Could not determine seeds from a headless service named hawkular-cassandra-nodes

Issue

• Cassandra pods are in CrashLoopBackOff

1m        1h        106       hawkular-cassandra-2-6twjz.15dd33837a0c2cbc   Pod       spec.containers{hawkular-cassandra-2}   Warning   Unhealthy   kubelet, node1.example.com   Readiness probe failed: Could not get the Cassandra status. This may mean that the Cassandra instance is not up yet. Will try again
nodetool: Failed to connect to '127.0.0.1:7199' - ConnectException: 'Connection refused (Connection refused)'.

• Logs show:

Trying to access the Seed list [try #25]
Trying to access the Seed list [try #26]
Trying to access the Seed list [try #27]
Trying to access the Seed list [try #28]
Trying to access the Seed list [try #29]
Trying to access the Seed list [try #30]
ERROR. Could not determine seeds from a headless service named hawkular-cassandra-nodes