hadoop ApplicationClientProtocol 源码
haddop ApplicationClientProtocol 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/ApplicationClientProtocol.java
/**
* 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.yarn.api;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience.Public;
import org.apache.hadoop.classification.InterfaceStability.Stable;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.io.retry.Idempotent;
import org.apache.hadoop.yarn.api.protocolrecords.FailApplicationAttemptRequest;
import org.apache.hadoop.yarn.api.protocolrecords.FailApplicationAttemptResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationReportRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetAttributesToNodesRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetAttributesToNodesResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetClusterMetricsRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetClusterMetricsResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodeAttributesRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodeAttributesResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodeLabelsRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodeLabelsResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodesRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodesResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetLabelsToNodesRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetLabelsToNodesResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetNewApplicationRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetNewApplicationResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetNewReservationRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetNewReservationResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetNodesToAttributesRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetNodesToAttributesResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetNodesToLabelsRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetNodesToLabelsResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetQueueInfoRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetQueueInfoResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetQueueUserAclsInfoRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetQueueUserAclsInfoResponse;
import org.apache.hadoop.yarn.api.protocolrecords.KillApplicationRequest;
import org.apache.hadoop.yarn.api.protocolrecords.KillApplicationResponse;
import org.apache.hadoop.yarn.api.protocolrecords.MoveApplicationAcrossQueuesRequest;
import org.apache.hadoop.yarn.api.protocolrecords.MoveApplicationAcrossQueuesResponse;
import org.apache.hadoop.yarn.api.protocolrecords.ReservationDeleteRequest;
import org.apache.hadoop.yarn.api.protocolrecords.ReservationDeleteResponse;
import org.apache.hadoop.yarn.api.protocolrecords.ReservationListRequest;
import org.apache.hadoop.yarn.api.protocolrecords.ReservationListResponse;
import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionRequest;
import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionResponse;
import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateRequest;
import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateResponse;
import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityRequest;
import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityResponse;
import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationTimeoutsRequest;
import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationTimeoutsResponse;
import org.apache.hadoop.yarn.api.protocolrecords.SignalContainerRequest;
import org.apache.hadoop.yarn.api.protocolrecords.SignalContainerResponse;
import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationRequest;
import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetAllResourceProfilesRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetAllResourceProfilesResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetAllResourceTypeInfoRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetAllResourceTypeInfoResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetResourceProfileRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetResourceProfileResponse;
import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.ApplicationSubmissionContext;
import org.apache.hadoop.yarn.api.records.ContainerLaunchContext;
import org.apache.hadoop.yarn.api.records.NodeReport;
import org.apache.hadoop.yarn.api.records.ReservationId;
import org.apache.hadoop.yarn.api.records.Resource;
import org.apache.hadoop.yarn.api.records.YarnClusterMetrics;
import org.apache.hadoop.yarn.exceptions.ApplicationNotFoundException;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.hadoop.yarn.exceptions.YARNFeatureNotEnabledException;
/**
* <p>The protocol between clients and the <code>ResourceManager</code>
* to submit/abort jobs and to get information on applications, cluster metrics,
* nodes, queues and ACLs.</p>
*/
@Public
@Stable
public interface ApplicationClientProtocol extends ApplicationBaseProtocol {
/**
* <p>The interface used by clients to obtain a new {@link ApplicationId} for
* submitting new applications.</p>
*
* <p>The <code>ResourceManager</code> responds with a new, monotonically
* increasing, {@link ApplicationId} which is used by the client to submit
* a new application.</p>
*
* <p>The <code>ResourceManager</code> also responds with details such
* as maximum resource capabilities in the cluster as specified in
* {@link GetNewApplicationResponse}.</p>
*
* @param request request to get a new <code>ApplicationId</code>
* @return response containing the new <code>ApplicationId</code> to be used
* to submit an application
* @throws YarnException
* @throws IOException
* @see #submitApplication(SubmitApplicationRequest)
*/
@Public
@Stable
@Idempotent
public GetNewApplicationResponse getNewApplication(
GetNewApplicationRequest request)
throws YarnException, IOException;
/**
