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Questions tagged [cassandra]

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

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2answers
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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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0answers
15 views

How to restrict Cassandra to fixed memory

We are using cassandra in order to collect the data from thingsboard. The memory it started with was 4GB (after executing the systemctl status for cassandra) and after 15 hours it has reached up to 9....
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0answers
308 views

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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2answers
137 views

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 [(...
2
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1answer
91 views

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
1k views

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 ...
2
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0answers
912 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,...
2
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1answer
1k 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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0answers
204 views

How to set iptables to secure a cassandra server?

im new to ubuntu, i am trying to create a cassandra cluster and secure it with iptables, i write iptables like this $ -A INPUT -p tcp --dport 22 -j ACCEPT $ -A INPUT -p tcp --dport 80 -j ACCEPT $ -A ...
0
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1answer
314 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 ...
1
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1answer
468 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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0answers
1k views

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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0answers
246 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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0answers
2k views

E: Package 'cassandra' has no installation candidate [duplicate]

Hi Everyone I try to install "Cassandra" on a 14.04 Ubuntu server. I enter the ff code in the terminal "apt-get install cassandra" but I get the ff response: Reading package lists... Done Building ...
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2answers
2k 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 ...
1
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1answer
5k 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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2answers
290 views

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 ...
1
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0answers
983 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. ??? ...
1
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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 ...
2
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3answers
4k 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
16k 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
312 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....