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[FLINK-17407] Forward extended resource request to YARN.
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flink-yarn/src/main/java/org/apache/flink/yarn/ResourceInformationReflector.java
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| /* | ||
| * 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 | ||
| * | ||
| * https://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. | ||
| */ | ||
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| package org.apache.flink.yarn; | ||
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| import org.apache.flink.annotation.VisibleForTesting; | ||
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| import org.apache.hadoop.yarn.api.records.Resource; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import javax.annotation.Nullable; | ||
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| import java.lang.reflect.Method; | ||
| import java.util.Collections; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
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| /** | ||
| * Looks up the methods related to org.apache.hadoop.yarn.api.records.Resource#setResourceInformation. | ||
| * Only supported in Hadoop 3.0+ or 2.10+. | ||
| */ | ||
| class ResourceInformationReflector { | ||
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| private static final Logger LOG = LoggerFactory.getLogger(ResourceInformationReflector.class); | ||
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| static final ResourceInformationReflector INSTANCE = new ResourceInformationReflector(); | ||
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| /** Class used to set the extended resource. */ | ||
| private static final String RESOURCE_INFO_CLASS = "org.apache.hadoop.yarn.api.records.ResourceInformation"; | ||
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| /** Could be Null iff isYarnResourceTypesAvailable is false. */ | ||
| @Nullable | ||
| private final Method resourceSetResourceInformationMethod; | ||
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| /** Could be Null iff isYarnResourceTypesAvailable is false. */ | ||
| @Nullable | ||
| private final Method resourceGetResourcesMethod; | ||
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| /** Could be Null iff isYarnResourceTypesAvailable is false. */ | ||
| @Nullable | ||
| private final Method resourceInformationGetNameMethod; | ||
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| /** Could be Null iff isYarnResourceTypesAvailable is false. */ | ||
| @Nullable | ||
| private final Method resourceInformationGetValueMethod; | ||
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| /** Could be Null iff isYarnResourceTypesAvailable is false. */ | ||
| @Nullable | ||
| private final Method resourceInformationNewInstanceMethod; | ||
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| private final boolean isYarnResourceTypesAvailable; | ||
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| private ResourceInformationReflector() { | ||
| this(Resource.class.getName(), RESOURCE_INFO_CLASS); | ||
| } | ||
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| @VisibleForTesting | ||
| ResourceInformationReflector(String resourceClassName, String resourceInfoClassName) { | ||
| Method resourceSetResourceInformationMethod = null; | ||
| Method resourceGetResourcesMethod = null; | ||
| Method resourceInformationGetNameMethod = null; | ||
| Method resourceInformationGetValueMethod = null; | ||
| Method resourceInformationNewInstanceMethod = null; | ||
| boolean isYarnResourceTypesAvailable = false; | ||
| try { | ||
| final Class<?> resourceClass = Class.forName(resourceClassName); | ||
| final Class<?> resourceInfoClass = Class.forName(resourceInfoClassName); | ||
| resourceSetResourceInformationMethod = resourceClass.getMethod("setResourceInformation", String.class, resourceInfoClass); | ||
| resourceGetResourcesMethod = resourceClass.getMethod("getResources"); | ||
| resourceInformationGetNameMethod = resourceInfoClass.getMethod("getName"); | ||
| resourceInformationGetValueMethod = resourceInfoClass.getMethod("getValue"); | ||
| resourceInformationNewInstanceMethod = resourceInfoClass.getMethod("newInstance", String.class, long.class); | ||
| isYarnResourceTypesAvailable = true; | ||
| } catch (Exception e) { | ||
| LOG.debug("The underlying Yarn version does not support external resources.", e); | ||
