org.apache.hadoop.hdfs.server.datanode

Interface DataNodeMXBean

@InterfaceAudience.Public
 @InterfaceStability.Stable
public interface DataNodeMXBean

This is the JMX management interface for data node information

Method Summary

Modifier and Type	Method and Description
String	getClusterId() Gets the cluster id.
Map<String,Map<String,Long>>	getDatanodeNetworkCounts() Gets the network error counts on a per-Datanode basis.
String	getHttpPort() Gets the http port.
String	getNamenodeAddresses() Gets the namenode IP addresses
String	getRpcPort() Gets the rpc port.
String	getSoftwareVersion() Get the version of software running on the DataNode
String	getVersion() Gets the version of Hadoop.
String	getVolumeInfo() Gets the information of each volume on the Datanode.
int	getXceiverCount() Returns an estimate of the number of Datanode threads actively transferring blocks.

Method Detail

getVersion

String getVersion()

Gets the version of Hadoop.

Returns:

the version of Hadoop

getSoftwareVersion

String getSoftwareVersion()

Get the version of software running on the DataNode

Returns:

a string representing the version

getRpcPort

String getRpcPort()

Gets the rpc port.

Returns:

the rpc port

getHttpPort

String getHttpPort()

Gets the http port.

Returns:

the http port

getNamenodeAddresses

String getNamenodeAddresses()

Gets the namenode IP addresses

Returns:

the namenode IP addresses that the datanode is talking to

getVolumeInfo

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

String getClusterId()

Gets the cluster id.

Returns:

the cluster id

getXceiverCount

int getXceiverCount()

Returns an estimate of the number of Datanode threads actively transferring blocks.

getDatanodeNetworkCounts

Map<String,Map<String,Long>> getDatanodeNetworkCounts()

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