way to create a low cost Ubuntu based Cassandra or Hadoop Cluster in my house?

I have a series of "old" data center servers (that I bought when my company upgraded) that I use to run Cassandra and Hadoop clusters at home. They are loud, power hungry and take up a lot of space ...
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2answers
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How can /etc/apt/sources.list.d object be removed?

I have added echo "deb http://www.apache.org/dist/cassandra/debian 311x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list Now I want to remove it and install Cassandra in another ...
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1answer
3k views

Can not open,/var/log/cassandra/gc.log due to Permission denied

What do /var/log files serve for?When I try to run cassandra on my Ubuntu 16.04 OpenJDK 64-Bit Server VM warning: Cannot open file /var/log/cassandra/gc.log due to Permission denied Later 19:47:58,...
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1answer
4k views

How do I get Cassandra to start when there is an error about “Connection refused”?

I installed Cassandra on Ubuntu 16.04. (I have gotten Cassandra to work on RedHat. But now I want it to work on Ubuntu.) The installation seemed to go smoothly. I run this command to prove that ...
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2answers
627 views

Cassandra and CCM on Ubuntu, network loopback alias

Hi When I try to start CCM I get this error: ccmlib.common.UnavailableSocketError: Inet address 127.0.0.1:9042 is not available: [Errno 98] Address already in use; a cluster may already be running or ...
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1answer
667 views

Unable to install Cassandra on Ubuntu 16.04

Running into this error while installing cassandra Unpacking python-setuptools (30.3.0) ... dpkg: error processing archive /var/cache/apt/archives/python-setuptools_30.3.0_all.deb (--unpack): trying ...
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Unable to connect to server on VM- No route to host

Using Win7 host, Ubuntu 14.04 LTS guest, VM Player4.0 and Datastax 4.8.11 Cassandra 2.1.17 My application on the same VM is unable to connect to a service running on the same VM. Everything was ...
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312 views

Unable to login to default account after creating new account in ubuntu 16.04

I was trying to install cassandra in my local machine following this article I created new group and user using the following commands as suggested in the article. root@ubuntu:~# groupadd cassandra ...
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2answers
3k views

error when running “apt-get install cassandra” [closed]

in ubuntu 14.10 when i try to install cassandra with this command "apt-get install cassandra " i have the following errors : edit bodhi.zazen - translation from M.Info Reading package lists ... Done ...
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1answer
10k views

Find the user under which a Ubuntu service runs?

I have a Cassandra service on my Ubuntu but I cannot figure under what user this service runs. I know how to find the owner and the permissions of files and directories. But how can I do this for a ...
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3answers
2k views

How to install Cassandra

I have downloaded dsc-cassandra-2.2.4-bin.tar.gz from http://www.planetcassandra.org/cassandra/ . How do I install it?
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mounting drive remotely on server

I'm doing a school project and we've been given access to some servers, so we can build a simple Cassandra database. I need to mount a drive on each instance -- there are four instances. The ...
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0answers
1k views

Cannot able to connect to another host

After few self tests, I thought I'm having a telnet problem. So I am recreating a shorter version of this question I have two machines: cassandra is running on one machine using IP 172.17.1.XX. ??? ...
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1answer
156 views

How can I configure multiple MaaS environments for juju?

i've realized a vMaaS with 3 vnodes where i deployed juju-gui (node1) and openstack in the other 2 nodes (node2,node3). These last ones at moment are in ready status on vMaaS. Then i've added other ...
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3answers
5k views

How do I work around a “stack size specified is too small” error in Java on POWER8?

I am trying to run Java applications (ElasticSearch and Cassandra) on Ubuntu (14.04) running on Power PC hardware using the OpenJDK. I ran into an error: The stack size specified is too small, ...
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3answers
21k views

Can't start an application as service, but running as standalone process simply works

For a service although a pid file exists, but still when attempting to start service, it fails saying: $ sudo service cassandra start * could not access pidfile for Cassandra I verified folder ...
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2answers
391 views

Please help me speedup my Ubuntu 12

top - 08:28:09 up 12:59, 2 users, load average: 0.59, 0.47, 0.35 Tasks: 200 total, 1 running, 199 sleeping, 0 stopped, 0 zombie Cpu(s): 7.1%us, 2.7%sy, 0.0%ni, 88.1%id, 2.0%wa, 0.0%hi, 0....