| Package | Description | 
|---|---|
| org.apache.hadoop.yarn.server.resourcemanager.scheduler.constraint | Package org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement
 contains classes related to scheduling containers using placement
 constraints. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | TargetApplicationsNamespaceClass to describe the namespace of allocation tags, used by
  AllocationTags. | 
| static class  | TargetApplicationsNamespace.AllNamespace to all applications in the cluster. | 
| static class  | TargetApplicationsNamespace.AppIDNamespace defined by a certain application ID. | 
| static class  | TargetApplicationsNamespace.AppTagNamespace to applications that attached with a certain application tag. | 
| static class  | TargetApplicationsNamespace.NotSelfNamespace to all applications except itself. | 
| static class  | TargetApplicationsNamespace.SelfNamespace within application itself. | 
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