The Apache Debian package repository currently has unmet dependencies.
Configured repos:
deb http://www.apache.org/dist/cassandra/debian 21x main
deb-src http://www.apache.org/dist/cassandra/debian 21x main
Problem file:
cassandra/dists/21x/main/binary-amd64/Packages
$ sudo apt-get update && sudo apt-get install cassandra-tools
...(omitted)
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
cassandra-tools : Depends: cassandra (= 2.1.2) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.