org.apache.hadoop.hdfs.server.common
Classes 
JspHelper.Url
Enums 
HdfsServerConstants.BlockUCState
HdfsServerConstants.NamenodeRole
HdfsServerConstants.NodeType
HdfsServerConstants.ReplicaState
HdfsServerConstants.RollingUpgradeStartupOption
HdfsServerConstants.StartupOption
Storage.StorageState