Classic Clusters
You can use the Classic Clusters panel of the Overview page to view the total number of clusters enabled for Replication Manager, the number that are in a error state, the number that are active, and the number of clusters for which a warning is issued.
You can investigate the issues associated with clusters that have an error or warning status by navigating to Ambari web UI incase of HDP on-premise clusters and Cloudera Manager UI for CDH on-premise clusters.

- Active
- Specifies the total number of clusters currently available to run replication jobs. The DLM Engine can be reached and all services are running.
- Warning
- Specifies the total number of clusters for which remaining disk capacity is less
than 10%.
If this value is greater than zero, you can click the number to open a table that displays the cluster name and remaining capacity.
- Total
- Specifies the total number of clusters which are in force.
- Error
- Specifies the total number of clusters currently are not running as expected.