| } finally { | ||
| this.resourceSetResourceInformationMethod = resourceSetResourceInformationMethod; | ||
| this.resourceGetResourcesMethod = resourceGetResourcesMethod; | ||
| this.resourceInformationGetNameMethod = resourceInformationGetNameMethod; | ||
| this.resourceInformationGetValueMethod = resourceInformationGetValueMethod; | ||
| this.resourceInformationNewInstanceMethod = resourceInformationNewInstanceMethod; | ||
| this.isYarnResourceTypesAvailable = isYarnResourceTypesAvailable; | ||
| } | ||
| } | ||
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| /** | ||
| * Add the given resourceName and value to the {@link Resource}. | ||
| */ | ||
| void setResourceInformation(Resource resource, String resourceName, long amount) { | ||
| setResourceInformationUnSafe(resource, resourceName, amount); | ||
| } | ||
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| /** | ||
| * Same as {@link #setResourceInformation(Resource, String, long)} but | ||
| * allows to pass objects that are not of type {@link Resource}. | ||
| */ | ||
| @VisibleForTesting | ||
| void setResourceInformationUnSafe(Object resource, String resourceName, long amount) { | ||
| if (!isYarnResourceTypesAvailable) { | ||
| LOG.info("Will not request extended resource {} because the used YARN version does not support it.", resourceName); | ||
| return; | ||
| } | ||
| try { | ||
| resourceSetResourceInformationMethod.invoke( | ||
| resource, | ||
| resourceName, | ||
| resourceInformationNewInstanceMethod.invoke(null, resourceName, amount)); | ||
| } catch (Exception e) { | ||
| LOG.warn("Error in setting the external resource {}. Will not request this resource from YARN.", resourceName, e); | ||
| } | ||
| } | ||
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| /** | ||
| * Get the name and value of external resources from the {@link Resource}. | ||
| */ | ||
| Map<String, Long> getExternalResources(Resource resource) { | ||
| return getExternalResourcesUnSafe(resource); | ||
| } | ||
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| /** | ||
| * Same as {@link #getExternalResources(Resource)} but | ||
| * allows to pass objects that are not of type {@link Resource}. | ||
| */ | ||
| @VisibleForTesting | ||
| Map<String, Long> getExternalResourcesUnSafe(Object resource) { | ||
| if (!isYarnResourceTypesAvailable) { | ||
| return Collections.emptyMap(); | ||
| } | ||
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| final Map<String, Long> externalResources = new HashMap<>(); | ||
| final Object[] externalResourcesInfo; | ||
| try { | ||
| externalResourcesInfo = (Object[]) resourceGetResourcesMethod.invoke(resource); | ||
| // The first two element would be cpu and mem. | ||
| for (int i = 2; i < externalResourcesInfo.length; i++) { | ||
| final String name = (String) resourceInformationGetNameMethod.invoke(externalResourcesInfo[i]); | ||
| final long value = (long) resourceInformationGetValueMethod.invoke(externalResourcesInfo[i]); | ||
| externalResources.put(name, value); | ||
| } | ||
| } catch (Exception e) { | ||
| LOG.warn("Could not obtain the external resources supported by the given Resource.", e); | ||
| return Collections.emptyMap(); | ||
| } | ||
| return externalResources; | ||
| } | ||
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| /** | ||
| * Get the name and value of all resources from the {@link Resource}. | ||
| */ | ||
| @VisibleForTesting | ||
| Map<String, Long> getAllResourceInfos(Object resource) { | ||
| if (!isYarnResourceTypesAvailable) { | ||
| return Collections.emptyMap(); | ||
| } | ||
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| final Map<String, Long> externalResources = new HashMap<>(); | ||
| final Object[] externalResourcesInfo; | ||
| try { | ||
| externalResourcesInfo = (Object[]) resourceGetResourcesMethod.invoke(resource); | ||
| for (int i = 0; i < externalResourcesInfo.length; i++) { | ||
| final String name = (String) resourceInformationGetNameMethod.invoke(externalResourcesInfo[i]); | ||
| final long value = (long) resourceInformationGetValueMethod.invoke(externalResourcesInfo[i]); | ||
| externalResources.put(name, value); | ||
| } | ||
| } catch (Exception e) { | ||
| LOG.warn("Could not obtain the external resources supported by the given Resource.", e); | ||
| return Collections.emptyMap(); | ||
| } | ||
| return externalResources; | ||
| } | ||
| } |
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