pvary commented on code in PR #11497: URL: https://github.com/apache/iceberg/pull/11497#discussion_r1871013622
########## flink/v1.20/flink/src/main/java/org/apache/iceberg/flink/maintenance/operator/DataFileRewriteExecutor.java: ########## @@ -0,0 +1,257 @@ +/* + * 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.maintenance.operator; + +import static org.apache.iceberg.TableProperties.DEFAULT_NAME_MAPPING; + +import java.util.Collections; +import java.util.Set; +import org.apache.flink.annotation.Internal; +import org.apache.flink.annotation.VisibleForTesting; +import org.apache.flink.configuration.Configuration; +import org.apache.flink.metrics.Counter; +import org.apache.flink.streaming.api.functions.ProcessFunction; +import org.apache.flink.table.data.RowData; +import org.apache.flink.util.Collector; +import org.apache.iceberg.BaseCombinedScanTask; +import org.apache.iceberg.DataFile; +import org.apache.iceberg.FileFormat; +import org.apache.iceberg.TableProperties; +import org.apache.iceberg.actions.RewriteFileGroup; +import org.apache.iceberg.flink.FlinkSchemaUtil; +import org.apache.iceberg.flink.maintenance.operator.DataFileRewritePlanner.PlannedGroup; +import org.apache.iceberg.flink.sink.RowDataTaskWriterFactory; +import org.apache.iceberg.flink.sink.TaskWriterFactory; +import org.apache.iceberg.flink.source.DataIterator; +import org.apache.iceberg.flink.source.FileScanTaskReader; +import org.apache.iceberg.flink.source.RowDataFileScanTaskReader; +import org.apache.iceberg.io.TaskWriter; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.relocated.com.google.common.collect.Sets; +import org.apache.iceberg.util.PropertyUtil; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Executes a rewrite for a single {@link PlannedGroup}. Reads the files with the standard {@link + * FileScanTaskReader}, so the delete files are considered, and writes using the {@link + * TaskWriterFactory}. The output is an {@link ExecutedGroup}. + */ +@Internal +public class DataFileRewriteExecutor + extends ProcessFunction<PlannedGroup, DataFileRewriteExecutor.ExecutedGroup> { + private static final Logger LOG = LoggerFactory.getLogger(DataFileRewriteExecutor.class); + + private final String tableName; + private final String taskName; + private final int taskIndex; + + private transient int subTaskId; + private transient int attemptId; + private transient Counter errorCounter; + + public DataFileRewriteExecutor(String tableName, String taskName, int taskIndex) { + Preconditions.checkNotNull(tableName, "Table name should no be null"); + Preconditions.checkNotNull(taskName, "Task name should no be null"); + this.tableName = tableName; + this.taskName = taskName; + this.taskIndex = taskIndex; + } + + @Override + public void open(Configuration parameters) { + this.errorCounter = + TableMaintenanceMetrics.groupFor(getRuntimeContext(), tableName, taskName, taskIndex) + .counter(TableMaintenanceMetrics.ERROR_COUNTER); + + this.subTaskId = getRuntimeContext().getTaskInfo().getIndexOfThisSubtask(); + this.attemptId = getRuntimeContext().getTaskInfo().getAttemptNumber(); + } + + @Override + public void processElement(PlannedGroup value, Context ctx, Collector<ExecutedGroup> out) + throws Exception { + if (LOG.isDebugEnabled()) { + LOG.debug( + LogUtil.MESSAGE_PREFIX + "Rewriting files {} from {}", + tableName, + taskName, + taskIndex, + ctx.timestamp(), + value.group().info(), + value.group().rewrittenFiles()); + } else { + LOG.info( + LogUtil.MESSAGE_PREFIX + "Rewriting {} files", + tableName, + taskName, + taskIndex, + ctx.timestamp(), + value.group().rewrittenFiles().size()); + } + + try (TaskWriter<RowData> writer = writerFor(value)) { + try (DataIterator<RowData> iterator = readerFor(value)) { + while (iterator.hasNext()) { + writer.write(iterator.next()); + } + + Set<DataFile> dataFiles = Sets.newHashSet(writer.dataFiles()); + value.group().setOutputFiles(dataFiles); + out.collect( + new ExecutedGroup( + value.table().currentSnapshot().snapshotId(), + value.groupsPerCommit(), + value.group())); + if (LOG.isDebugEnabled()) { + LOG.debug( + LogUtil.MESSAGE_PREFIX + "Rewritten files {} from {} to {}", + tableName, + taskName, + taskIndex, + ctx.timestamp(), + value.group().info(), + value.group().rewrittenFiles(), + value.group().addedFiles()); + } else { + LOG.info( + LogUtil.MESSAGE_PREFIX + "Rewritten {} files to {} files", + tableName, + taskName, + taskIndex, + ctx.timestamp(), + value.group().rewrittenFiles().size(), + value.group().addedFiles().size()); + } + } catch (Exception ex) { + LOG.info( + LogUtil.MESSAGE_PREFIX + "Exception rewriting datafile group {}", + tableName, + taskName, + taskIndex, + ctx.timestamp(), + value.group(), + ex); + ctx.output(TaskResultAggregator.ERROR_STREAM, ex); + errorCounter.inc(); + abort(writer, ctx.timestamp()); + } + } catch (Exception ex) { + LOG.info( + LogUtil.MESSAGE_PREFIX + "Exception creating compaction writer for group {}", + tableName, + taskName, + taskIndex, + ctx.timestamp(), + value.group(), + ex); + ctx.output(TaskResultAggregator.ERROR_STREAM, ex); + errorCounter.inc(); + } + } + + private TaskWriter<RowData> writerFor(PlannedGroup value) { + String formatString = + PropertyUtil.propertyAsString( + value.table().properties(), + TableProperties.DEFAULT_FILE_FORMAT, + TableProperties.DEFAULT_FILE_FORMAT_DEFAULT); + RowDataTaskWriterFactory factory = + new RowDataTaskWriterFactory( + value.table(), + FlinkSchemaUtil.convert(value.table().schema()), + value.splitSize(), + FileFormat.fromString(formatString), + value.table().properties(), + null, + false); + factory.initialize(subTaskId, attemptId); + return factory.create(); + } + + private DataIterator<RowData> readerFor(PlannedGroup value) { + RowDataFileScanTaskReader reader = + new RowDataFileScanTaskReader( + value.table().schema(), + value.table().schema(), + PropertyUtil.propertyAsString(value.table().properties(), DEFAULT_NAME_MAPPING, null), + false, Review Comment: We can add a new config to set this, but I don't see too much value. 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