* <p>The interface used by clients to submit a new application to the
* <code>ResourceManager.</code></p>
*
* <p>The client is required to provide details such as queue,
* {@link Resource} required to run the <code>ApplicationMaster</code>,
* the equivalent of {@link ContainerLaunchContext} for launching
* the <code>ApplicationMaster</code> etc. via the
* {@link SubmitApplicationRequest}.</p>
*
* <p>Currently the <code>ResourceManager</code> sends an immediate (empty)
* {@link SubmitApplicationResponse} on accepting the submission and throws
* an exception if it rejects the submission. However, this call needs to be
* followed by {@link #getApplicationReport(GetApplicationReportRequest)}
* to make sure that the application gets properly submitted - obtaining a
* {@link SubmitApplicationResponse} from ResourceManager doesn't guarantee
* that RM 'remembers' this application beyond failover or restart. If RM
* failover or RM restart happens before ResourceManager saves the
* application's state successfully, the subsequent
* {@link #getApplicationReport(GetApplicationReportRequest)} will throw
* a {@link ApplicationNotFoundException}. The Clients need to re-submit
* the application with the same {@link ApplicationSubmissionContext} when
* it encounters the {@link ApplicationNotFoundException} on the
* {@link #getApplicationReport(GetApplicationReportRequest)} call.</p>
*
* <p>During the submission process, it checks whether the application
* already exists. If the application exists, it will simply return
* SubmitApplicationResponse</p>
*
* <p> In secure mode,the <code>ResourceManager</code> verifies access to
* queues etc. before accepting the application submission.</p>
*
* @param request request to submit a new application
* @return (empty) response on accepting the submission
* @throws YarnException
* @throws IOException
* @see #getNewApplication(GetNewApplicationRequest)
*/
@Public
@Stable
@Idempotent
public SubmitApplicationResponse submitApplication(
SubmitApplicationRequest request)
throws YarnException, IOException;
/**
* <p>The interface used by clients to request the
* <code>ResourceManager</code> to fail an application attempt.</p>
*
* <p>The client, via {@link FailApplicationAttemptRequest} provides the
* {@link ApplicationAttemptId} of the attempt to be failed.</p>
*
* <p> In secure mode,the <code>ResourceManager</code> verifies access to the
* application, queue etc. before failing the attempt.</p>
*
* <p>Currently, the <code>ResourceManager</code> returns an empty response
* on success and throws an exception on rejecting the request.</p>
*
* @param request request to fail an attempt
* @return <code>ResourceManager</code> returns an empty response
* on success and throws an exception on rejecting the request
* @throws YarnException
* @throws IOException
* @see #getQueueUserAcls(GetQueueUserAclsInfoRequest)
*/
@Public
@Unstable
public FailApplicationAttemptResponse failApplicationAttempt(
FailApplicationAttemptRequest request)
throws YarnException, IOException;
/**
* <p>The interface used by clients to request the
* <code>ResourceManager</code> to abort submitted application.</p>
*
* <p>The client, via {@link KillApplicationRequest} provides the
* {@link ApplicationId} of the application to be aborted.</p>
*
* <p> In secure mode,the <code>ResourceManager</code> verifies access to the
* application, queue etc. before terminating the application.</p>
*
* <p>Currently, the <code>ResourceManager</code> returns an empty response
* on success and throws an exception on rejecting the request.</p>
*
* @param request request to abort a submitted application
* @return <code>ResourceManager</code> returns an empty response
* on success and throws an exception on rejecting the request
* @throws YarnException
* @throws IOException
* @see #getQueueUserAcls(GetQueueUserAclsInfoRequest)
*/
@Public
@Stable
@Idempotent
public KillApplicationResponse forceKillApplication(
KillApplicationRequest request)
throws YarnException, IOException;
/**
* <p>The interface used by clients to get metrics about the cluster from
* the <code>ResourceManager</code>.</p>
*
* <p>The <code>ResourceManager</code> responds with a
* {@link GetClusterMetricsResponse} which includes the
* {@link YarnClusterMetrics} with details such as number of current
* nodes in the cluster.</p>
*
* @param request request for cluster metrics
* @return cluster metrics
* @throws YarnException
* @throws IOException
*/
@Public
@Stable
@Idempotent
public GetClusterMetricsResponse getClusterMetrics(
GetClusterMetricsRequest request)
throws YarnException, IOException;
/**
* <p>The interface used by clients to get a report of all nodes
* in the cluster from the <code>ResourceManager</code>.</p>
*
* <p>The <code>ResourceManager</code> responds with a
* {@link GetClusterNodesResponse} which includes the
* {@link NodeReport} for all the nodes in the cluster.</p>
*
* @param request request for report on all nodes
* @return report on all nodes
* @throws YarnException
* @throws IOException
*/
@Public
@Stable
@Idempotent
public GetClusterNodesResponse getClusterNodes(
GetClusterNodesRequest request)
throws YarnException, IOException;
/**
* <p>The interface used by clients to get information about <em>queues</em>
* from the <code>ResourceManager</code>.</p>
*
* <p>The client, via {@link GetQueueInfoRequest}, can ask for details such
* as used/total resources, child queues, running applications etc.</p>
*
* <p> In secure mode,the <code>ResourceManager</code> verifies access before
* providing the information.</p>
*
* @param request request to get queue information
* @return queue information
* @throws YarnException
* @throws IOException
*/
@Public
@Stable
@Idempotent
public GetQueueInfoResponse getQueueInfo(
GetQueueInfoRequest request)
throws YarnException, IOException;
/**
* <p>The interface used by clients to get information about <em>queue
* acls</em> for <em>current user</em> from the <code>ResourceManager</code>.
