Package org.apache.hadoop.hdfs.server.datanode

Interface DataNodeMXBean

All Known Implementing Classes:

DataNode

@Private
@Stable
public interface DataNodeMXBean

This is the JMX management interface for data node information. End users shouldn't be implementing these interfaces, and instead access this information through the JMX APIs.

Method Summary

Modifier and Type	Method	Description
int	getActiveTransferThreadCount()	Returns the number of Datanode threads actively transferring blocks.
java.lang.String	getBPServiceActorInfo()	Gets information of the block pool service actors.
java.lang.String	getClusterId()	Gets the cluster id.
java.lang.String	getDatanodeHostname()	Gets the datanode hostname.
java.util.Map<java.lang.String,java.util.Map<java.lang.String,java.lang.Long>>	getDatanodeNetworkCounts()	Gets the network error counts on a per-Datanode basis.
java.lang.String	getDataPort()	Gets the data port.
java.lang.String	getDiskBalancerStatus()	Gets the diskBalancer Status.
long	getDNStartedTimeInMillis()	Get the start time of the DataNode.
java.lang.String	getHttpPort()	Gets the http port.
java.lang.String	getNamenodeAddresses()	Gets the namenode IP addresses.
java.lang.String	getRpcPort()	Gets the rpc port.
java.lang.String	getSendPacketDownstreamAvgInfo()	Gets the average info (e.g.
java.lang.String	getSlowDisks()	Gets the slow disks in the Datanode.
java.lang.String	getSoftwareVersion()	Get the version of software running on the DataNode
java.lang.String	getVersion()	Gets the version of Hadoop.
java.lang.String	getVolumeInfo()	Gets the information of each volume on the Datanode.
int	getXceiverCount()	Returns the number of active xceivers.
int	getXmitsInProgress()	Returns an estimate of the number of data replication/reconstruction tasks running currently.
boolean	isSecurityEnabled()	Gets if security is enabled.

Method Detail

getVersion

java.lang.String getVersion()

Gets the version of Hadoop.

Returns:

the version of Hadoop

getSoftwareVersion

java.lang.String getSoftwareVersion()

Get the version of software running on the DataNode

Returns:

a string representing the version

getRpcPort

java.lang.String getRpcPort()

Gets the rpc port.

Returns:

the rpc port

getHttpPort

java.lang.String getHttpPort()

Gets the http port.

Returns:

the http port

getDataPort

java.lang.String getDataPort()

Gets the data port.

Returns:

the data port

getNamenodeAddresses

java.lang.String getNamenodeAddresses()

Gets the namenode IP addresses.

Returns:

the namenode IP addresses that the datanode is talking to

getDatanodeHostname

java.lang.String getDatanodeHostname()

Gets the datanode hostname.

Returns:

the datanode hostname for the datanode.

getBPServiceActorInfo

java.lang.String getBPServiceActorInfo()

Gets information of the block pool service actors.

Returns:

block pool service actors info

getVolumeInfo

java.lang.String getVolumeInfo()

Gets the information of each volume on the Datanode. Please see the implementation for the format of returned information.

Returns:

the volume info

getClusterId

java.lang.String getClusterId()

Gets the cluster id.

Returns:

the cluster id

getXceiverCount

int getXceiverCount()

Returns the number of active xceivers.

getActiveTransferThreadCount

int getActiveTransferThreadCount()

Returns the number of Datanode threads actively transferring blocks.

getXmitsInProgress

int getXmitsInProgress()

Returns an estimate of the number of data replication/reconstruction tasks running currently.

getDatanodeNetworkCounts

java.util.Map<java.lang.String,java.util.Map<java.lang.String,java.lang.Long>> getDatanodeNetworkCounts()

Gets the network error counts on a per-Datanode basis.

getDiskBalancerStatus

java.lang.String getDiskBalancerStatus()

Gets the diskBalancer Status. Please see implementation for the format of the returned information.

Returns:

DiskBalancer Status

getSendPacketDownstreamAvgInfo

java.lang.String getSendPacketDownstreamAvgInfo()

Gets the average info (e.g. time) of SendPacketDownstream when the DataNode acts as the penultimate (2nd to the last) node in pipeline.

Example Json: {"[185.164.159.81:9801]RollingAvgTime":504.867, "[49.236.149.246:9801]RollingAvgTime":504.463, "[84.125.113.65:9801]RollingAvgTime":497.954}

getSlowDisks

java.lang.String getSlowDisks()

Gets the slow disks in the Datanode.

Returns:

list of slow disks

isSecurityEnabled

boolean isSecurityEnabled()

Gets if security is enabled.

Returns:

true, if security is enabled.

getDNStartedTimeInMillis

long getDNStartedTimeInMillis()

Get the start time of the DataNode.

Returns:

Start time of the DataNode.