| Class and Description | 
|---|
| LayoutVersion.Feature Enums for features that change the layout version before rolling
 upgrade is supported. | 
| LayoutVersion.FeatureInfo Feature information. | 
| LayoutVersion.LayoutFeature The interface to be implemented by NameNode and DataNode layout features | 
| Class and Description | 
|---|
| LayoutVersion.FeatureInfo Feature information. | 
| LayoutVersion.LayoutFeature The interface to be implemented by NameNode and DataNode layout features | 
| Class and Description | 
|---|
| LayoutVersion.FeatureInfo Feature information. | 
| LayoutVersion.LayoutFeature The interface to be implemented by NameNode and DataNode layout features | 
| SnapshotException Snapshot related exception. | 
| Class and Description | 
|---|
| SnapshotInfo.Bean | 
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