* </p>
*
* <p>The <code>ResourceManager</code> responds with queue acls for all
* existing queues.</p>
*
* @param request request to get queue acls for <em>current user</em>
* @return queue acls for <em>current user</em>
* @throws YarnException
* @throws IOException
*/
@Public
@Stable
@Idempotent
public GetQueueUserAclsInfoResponse getQueueUserAcls(
GetQueueUserAclsInfoRequest request)
throws YarnException, IOException;
/**
* Move an application to a new queue.
*
* @param request the application ID and the target queue
* @return an empty response
* @throws YarnException
* @throws IOException
*/
@Public
@Unstable
@Idempotent
public MoveApplicationAcrossQueuesResponse moveApplicationAcrossQueues(
MoveApplicationAcrossQueuesRequest request) throws YarnException, IOException;
/**
* <p>The interface used by clients to obtain a new {@link ReservationId} for
* submitting new reservations.</p>
*
* <p>The <code>ResourceManager</code> responds with a new, unique,
* {@link ReservationId} which is used by the client to submit
* a new reservation.</p>
*
* @param request to get a new <code>ReservationId</code>
* @return response containing the new <code>ReservationId</code> to be used
* to submit a new reservation
* @throws YarnException if the reservation system is not enabled.
* @throws IOException on IO failures.
* @see #submitReservation(ReservationSubmissionRequest)
*/
@Public
@Unstable
@Idempotent
GetNewReservationResponse getNewReservation(
GetNewReservationRequest request)
throws YarnException, IOException;
/**
* <p>
* The interface used by clients to submit a new reservation to the
* {@code ResourceManager}.
* </p>
*
* <p>
* The client packages all details of its request in a
* {@link ReservationSubmissionRequest} object. This contains information
* about the amount of capacity, temporal constraints, and concurrency needs.
* Furthermore, the reservation might be composed of multiple stages, with
* ordering dependencies among them.
* </p>
*
* <p>
* In order to respond, a new admission control component in the
* {@code ResourceManager} performs an analysis of the resources that have
* been committed over the period of time the user is requesting, verify that
* the user requests can be fulfilled, and that it respect a sharing policy
* (e.g., {@code CapacityOverTimePolicy}). Once it has positively determined
* that the ReservationSubmissionRequest is satisfiable the
* {@code ResourceManager} answers with a
* {@link ReservationSubmissionResponse} that include a non-null
* {@link ReservationId}. Upon failure to find a valid allocation the response
* is an exception with the reason.
*
* On application submission the client can use this {@link ReservationId} to
* obtain access to the reserved resources.
* </p>
*
* <p>
* The system guarantees that during the time-range specified by the user, the
* reservationID will be corresponding to a valid reservation. The amount of
* capacity dedicated to such queue can vary overtime, depending of the
* allocation that has been determined. But it is guaranteed to satisfy all
* the constraint expressed by the user in the
* {@link ReservationSubmissionRequest}.
* </p>
*
* @param request the request to submit a new Reservation
* @return response the {@link ReservationId} on accepting the submission
* @throws YarnException if the request is invalid or reservation cannot be
* created successfully
* @throws IOException
*
*/
@Public
@Unstable
@Idempotent
public ReservationSubmissionResponse submitReservation(
ReservationSubmissionRequest request) throws YarnException, IOException;
/**
* <p>
* The interface used by clients to update an existing Reservation. This is
* referred to as a re-negotiation process, in which a user that has
* previously submitted a Reservation.
