org.hadoop.yarn.client

Class YarnClientImpl

java.lang.Object

org.apache.hadoop.yarn.service.AbstractService

org.hadoop.yarn.client.YarnClientImpl

All Implemented Interfaces:

org.apache.hadoop.yarn.service.Service, YarnClient

@InterfaceAudience.Public
@InterfaceStability.Evolving
public class YarnClientImpl
extends org.apache.hadoop.yarn.service.AbstractService
implements YarnClient

Field Summary

Fields

Modifier and Type	Field and Description
protected InetSocketAddress	rmAddress
protected ClientRMProtocol	rmClient

Constructor Summary

Constructors

Constructor and Description
YarnClientImpl()

Method Summary

Methods

Modifier and Type	Method and Description
List<QueueInfo>	getAllQueues() Get information (QueueInfo) about all queues, recursively if there is a hierarchy
List<ApplicationReport>	getApplicationList() Get a report (ApplicationReport) of all Applications in the cluster.
ApplicationReport	getApplicationReport(ApplicationId appId) Get a report of the given Application.
List<QueueInfo>	getChildQueueInfos(String parent) Get information (QueueInfo) about all the immediate children queues of the given queue
GetNewApplicationResponse	getNewApplication() Obtain a new ApplicationId for submitting new applications.
List<NodeReport>	getNodeReports() Get a report of all nodes (NodeReport) in the cluster.
List<QueueUserACLInfo>	getQueueAclsInfo() Get information about acls for current user on all the existing queues.
QueueInfo	getQueueInfo(String queueName) Get information (QueueInfo) about a given queue.
DelegationToken	getRMDelegationToken(Text renewer) Get a delegation token so as to be able to talk to YARN using those tokens.
List<QueueInfo>	getRootQueueInfos() Get information (QueueInfo) about top level queues.
YarnClusterMetrics	getYarnClusterMetrics() Get metrics (YarnClusterMetrics) about the cluster.
void	init(Configuration conf)
void	killApplication(ApplicationId applicationId) Kill an application identified by given ID.
void	start()
void	stop()
ApplicationId	submitApplication(ApplicationSubmissionContext appContext) Submit a new application to YARN.

Methods inherited from class org.apache.hadoop.yarn.service.AbstractService

getConfig, getName, getServiceState, getStartTime, register, unregister

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.yarn.service.Service

getConfig, getName, getServiceState, getStartTime, register, unregister

Field Detail

rmClient

protected ClientRMProtocol rmClient

rmAddress

protected InetSocketAddress rmAddress

Constructor Detail

YarnClientImpl

public YarnClientImpl()

Method Detail

init

public void init(Configuration conf)

Specified by:

init in interface org.apache.hadoop.yarn.service.Service

Overrides:

init in class org.apache.hadoop.yarn.service.AbstractService

start

public void start()

Specified by:

start in interface org.apache.hadoop.yarn.service.Service

Overrides:

start in class org.apache.hadoop.yarn.service.AbstractService

stop

public void stop()

Specified by:

stop in interface org.apache.hadoop.yarn.service.Service

Overrides:

stop in class org.apache.hadoop.yarn.service.AbstractService

getNewApplication

public GetNewApplicationResponse getNewApplication()
                                            throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Obtain a new ApplicationId for submitting new applications.

Returns a response which contains ApplicationId that can be used to submit a new application. See YarnClient.submitApplication(ApplicationSubmissionContext).

See GetNewApplicationResponse for other information that is returned.

Specified by:

getNewApplication in interface YarnClient

Returns:

response containing the new ApplicationId to be used to submit an application

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException

submitApplication

public ApplicationId submitApplication(ApplicationSubmissionContext appContext)
                                throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Submit a new application to YARN.

Specified by:

submitApplication in interface YarnClient

Parameters:

appContext - ApplicationSubmissionContext containing all the details needed to submit a new application

Returns:

ApplicationId of the accepted application

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException

See Also:

YarnClient.getNewApplication()

killApplication

public void killApplication(ApplicationId applicationId)
                     throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Kill an application identified by given ID.

