zentol commented on a change in pull request #13464: URL: https://github.com/apache/flink/pull/13464#discussion_r499373230
########## File path: flink-runtime/src/main/java/org/apache/flink/runtime/resourcemanager/slotmanager/JobScopedResourceTracker.java ########## @@ -0,0 +1,225 @@ +/* + * 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.flink.runtime.resourcemanager.slotmanager; + +import org.apache.flink.api.common.JobID; +import org.apache.flink.runtime.clusterframework.types.ResourceProfile; +import org.apache.flink.runtime.slots.ResourceCounter; +import org.apache.flink.runtime.slots.ResourceRequirement; +import org.apache.flink.util.Preconditions; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Optional; +import java.util.Set; + +/** + * Tracks resource for a single job. + */ +class JobScopedResourceTracker { + + private static final Logger LOG = LoggerFactory.getLogger(JobScopedResourceTracker.class); + + // only for logging purposes + private final JobID jobId; + + private final ResourceCounter resourceRequirements = new ResourceCounter(); + private final BiDirectionalResourceToRequirementMapping resourceToRequirementMapping = new BiDirectionalResourceToRequirementMapping(); + private final ResourceCounter excessResources = new ResourceCounter(); + + JobScopedResourceTracker(JobID jobId) { + this.jobId = Preconditions.checkNotNull(jobId); + } + + public void notifyResourceRequirements(Collection<ResourceRequirement> newResourceRequirements) { + Preconditions.checkNotNull(newResourceRequirements); + + resourceRequirements.clear(); + for (ResourceRequirement newResourceRequirement : newResourceRequirements) { + resourceRequirements.incrementCount(newResourceRequirement.getResourceProfile(), newResourceRequirement.getNumberOfRequiredSlots()); + } + findExcessSlots(); + tryAssigningExcessSlots(); + } + + public void notifyAcquiredResource(ResourceProfile resourceProfile) { + Preconditions.checkNotNull(resourceProfile); + final Optional<ResourceProfile> matchingRequirement = findMatchingRequirement(resourceProfile); + if (matchingRequirement.isPresent()) { + resourceToRequirementMapping.incrementCount(matchingRequirement.get(), resourceProfile, 1); + } else { + LOG.debug("Job {} acquired excess resource {}.", resourceProfile, jobId); + excessResources.incrementCount(resourceProfile, 1); + } + } + + private Optional<ResourceProfile> findMatchingRequirement(ResourceProfile resourceProfile) { + for (Map.Entry<ResourceProfile, Integer> requirementCandidate : resourceRequirements.getResourceProfilesWithCount().entrySet()) { + ResourceProfile requirementProfile = requirementCandidate.getKey(); + + // beware the order when matching resources to requirements, because ResourceProfile.UNKNOWN (which only + // occurs as a requirement) does not match any resource! + if (resourceProfile.isMatching(requirementProfile) && requirementCandidate.getValue() > resourceToRequirementMapping.getNumFulfillingResources(requirementProfile)) { + return Optional.of(requirementProfile); + } + } + return Optional.empty(); + } + + public void notifyLostResource(ResourceProfile resourceProfile) { + Preconditions.checkNotNull(resourceProfile); + if (excessResources.getResourceCount(resourceProfile) > 0) { + LOG.trace("Job {} lost excess resource {}.", jobId, resourceProfile); + excessResources.decrementCount(resourceProfile, 1); + return; + } + + Set<ResourceProfile> fulfilledRequirements = resourceToRequirementMapping.getRequirementsFulfilledBy(resourceProfile).keySet(); + + if (!fulfilledRequirements.isEmpty()) { + // determine for which of the requirements, that the resource could be used for, the resource count should be reduced for + ResourceProfile assignedRequirement = null; + + for (ResourceProfile requirementProfile : fulfilledRequirements) { + assignedRequirement = requirementProfile; + + // try finding a requirement that has too many resources; if non are exceeding the requirements we deduct + // the resource from any requirement having such a resource + if (resourceRequirements.getResourceCount(requirementProfile) < resourceToRequirementMapping.getNumFulfillingResources(requirementProfile)) { + break; + } Review comment: hmm...that is true. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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