* </p>
*
* <p>
* The allocation is attempted by virtually substituting all previous
* allocations related to this Reservation with new ones, that satisfy the new
* {@link ReservationUpdateRequest}. Upon success the previous allocation is
* substituted by the new one, and on failure (i.e., if the system cannot find
* a valid allocation for the updated request), the previous allocation
* remains valid.
*
* The {@link ReservationId} is not changed, and applications currently
* running within this reservation will automatically receive the resources
* based on the new allocation.
* </p>
*
* @param request to update an existing Reservation (the ReservationRequest
* should refer to an existing valid {@link ReservationId})
* @return response empty on successfully updating the existing reservation
* @throws YarnException if the request is invalid or reservation cannot be
* updated successfully
* @throws IOException
*
*/
@Public
@Unstable
public ReservationUpdateResponse updateReservation(
ReservationUpdateRequest request) throws YarnException, IOException;
/**
* <p>
* The interface used by clients to remove an existing Reservation.
*
* Upon deletion of a reservation applications running with this reservation,
* are automatically downgraded to normal jobs running without any dedicated
* reservation.
* </p>
*
* @param request to remove an existing Reservation (the ReservationRequest
* should refer to an existing valid {@link ReservationId})
* @return response empty on successfully deleting the existing reservation
* @throws YarnException if the request is invalid or reservation cannot be
* deleted successfully
* @throws IOException
*
*/
@Public
@Unstable
public ReservationDeleteResponse deleteReservation(
ReservationDeleteRequest request) throws YarnException, IOException;
/**
* <p>
* The interface used by clients to get the list of reservations in a plan.
* The reservationId will be used to search for reservations to list if it is
* provided. Otherwise, it will select active reservations within the
* startTime and endTime (inclusive).
* </p>
*
* @param request to list reservations in a plan. Contains fields to select
* String queue, ReservationId reservationId, long startTime,
* long endTime, and a bool includeReservationAllocations.
*
* queue: Required. Cannot be null or empty. Refers to the
* reservable queue in the scheduler that was selected when
* creating a reservation submission
* {@link ReservationSubmissionRequest}.
*
* reservationId: Optional. If provided, other fields will
* be ignored.
*
* startTime: Optional. If provided, only reservations that
* end after the startTime will be selected. This defaults
* to 0 if an invalid number is used.
*
* endTime: Optional. If provided, only reservations that
* start on or before endTime will be selected. This defaults
* to Long.MAX_VALUE if an invalid number is used.
*
* includeReservationAllocations: Optional. Flag that
* determines whether the entire reservation allocations are
* to be returned. Reservation allocations are subject to
* change in the event of re-planning as described by
* {@code ReservationDefinition}.
*
* @return response that contains information about reservations that are
* being searched for.
* @throws YarnException if the request is invalid
* @throws IOException on IO failures
*
*/
@Public
@Unstable
ReservationListResponse listReservations(
ReservationListRequest request) throws YarnException, IOException;
/**
* <p>
* The interface used by client to get node to labels mappings in existing cluster
* </p>
*
* @param request
* @return node to labels mappings
* @throws YarnException
* @throws IOException
*/
@Public
@Unstable
public GetNodesToLabelsResponse getNodeToLabels(
GetNodesToLabelsRequest request) throws YarnException, IOException;
/**
* <p>
* The interface used by client to get labels to nodes mappings
* in existing cluster
* </p>
*
* @param request
* @return labels to nodes mappings
* @throws YarnException
* @throws IOException
*/
@Public
@Unstable
public GetLabelsToNodesResponse getLabelsToNodes(
GetLabelsToNodesRequest request) throws YarnException, IOException;
/**
* <p>
* The interface used by client to get node labels in the cluster
* </p>
*
* @param request to get node labels collection of this cluster
* @return node labels collection of this cluster
* @throws YarnException
* @throws IOException
*/
@Public
@Unstable
public GetClusterNodeLabelsResponse getClusterNodeLabels(
GetClusterNodeLabelsRequest request) throws YarnException, IOException;
/**
* <p>
* The interface used by client to set priority of an application.
