Details
Enabling Network Time Protocol (NTP), or some equivalent way, to keep clocks on all nodes in sync is critical.
Rationale:
Cassandra decides which data is most current between all of the nodes in the cluster based on timestamps. It is paramount to ensure all clocks are in-sync, otherwise the most current data may not be returned or worse, marked for deletion.
Solution
Install and start the time protocol on every node in the Cassandra cluster.
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: Audit and Accountability.This control applies to the following type of system Unix.