| Package | Description | 
|---|---|
| org.apache.hadoop.yarn.server.nodemanager | |
| org.apache.hadoop.yarn.server.nodemanager.nodelabels | Package to encapsulate classes used to handle node labels and node
 attributes in NM. | 
| Class and Description | 
|---|
| NodeAttributesProvider Abstract class which will be responsible for fetching the node attributes. | 
| NodeLabelsProvider Abstract class which will be responsible for fetching the node labels. | 
| Class and Description | 
|---|
| AbstractNodeDescriptorsProvider Provides base implementation of NodeDescriptorsProvider with Timer and
 expects subclass to provide TimerTask which can fetch node descriptors. | 
| NodeAttributesProvider Abstract class which will be responsible for fetching the node attributes. | 
| NodeDescriptorsProvider Interface which will be responsible for fetching node descriptors,
 a node descriptor could be a
  NodeLabelor aNodeAttribute. | 
| NodeLabelsProvider Abstract class which will be responsible for fetching the node labels. | 
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