* </p>
* @param request to set priority of an application
* @return an empty response
* @throws YarnException
* @throws IOException
*/
@Public
@Unstable
@Idempotent
public UpdateApplicationPriorityResponse updateApplicationPriority(
UpdateApplicationPriorityRequest request) throws YarnException,
IOException;
/**
* <p>The interface used by clients to request the
* <code>ResourceManager</code> to signal a container. For example,
* the client can send command OUTPUT_THREAD_DUMP to dump threads of the
* container.</p>
*
* <p>The client, via {@link SignalContainerRequest} provides the
* id of the container and the signal command. </p>
*
* <p> In secure mode,the <code>ResourceManager</code> verifies access to the
* application before signaling the container.
* The user needs to have <code>MODIFY_APP</code> permission.</p>
*
* <p>Currently, the <code>ResourceManager</code> returns an empty response
* on success and throws an exception on rejecting the request.</p>
*
* @param request request to signal a container
* @return <code>ResourceManager</code> returns an empty response
* on success and throws an exception on rejecting the request
* @throws YarnException
* @throws IOException
*/
@Public
@Unstable
SignalContainerResponse signalToContainer(
SignalContainerRequest request) throws YarnException,
IOException;
/**
* <p>
* The interface used by client to set ApplicationTimeouts of an application.
* The UpdateApplicationTimeoutsRequest should have timeout value with
* absolute time with ISO8601 format <b>yyyy-MM-dd'T'HH:mm:ss.SSSZ</b>.
* </p>
* <b>Note:</b> If application timeout value is less than or equal to current
* time then update application throws YarnException.
* @param request to set ApplicationTimeouts of an application
* @return a response with updated timeouts.
* @throws YarnException if update request has empty values or application is
* in completing states.
* @throws IOException on IO failures
*/
@Public
@Unstable
@Idempotent
public UpdateApplicationTimeoutsResponse updateApplicationTimeouts(
UpdateApplicationTimeoutsRequest request)
throws YarnException, IOException;
/**
* <p>
* The interface used by clients to get all the resource profiles that are
* available on the ResourceManager.
* </p>
* @param request request to get all the resource profiles
* @return Response containing a map of the profile name to Resource
* capabilities
* @throws YARNFeatureNotEnabledException if resource-profile is disabled
* @throws YarnException if any error happens inside YARN
* @throws IOException in case of other errors
*/
@Public
@Unstable
GetAllResourceProfilesResponse getResourceProfiles(
GetAllResourceProfilesRequest request) throws YarnException, IOException;
/**
* <p>
* The interface to get the details for a specific resource profile.
* </p>
* @param request request to get the details of a resource profile
* @return Response containing the details for a particular resource profile
* @throws YARNFeatureNotEnabledException if resource-profile is disabled
* @throws YarnException if any error happens inside YARN
* @throws IOException in case of other errors
*/
@Public
@Unstable
GetResourceProfileResponse getResourceProfile(
GetResourceProfileRequest request) throws YarnException, IOException;
/**
* <p>
* The interface to get the details for a specific resource profile.
* </p>
* @param request request to get the details of a resource profile
* @return Response containing the details for a particular resource profile
* @throws YarnException if any error happens inside YARN
* @throws IOException in case of other errors
*/
@Public
@Unstable
GetAllResourceTypeInfoResponse getResourceTypeInfo(
GetAllResourceTypeInfoRequest request) throws YarnException, IOException;
/**
* <p>
* The interface used by client to get attributes to nodes mappings
* available in ResourceManager.
* </p>
*
* @param request request to get details of attributes to nodes mapping.
* @return Response containing the details of attributes to nodes mappings.
* @throws YarnException if any error happens inside YARN
* @throws IOException incase of other errors
*/
@Public
@Unstable
GetAttributesToNodesResponse getAttributesToNodes(
GetAttributesToNodesRequest request) throws YarnException, IOException;
/**
* <p>
* The interface used by client to get node attributes available in
* ResourceManager.
* </p>
*
* @param request request to get node attributes collection of this cluster.
* @return Response containing node attributes collection.
* @throws YarnException if any error happens inside YARN.
* @throws IOException incase of other errors.
*/
@Public
@Unstable
GetClusterNodeAttributesResponse getClusterNodeAttributes(
GetClusterNodeAttributesRequest request)
throws YarnException, IOException;
/**
* <p>
* The interface used by client to get node to attributes mappings.
* in existing cluster.
* </p>
*
* @param request request to get nodes to attributes mapping.
* @return nodes to attributes mappings.
* @throws YarnException if any error happens inside YARN.
* @throws IOException
*/
@Public
@Unstable
GetNodesToAttributesResponse getNodesToAttributes(
GetNodesToAttributesRequest request) throws YarnException, IOException;
}
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