Hawkular-metrics unstable with connection reset by peer in Cassandra logs

Issue

• My metrics cluster is unhealthy
• Hawkular-metrics pod keeps restarting. Checking cassandra logs, we see a lot of:

INFO  [epollEventLoopGroup-2-1] <DATE_TIME> Message.java:619 - Unexpected exception during request; channel = [id: 0x705df8b8, L:/<IP>:9042 - R:/<IP>:49108]
io.netty.channel.unix.Errors$NativeIoException: syscall:read(...)() failed: Connection reset by peer
        at io.netty.channel.unix.FileDescriptor.readAddress(...)(Unknown Source) ~[netty-all-4.0.44.Final.jar:4.0.44.Final]