| Class | Description | 
|---|---|
| AbstractZoneFailureDetector | |
| AbstractZoneFailureDetector.ZoneHistory | 
 Note: callers please don't side-effect the success/failures/causes fields directly!
 Instead consider sub-classing ZoneHistory, and overriding  
AbstractZoneFailureDetector.newZoneHistory(Location). | 
| BalancingNodePlacementStrategy | 
 Default node placement strategy: attempts to keep the number of nodes balanced across the available locations. 
 | 
| CombiningZoneFailureDetector | |
| CriticalCauseZoneFailureDetector | |
| ProportionalZoneFailureDetector |