| Name | Type | Package | Detail |
| BlockingQueueBroker | Class | streaming.io | Detail |
| LifoSetQueue | Class | jobmanager.scheduler | Detail |
| OutboundConnectionQueue | Class | network.netty | Detail |
| PartialOrderPriorityQueue | Class | operators.sort | Detail |
| RequestQueue | Class | disk.iomanager | Detail |
| SetQueue | Class | jobmanager.scheduler | Detail |
