stevenzwu commented on code in PR #10179: URL: https://github.com/apache/iceberg/pull/10179#discussion_r1621389662
########## flink/v1.19/flink/src/main/java/org/apache/iceberg/flink/sink/committer/SinkCommitter.java: ########## @@ -0,0 +1,463 @@ +/* + * 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.iceberg.flink.sink.committer; + +import java.io.IOException; +import java.io.Serializable; +import java.util.Arrays; +import java.util.Collection; +import java.util.Comparator; +import java.util.List; +import java.util.Map; +import java.util.NavigableMap; +import java.util.SortedMap; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.TimeUnit; +import org.apache.flink.api.common.state.ListStateDescriptor; +import org.apache.flink.api.common.typeinfo.BasicTypeInfo; +import org.apache.flink.api.common.typeinfo.PrimitiveArrayTypeInfo; +import org.apache.flink.api.connector.sink2.Committer; +import org.apache.flink.core.io.SimpleVersionedSerialization; +import org.apache.flink.table.runtime.typeutils.SortedMapTypeInfo; +import org.apache.iceberg.AppendFiles; +import org.apache.iceberg.DataFile; +import org.apache.iceberg.DeleteFile; +import org.apache.iceberg.ManifestFile; +import org.apache.iceberg.ManifestFiles; +import org.apache.iceberg.PartitionSpec; +import org.apache.iceberg.ReplacePartitions; +import org.apache.iceberg.RowDelta; +import org.apache.iceberg.Snapshot; +import org.apache.iceberg.SnapshotUpdate; +import org.apache.iceberg.Table; +import org.apache.iceberg.flink.TableLoader; +import org.apache.iceberg.flink.sink.CommitSummary; +import org.apache.iceberg.flink.sink.DeltaManifests; +import org.apache.iceberg.flink.sink.DeltaManifestsSerializer; +import org.apache.iceberg.flink.sink.IcebergFilesCommitterMetrics; +import org.apache.iceberg.io.CloseableIterable; +import org.apache.iceberg.io.FileIO; +import org.apache.iceberg.io.WriteResult; +import org.apache.iceberg.relocated.com.google.common.annotations.VisibleForTesting; +import org.apache.iceberg.relocated.com.google.common.base.MoreObjects; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.relocated.com.google.common.collect.Maps; +import org.apache.iceberg.types.Comparators; +import org.apache.iceberg.types.Types; +import org.apache.iceberg.util.PropertyUtil; +import org.apache.iceberg.util.ThreadPools; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * This class implements the Flink SinkV2 {@link Committer} interface to implement the Iceberg + * commits. The implementation builds on the following assumptions: + * + * <ul> + * <li>There is a single {@link SinkCommittable} for every checkpoint + * <li>There is no late checkpoint - if checkpoint 'x' has received in one call, then after a + * successful run only checkpoints > x will arrive + * <li>There is no other writer which would generate another commit to the same branch with the + * same jobId-operatorId-checkpointId triplet + * </ul> + */ +public class SinkCommitter implements Committer<SinkCommittable>, Serializable { + private static final long serialVersionUID = 1L; + private static final String MAX_COMMITTED_CHECKPOINT_ID = "flink.max-committed-checkpoint-id"; + private static final Logger LOG = LoggerFactory.getLogger(SinkCommitter.class); + private static final byte[] EMPTY_MANIFEST_DATA = new byte[0]; + private static final CommitRequest<SinkCommittable> EMPTY_COMMIT_REQUEST = + new CommitRequest<SinkCommittable>() { + @Override + public SinkCommittable getCommittable() { + return new SinkCommittable(EMPTY_MANIFEST_DATA, "jobId", "operatorId", -1L); + } + + @Override + public int getNumberOfRetries() { + return 0; + } + + @Override + public void signalFailedWithKnownReason(Throwable t) {} + + @Override + public void signalFailedWithUnknownReason(Throwable t) {} + + @Override + public void retryLater() {} + + @Override + public void updateAndRetryLater(SinkCommittable committable) {} + + @Override + public void signalAlreadyCommitted() {} + }; + + @VisibleForTesting + static final String MAX_CONTINUOUS_EMPTY_COMMITS = "flink.max-continuous-empty-commits"; + + public static final long INITIAL_CHECKPOINT_ID = -1L; + public static final String FLINK_JOB_ID = "flink.job-id"; + public static final String OPERATOR_ID = "flink.operator-id"; + private final String branch; + private final Map<String, String> snapshotProperties; + private final boolean replacePartitions; + private final int workerPoolSize; + private final String prefix; + private transient IcebergFilesCommitterMetrics committerMetrics; + private transient Table table; + private transient int maxContinuousEmptyCommits; + private transient ExecutorService workerPool; + private transient int continuousEmptyCheckpoints = 0; + + public SinkCommitter( + TableLoader tableLoader, + String branch, + Map<String, String> snapshotProperties, + boolean replacePartitions, + int workerPoolSize, + String prefix, + IcebergFilesCommitterMetrics committerMetrics) { + this.branch = branch; + this.snapshotProperties = snapshotProperties; + this.replacePartitions = replacePartitions; + this.workerPoolSize = workerPoolSize; + this.prefix = prefix; + this.committerMetrics = committerMetrics; + + if (!tableLoader.isOpen()) { + tableLoader.open(); + } + + this.table = tableLoader.loadTable(); + this.maxContinuousEmptyCommits = + PropertyUtil.propertyAsInt(table.properties(), MAX_CONTINUOUS_EMPTY_COMMITS, 10); + Preconditions.checkArgument( + maxContinuousEmptyCommits > 0, MAX_CONTINUOUS_EMPTY_COMMITS + " must be positive"); + this.workerPool = + ThreadPools.newWorkerPool("iceberg-worker-pool-" + table + "-" + prefix, workerPoolSize); + this.continuousEmptyCheckpoints = 0; + } + + @Override + public void commit(Collection<CommitRequest<SinkCommittable>> commitRequests) + throws IOException, InterruptedException { + NavigableMap<Long, byte[]> manifestMap = Maps.newTreeMap(); + NavigableMap<Long, CommitRequest<SinkCommittable>> commitRequestMap = Maps.newTreeMap(); + + if (commitRequests.isEmpty()) { + commitRequests.add(EMPTY_COMMIT_REQUEST); + } + + for (CommitRequest<SinkCommittable> request : commitRequests) { + manifestMap.put(request.getCommittable().checkpointId(), request.getCommittable().manifest()); + commitRequestMap.put(request.getCommittable().checkpointId(), request); + } + + long maxCommittedCheckpointId = getMaxCommittedCheckpointId(commitRequestMap); + + // Mark the already committed FilesCommittable(s) as finished + commitRequestMap + .headMap(maxCommittedCheckpointId, true) + .values() + .forEach(CommitRequest::signalAlreadyCommitted); + + // Commit the remaining + SinkCommittable last = commitRequestMap.lastEntry().getValue().getCommittable(); + + NavigableMap<Long, byte[]> uncommitted = + Maps.newTreeMap(manifestMap).tailMap(maxCommittedCheckpointId, false); + if (!uncommitted.isEmpty()) { + commitUpToCheckpoint(uncommitted, last.jobId(), last.operatorId(), last.checkpointId()); Review Comment: yeah. `CheckpointCommittableManagerImpl` marks those requests as committed if the commit doesn't throw an exception. but then why is `CommitRequest` even exposed to `Committer`. Let's say hypothetically IcebergCommitter wants to `signalFailedWithUnknownReason`. it will be ignored by the `CheckpointCommittableManagerImpl` which always call `CommitRequestImpl::setCommittedIfNoError` if no exception is thrown. A bit weird. ``` @Override public Collection<CommittableWithLineage<CommT>> commit( boolean fullyReceived, Committer<CommT> committer) throws IOException, InterruptedException { Collection<CommitRequestImpl<CommT>> requests = getPendingRequests(fullyReceived); requests.forEach(CommitRequestImpl::setSelected); committer.commit(new ArrayList<>(requests)); requests.forEach(CommitRequestImpl::setCommittedIfNoError); Collection<CommittableWithLineage<CommT>> committed = drainFinished(); metricGroup.setCurrentPendingCommittablesGauge(() -> getPendingRequests(false).size()); return committed; } ``` -- 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. 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