Specified by:

killApplication in interface YarnClient

Parameters:

applicationId - ApplicationId of the application that needs to be killed

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException - in case of errors or if YARN rejects the request due to access-control restrictions.

See Also:

YarnClient.getQueueAclsInfo()

getApplicationReport

public ApplicationReport getApplicationReport(ApplicationId appId)
                                       throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Get a report of the given Application.

In secure mode, YARN verifies access to the application, queue etc. before accepting the request.

If the user does not have VIEW_APP access then the following fields in the report will be set to stubbed values:

• host - set to "N/A"
• RPC port - set to -1
• client token - set to "N/A"
• diagnostics - set to "N/A"
• tracking URL - set to "N/A"
• original tracking URL - set to "N/A"
• resource usage report - all values are -1

Specified by:

getApplicationReport in interface YarnClient

Parameters:

appId - ApplicationId of the application that needs a report

Returns:

application report

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException

getApplicationList

public List<ApplicationReport> getApplicationList()
                                           throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Get a report (ApplicationReport) of all Applications in the cluster.

If the user does not have VIEW_APP access for an application then the corresponding report will be filtered as described in YarnClient.getApplicationReport(ApplicationId).

Specified by:

getApplicationList in interface YarnClient

Returns:

a list of reports of all running applications

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException

getYarnClusterMetrics

public YarnClusterMetrics getYarnClusterMetrics()
                                         throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Get metrics (YarnClusterMetrics) about the cluster.

Specified by:

getYarnClusterMetrics in interface YarnClient

Returns:

cluster metrics

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException

getNodeReports

public List<NodeReport> getNodeReports()
                                throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Get a report of all nodes (NodeReport) in the cluster.

Specified by:

getNodeReports in interface YarnClient

Returns:

A list of report of all nodes

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException

getRMDelegationToken

public DelegationToken getRMDelegationToken(Text renewer)
                                     throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Get a delegation token so as to be able to talk to YARN using those tokens.

Specified by:

getRMDelegationToken in interface YarnClient

Parameters:

renewer - Address of the renewer who can renew these tokens when needed by securely talking to YARN.

Returns:

a delegation token (DelegationToken) that can be used to talk to YARN

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException

getQueueInfo

public QueueInfo getQueueInfo(String queueName)
                       throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Get information (QueueInfo) about a given queue.

Specified by:

getQueueInfo in interface YarnClient

Parameters:

queueName - Name of the queue whose information is needed

Returns:

queue information

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException - in case of errors or if YARN rejects the request due to access-control restrictions.

getQueueAclsInfo

public List<QueueUserACLInfo> getQueueAclsInfo()
                                        throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Get information about acls for current user on all the existing queues.

Specified by:

getQueueAclsInfo in interface YarnClient

Returns:

a list of queue acls (QueueUserACLInfo) for current user

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException

getAllQueues

public List<QueueInfo> getAllQueues()
                             throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Get information (QueueInfo) about all queues, recursively if there is a hierarchy

Specified by:

getAllQueues in interface YarnClient

Returns:

a list of queue-information for all queues

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException

getRootQueueInfos

public List<QueueInfo> getRootQueueInfos()
                                  throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Get information (QueueInfo) about top level queues.

Specified by:

getRootQueueInfos in interface YarnClient

Returns:

a list of queue-information for all the top-level queues

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException

getChildQueueInfos

public List<QueueInfo> getChildQueueInfos(String parent)
                                   throws org.apache.hadoop.yarn.exceptions.YarnRemoteException

Description copied from interface: YarnClient

Get information (QueueInfo) about all the immediate children queues of the given queue

Specified by:

getChildQueueInfos in interface YarnClient

Parameters:

parent - Name of the queue whose child-queues' information is needed

Returns:

a list of queue-information for all queues who are direct children of the given parent queue.

Throws:

org.apache.hadoop.yarn.exceptions.YarnRemoteException