| Class and Description | 
|---|
| HSAdminRefreshProtocol | 
| MRClientProtocol | 
| MRClientProtocolPB | 
| Class and Description | 
|---|
| HSClientProtocol | 
| MRClientProtocol | 
| MRClientProtocolPB | 
| Class and Description | 
|---|
| HSClientProtocol | 
| HSClientProtocolPB | 
| MRClientProtocol | 
| MRClientProtocolPB | 
| Class and Description | 
|---|
| MRClientProtocol | 
| Class and Description | 
|---|
| MRDelegationTokenIdentifier TokenIdentifierthat identifies delegation tokens 
 issued by JobHistoryServer to delegate
 MR tasks talking to the JobHistoryServer. | 
| Class and Description | 
|---|
| MRClientProtocolPB | 
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