Package org.apache.hadoop.hdfs.server.protocol

Class RegisterCommand

java.lang.Object

org.apache.hadoop.hdfs.server.protocol.ServerCommand

org.apache.hadoop.hdfs.server.protocol.DatanodeCommand

org.apache.hadoop.hdfs.server.protocol.RegisterCommand

@Private
@Evolving
public class RegisterCommand
extends DatanodeCommand

A RegisterCommand is an instruction to a datanode to register with the namenode. This command can't be combined with other commands in the same response. This is because after the datanode processes RegisterCommand, it will skip the rest of the DatanodeCommands in the same HeartbeatResponse.

Field Summary

Fields

Modifier and Type	Field	Description
static DatanodeCommand	REGISTER

Constructor Summary

Constructors

Constructor	Description
RegisterCommand()

Method Summary

Methods inherited from class org.apache.hadoop.hdfs.server.protocol.ServerCommand

getAction, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

REGISTER

public static final DatanodeCommand REGISTER

Constructor Detail

RegisterCommand

public RegisterCommand()