Cassandra has stopped producing log files

I've recently taken up the role of managing a Cassandra Cluster that has been running in production for a few years. This is my first time working with Cassandra so I would appreciate any insights. It is a 3 node cluster with 100% replication across each node. The nodes each have a load of around 5 TB. The config is not ideal but they are working fine for now. However **whenever there is an issue it is hard to troubleshoot since I noticed log files have stopped updating a few years back.** I have made sure the logging directory was not changed, and all the logging levels are at default. Memory and disk are still at reasonable usage levels. I noticed each of the logs have reached 10 zip files and stopped producing anything. Other than that I do not see the issue. I would appreciate the help. Thanks