org.apache.hadoop.hdfs.server.namenode

Interface NameNodeStatusMXBean

@InterfaceAudience.Public
 @InterfaceStability.Evolving
public interface NameNodeStatusMXBean

This is the JMX management interface for NameNode status information

Method Summary

Modifier and Type	Method and Description
long	getBytesWithFutureGenerationStamps() Gets number of bytes in blocks with future generation stamps.
String	getHostAndPort() Gets the host and port colon separated.
long	getLastHATransitionTime() Gets the most recent HA transition time in milliseconds from the epoch.
String	getNNRole() Gets the NameNode role.
String	getState() Gets the NameNode state.
boolean	isSecurityEnabled() Gets if security is enabled.

Method Detail

getNNRole

String getNNRole()

Gets the NameNode role.

Returns:

the NameNode role.

getState

String getState()

Gets the NameNode state.

Returns:

the NameNode state.

getHostAndPort

String getHostAndPort()

Gets the host and port colon separated.

Returns:

host and port colon separated.

isSecurityEnabled

boolean isSecurityEnabled()

Gets if security is enabled.

Returns:

true, if security is enabled.

getLastHATransitionTime

long getLastHATransitionTime()

Gets the most recent HA transition time in milliseconds from the epoch.

Returns:

the most recent HA transition time in milliseconds from the epoch.

getBytesWithFutureGenerationStamps

long getBytesWithFutureGenerationStamps()

Gets number of bytes in blocks with future generation stamps.

Returns:

number of bytes that can be deleted if exited from safe mode.