/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hdfs.server.datanode;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import java.util.Map;
/**
*
* This is the JMX management interface for data node information
*/
@InterfaceAudience.Public
@InterfaceStability.Stable
public interface DataNodeMXBean {
/**
* Gets the version of Hadoop.
*
* @return the version of Hadoop
*/
public String getVersion();
/**
* Gets the rpc port.
*
* @return the rpc port
*/
public String getRpcPort();
/**
* Gets the http port.
*
* @return the http port
*/
public String getHttpPort();
/**
* Gets the data port.
*
* @return the data port
*/
String getDataPort();
/**
* Gets the namenode IP addresses.
*
* @return the namenode IP addresses that the datanode is talking to
*/
public String getNamenodeAddresses();
/**
* Gets information of the block pool service actors.
*
* @return block pool service actors info
*/
String getBPServiceActorInfo();
/**
* Gets the information of each volume on the Datanode. Please
* see the implementation for the format of returned information.
*
* @return the volume info
*/
public String getVolumeInfo();
/**
* Gets the cluster id.
*
* @return the cluster id
*/
public String getClusterId();
/**
* Returns an estimate of the number of Datanode threads
* actively transferring blocks.
*/
public int getXceiverCount();
/**
* Returns an estimate of the number of data replication/reconstruction tasks
* running currently.
*/
public int getXmitsInProgress();
/**
* Gets the network error counts on a per-Datanode basis.
*/
public Map<String, Map<String, Long>> getDatanodeNetworkCounts();
/**
* Gets the average info (e.g. time) of SendPacketDownstream when the
* DataNode acts as the penultimate (2nd to the last) node in pipeline.
* <p>
* 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}
* </p>
*/
String getSendPacketDownstreamAvgInfo();
/**
* Gets the slow disks in the Datanode.
*
* @return list of slow disks
*/
String getSlowDisks();
}