phet commented on code in PR #3938: URL: https://github.com/apache/gobblin/pull/3938#discussion_r1594904360
########## gobblin-service/src/main/java/org/apache/gobblin/service/modules/orchestration/proc/ResumeDagProc.java: ########## @@ -0,0 +1,111 @@ +/* + * 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.gobblin.service.modules.orchestration.proc; + +import java.io.IOException; +import java.util.Map; +import java.util.Optional; +import java.util.Set; + +import com.google.common.collect.Maps; + +import lombok.extern.slf4j.Slf4j; + +import org.apache.gobblin.metrics.event.TimingEvent; +import org.apache.gobblin.service.ExecutionStatus; +import org.apache.gobblin.service.modules.flowgraph.Dag; +import org.apache.gobblin.service.modules.orchestration.DagManagementStateStore; +import org.apache.gobblin.service.modules.orchestration.DagManagerUtils; +import org.apache.gobblin.service.modules.orchestration.TimingEventUtils; +import org.apache.gobblin.service.modules.orchestration.task.ResumeDagTask; +import org.apache.gobblin.service.modules.spec.JobExecutionPlan; + +import static org.apache.gobblin.service.ExecutionStatus.CANCELLED; +import static org.apache.gobblin.service.ExecutionStatus.FAILED; +import static org.apache.gobblin.service.ExecutionStatus.PENDING_RESUME; + + +/** + * An implementation for {@link DagProc} that resumes a dag and submits the job that failed/killed previously. + */ +@Slf4j +public class ResumeDagProc extends DagProc<Optional<Dag<JobExecutionPlan>>> { + + public ResumeDagProc(ResumeDagTask resumeDagTask) { + super(resumeDagTask); + } + + @Override + protected Optional<Dag<JobExecutionPlan>> initialize(DagManagementStateStore dagManagementStateStore) + throws IOException { + return dagManagementStateStore.getFailedDag(getDagId()); + } + + @Override + protected void act(DagManagementStateStore dagManagementStateStore, Optional<Dag<JobExecutionPlan>> dag) + throws IOException { + log.info("Request to resume dag {}", getDagId()); + + if (!dag.isPresent()) { + // todo - add a metric here + log.error("Dag " + dagId + " was not found in dag state store"); + return; + } + + long flowResumeTime = System.currentTimeMillis(); + + // Set the flow and its failed or cancelled nodes to PENDING_RESUME so that the flow will be resumed from the point before it failed + DagManagerUtils.emitFlowEvent(eventSubmitter, dag.get(), TimingEvent.FlowTimings.FLOW_PENDING_RESUME); + + for (Dag.DagNode<JobExecutionPlan> node : dag.get().getNodes()) { + ExecutionStatus executionStatus = node.getValue().getExecutionStatus(); + if (executionStatus.equals(FAILED) || executionStatus.equals(CANCELLED)) { + node.getValue().setExecutionStatus(PENDING_RESUME); + // reset currentAttempts because we do not want to count previous execution's attempts in deciding whether to retry a job + node.getValue().setCurrentAttempts(0); + DagManagerUtils.incrementJobGeneration(node); + Map<String, String> jobMetadata = TimingEventUtils.getJobMetadata(Maps.newHashMap(), node.getValue()); + eventSubmitter.getTimingEvent(TimingEvent.LauncherTimings.JOB_PENDING_RESUME).stop(jobMetadata); + } + // Set flowStartTime so that flow SLA will be based on current time instead of original flow + node.getValue().setFlowStartTime(flowResumeTime); + } + + dagManagementStateStore.checkpointDag(dag.get()); + dagManagementStateStore.deleteFailedDag(dag.get()); + resumeDag(dagManagementStateStore, dag.get()); + } + + private void resumeDag(DagManagementStateStore dagManagementStateStore, Dag<JobExecutionPlan> dag) { + Set<Dag.DagNode<JobExecutionPlan>> nextNodes = DagManagerUtils.getNext(dag); + + if (nextNodes.size() > 1) { + handleMultipleJobs(nextNodes); + } + + //Submit jobs from the dag ready for execution. + for (Dag.DagNode<JobExecutionPlan> dagNode : nextNodes) { + DagProcUtils.submitJobToExecutor(dagManagementStateStore, dagNode, getDagId()); + log.info("Submitted job {} for dagId {}", DagManagerUtils.getJobName(dagNode), getDagId()); + } + } + + private void handleMultipleJobs(Set<Dag.DagNode<JobExecutionPlan>> nextNodes) { + throw new UnsupportedOperationException("More than one start job is not allowed"); + } Review Comment: once this PR is merged, I believe we'll be ready to implement this (all three cases)! -- This is an automated message from the Apache Git Service. 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