int clusterKey = ClusterTraitsBase.getClusterKeyFromResourceKeyNoThrow(resourceKey);
if (ClusterTraitsBase.isVirtualClusterKey(clusterKey))
throw new RuntimeException("Tried to get a persistent cluster for a virtual resource.");
int clusterKey = ClusterTraitsBase.getClusterKeyFromResourceKeyNoThrow(resourceKey);
if (ClusterTraitsBase.isVirtualClusterKey(clusterKey))
throw new RuntimeException("Tried to get a persistent cluster for a virtual resource.");