org.apache.flink.runtime.rest.handler.legacy.SubtasksTimesHandler Maven / Gradle / Ivy
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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
*
* 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.rest.handler.legacy;
import org.apache.flink.runtime.execution.ExecutionState;
import org.apache.flink.runtime.executiongraph.AccessExecutionGraph;
import org.apache.flink.runtime.executiongraph.AccessExecutionJobVertex;
import org.apache.flink.runtime.executiongraph.AccessExecutionVertex;
import org.apache.flink.runtime.taskmanager.TaskManagerLocation;
import org.apache.flink.runtime.webmonitor.history.ArchivedJson;
import org.apache.flink.runtime.webmonitor.history.JsonArchivist;
import org.apache.flink.util.FlinkException;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.core.JsonGenerator;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionException;
import java.util.concurrent.Executor;
/**
* Request handler that returns the state transition timestamps for all subtasks, plus their
* location and duration.
*/
public class SubtasksTimesHandler extends AbstractJobVertexRequestHandler {
private static final String SUBTASK_TIMES_REST_PATH = "/jobs/:jobid/vertices/:vertexid/subtasktimes";
public SubtasksTimesHandler(ExecutionGraphCache executionGraphHolder, Executor executor) {
super(executionGraphHolder, executor);
}
@Override
public String[] getPaths() {
return new String[]{SUBTASK_TIMES_REST_PATH};
}
@Override
public CompletableFuture handleRequest(AccessExecutionJobVertex jobVertex, Map params) {
return CompletableFuture.supplyAsync(
() -> {
try {
return createSubtaskTimesJson(jobVertex);
} catch (IOException e) {
throw new CompletionException(new FlinkException("Could not write subtask time json.", e));
}
},
executor);
}
/**
* Archivist for the SubtasksTimesHandler.
*/
public static class SubtasksTimesJsonArchivist implements JsonArchivist {
@Override
public Collection archiveJsonWithPath(AccessExecutionGraph graph) throws IOException {
List archive = new ArrayList<>();
for (AccessExecutionJobVertex task : graph.getAllVertices().values()) {
String json = createSubtaskTimesJson(task);
String path = SUBTASK_TIMES_REST_PATH
.replace(":jobid", graph.getJobID().toString())
.replace(":vertexid", task.getJobVertexId().toString());
archive.add(new ArchivedJson(path, json));
}
return archive;
}
}
public static String createSubtaskTimesJson(AccessExecutionJobVertex jobVertex) throws IOException {
final long now = System.currentTimeMillis();
StringWriter writer = new StringWriter();
JsonGenerator gen = JsonFactory.JACKSON_FACTORY.createGenerator(writer);
gen.writeStartObject();
gen.writeStringField("id", jobVertex.getJobVertexId().toString());
gen.writeStringField("name", jobVertex.getName());
gen.writeNumberField("now", now);
gen.writeArrayFieldStart("subtasks");
int num = 0;
for (AccessExecutionVertex vertex : jobVertex.getTaskVertices()) {
long[] timestamps = vertex.getCurrentExecutionAttempt().getStateTimestamps();
ExecutionState status = vertex.getExecutionState();
long scheduledTime = timestamps[ExecutionState.SCHEDULED.ordinal()];
long start = scheduledTime > 0 ? scheduledTime : -1;
long end = status.isTerminal() ? timestamps[status.ordinal()] : now;
long duration = start >= 0 ? end - start : -1L;
gen.writeStartObject();
gen.writeNumberField("subtask", num++);
TaskManagerLocation location = vertex.getCurrentAssignedResourceLocation();
String locationString = location == null ? "(unassigned)" : location.getHostname();
gen.writeStringField("host", locationString);
gen.writeNumberField("duration", duration);
gen.writeObjectFieldStart("timestamps");
for (ExecutionState state : ExecutionState.values()) {
gen.writeNumberField(state.name(), timestamps[state.ordinal()]);
}
gen.writeEndObject();
gen.writeEndObject();
}
gen.writeEndArray();
gen.writeEndObject();
gen.close();
return writer.toString();
}
}