voonhous commented on code in PR #19575: URL: https://github.com/apache/hudi/pull/19575#discussion_r3863381658
########## hudi-client/hudi-client-common/src/main/java/org/apache/hudi/metrics/ExecutorMetrics.java: ########## @@ -0,0 +1,135 @@ +/* + * 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.hudi.metrics; + +import org.apache.hudi.common.metrics.Registry; +import org.apache.hudi.common.util.Option; +import org.apache.hudi.config.HoodieWriteConfig; + +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; + +/** + * Commit-boundary drain for executor-collected metrics, generic over {@link ExecutorMetricRegistry}. On + * the shared commit path, so it covers Spark DataSource, Spark SQL and DeltaStreamer alike. + */ +public class ExecutorMetrics { + + private ExecutorMetrics() { + } + + /** + * Snapshots into commit metadata without consuming. Split from {@link #publishAndRelease} so a commit + * that never lands neither loses its counters nor publishes gauges for rolled-back work. An all-zero + * registry is skipped to keep residue off the timeline; zeros are otherwise kept, since an explicit + * {@code misses=0} is meaningful. + */ + public static DrainedCounters snapshotIntoCommitMetadata(Map<String, String> commitMetadata, + HoodieWriteConfig config) { + return snapshotIntoCommitMetadata(commitMetadata, config, Arrays.asList(ExecutorMetricRegistry.values())); + } + + /** Visible for testing the collection machinery against a group it does not ship with. */ + static DrainedCounters snapshotIntoCommitMetadata(Map<String, String> commitMetadata, + HoodieWriteConfig config, + Collection<? extends ExecutorMetricGroup> groups) { + List<Drained> drained = new ArrayList<>(); + for (ExecutorMetricGroup metricRegistry : groups) { + if (!metricRegistry.isEnabled(config)) { + continue; + } + Registry registry = Registry.REGISTRY_MAP.get( + Registry.makeKey(config.getTableName(), metricRegistry.scopedName(config.getBasePath()))); + if (registry == null) { + continue; + } + Map<String, Long> counts = new HashMap<>(); + boolean recordedSomething = false; + for (Map.Entry<String, Long> counter : registry.getAllCounts(false).entrySet()) { + if (counter.getValue() == null) { + continue; + } + counts.put(counter.getKey(), counter.getValue()); + recordedSomething |= counter.getValue() != 0L; + } + if (!recordedSomething) { + continue; + } + counts.forEach((name, value) -> + commitMetadata.put(metricRegistry.commitMetadataPrefix() + name, String.valueOf(value))); + drained.add(new Drained(metricRegistry, registry, counts)); + } + return drained.isEmpty() ? DrainedCounters.EMPTY : new DrainedCounters(drained); + } + + /** + * Release subtracts what was published rather than clearing, so a straggler task's update arriving after + * the snapshot survives. Publishing here rather than letting the reporter scrape is what lets both sinks + * work at once: {@link Registry#getAllMetrics} consumes the registry when it scrapes. + */ + public static void publishAndRelease(DrainedCounters counters, HoodieMetrics hoodieMetrics) { Review Comment: Carried to #19759 (section E) as a known limitation, and the PR body now states the SQL DML / StreamSync carry-over next to the DataSource one. Resolving on that basis; the one-line fix is still `dd4a48c` if you would rather take it here. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
