jihoonson commented on a change in pull request #5492: Native parallel batch indexing without shuffle URL: https://github.com/apache/incubator-druid/pull/5492#discussion_r201891803
########## File path: indexing-service/src/main/java/io/druid/indexing/common/task/ParallelIndexSubTask.java ########## @@ -0,0 +1,451 @@ +/* + * Licensed to Metamarkets Group Inc. (Metamarkets) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. Metamarkets 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 io.druid.indexing.common.task; + +import com.fasterxml.jackson.annotation.JacksonInject; +import com.fasterxml.jackson.annotation.JsonCreator; +import com.fasterxml.jackson.annotation.JsonProperty; +import com.google.common.base.Optional; +import com.google.common.base.Preconditions; +import com.google.common.collect.ImmutableList; +import com.google.common.collect.ImmutableMap; +import io.druid.client.indexing.IndexingServiceClient; +import io.druid.data.input.Firehose; +import io.druid.data.input.FirehoseFactory; +import io.druid.data.input.InputRow; +import io.druid.indexer.TaskStatus; +import io.druid.indexing.appenderator.ActionBasedSegmentAllocator; +import io.druid.indexing.appenderator.ActionBasedUsedSegmentChecker; +import io.druid.indexing.appenderator.CountingActionBasedSegmentAllocator; +import io.druid.indexing.common.TaskLock; +import io.druid.indexing.common.TaskLockType; +import io.druid.indexing.common.TaskToolbox; +import io.druid.indexing.common.actions.LockListAction; +import io.druid.indexing.common.actions.LockTryAcquireAction; +import io.druid.indexing.common.actions.SegmentAllocateAction; +import io.druid.indexing.common.actions.SurrogateAction; +import io.druid.indexing.common.actions.TaskActionClient; +import io.druid.indexing.common.task.IndexTask.IndexIOConfig; +import io.druid.indexing.firehose.IngestSegmentFirehoseFactory; +import io.druid.java.util.common.ISE; +import io.druid.java.util.common.Intervals; +import io.druid.java.util.common.StringUtils; +import io.druid.java.util.common.logger.Logger; +import io.druid.java.util.common.parsers.ParseException; +import io.druid.query.DruidMetrics; +import io.druid.segment.indexing.DataSchema; +import io.druid.segment.indexing.RealtimeIOConfig; +import io.druid.segment.indexing.granularity.GranularitySpec; +import io.druid.segment.realtime.FireDepartment; +import io.druid.segment.realtime.FireDepartmentMetrics; +import io.druid.segment.realtime.RealtimeMetricsMonitor; +import io.druid.segment.realtime.appenderator.Appenderator; +import io.druid.segment.realtime.appenderator.AppenderatorDriverAddResult; +import io.druid.segment.realtime.appenderator.Appenderators; +import io.druid.segment.realtime.appenderator.BaseAppenderatorDriver; +import io.druid.segment.realtime.appenderator.BatchAppenderatorDriver; +import io.druid.segment.realtime.appenderator.SegmentAllocator; +import io.druid.segment.realtime.appenderator.SegmentsAndMetadata; +import io.druid.timeline.DataSegment; +import org.codehaus.plexus.util.FileUtils; +import org.joda.time.Interval; + +import javax.annotation.Nullable; +import java.io.File; +import java.io.IOException; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.SortedSet; +import java.util.concurrent.ExecutionException; +import java.util.concurrent.TimeoutException; +import java.util.stream.Collectors; + +/** + * A worker task of {@link ParallelIndexSupervisorTask}. Similar to {@link IndexTask}, but this task + * generates and pushes segments, and reports them to the {@link ParallelIndexSupervisorTask} instead of + * publishing on its own. + */ +public class ParallelIndexSubTask extends AbstractTask +{ + static final String TYPE = "index_sub"; + + private static final Logger log = new Logger(ParallelIndexSubTask.class); + + private final int numAttempts; + private final ParallelIndexIngestionSpec ingestionSchema; + private final String supervisorTaskId; + private final IndexingServiceClient indexingServiceClient; + private final IndexTaskClientFactory<ParallelIndexTaskClient> taskClientFactory; + + @JsonCreator + public ParallelIndexSubTask( + // id shouldn't be null except when this task is created by ParallelIndexSupervisorTask + @JsonProperty("id") @Nullable final String id, + @JsonProperty("groupId") final String groupId, + @JsonProperty("resource") final TaskResource taskResource, + @JsonProperty("supervisorTaskId") final String supervisorTaskId, + @JsonProperty("numAttempts") final int numAttempts, // zero-based counting + @JsonProperty("spec") final ParallelIndexIngestionSpec ingestionSchema, + @JsonProperty("context") final Map<String, Object> context, + @JacksonInject IndexingServiceClient indexingServiceClient, + @JacksonInject IndexTaskClientFactory<ParallelIndexTaskClient> taskClientFactory + ) + { + super( + getOrMakeId(id, TYPE, ingestionSchema.getDataSchema().getDataSource()), + groupId, + taskResource, + ingestionSchema.getDataSchema().getDataSource(), + context + ); + + if (ingestionSchema.getTuningConfig().isForceGuaranteedRollup()) { + throw new UnsupportedOperationException("Guaranteed rollup is not supported"); + } + + this.numAttempts = numAttempts; + this.ingestionSchema = ingestionSchema; + this.supervisorTaskId = supervisorTaskId; + this.indexingServiceClient = indexingServiceClient; + this.taskClientFactory = taskClientFactory; + } + + @Override + public int getPriority() + { + return getContextValue(Tasks.PRIORITY_KEY, Tasks.DEFAULT_BATCH_INDEX_TASK_PRIORITY); + } + + @Override + public String getType() + { + return TYPE; + } + + @Override + public boolean isReady(TaskActionClient taskActionClient) + { + final Optional<SortedSet<Interval>> intervals = ingestionSchema.getDataSchema() + .getGranularitySpec() + .bucketIntervals(); + + return !intervals.isPresent() || checkLockAcquired(taskActionClient, intervals.get()); + } + + private boolean checkLockAcquired(TaskActionClient actionClient, SortedSet<Interval> intervals) + { + try { + tryAcquireExclusiveSurrogateLocks(actionClient, intervals); + return true; + } + catch (Exception e) { + log.error(e, "Failed to acquire locks for intervals[%s]", intervals); + return false; + } + } + + @JsonProperty + public int getNumAttempts() + { + return numAttempts; + } + + @JsonProperty("spec") + public ParallelIndexIngestionSpec getIngestionSchema() + { + return ingestionSchema; + } + + @JsonProperty + public String getSupervisorTaskId() + { + return supervisorTaskId; + } + + @Override + public TaskStatus run(final TaskToolbox toolbox) throws Exception + { + final boolean explicitIntervals = ingestionSchema.getDataSchema() + .getGranularitySpec() + .bucketIntervals() + .isPresent(); + + final FirehoseFactory firehoseFactory = ingestionSchema.getIOConfig().getFirehoseFactory(); + + if (firehoseFactory instanceof IngestSegmentFirehoseFactory) { + // pass toolbox to Firehose + ((IngestSegmentFirehoseFactory) firehoseFactory).setTaskToolbox(toolbox); + } + + final File firehoseTempDir = toolbox.getFirehoseTemporaryDir(); + // Firehose temporary directory is automatically removed when this IndexTask completes. + FileUtils.forceMkdir(firehoseTempDir); + + final DataSchema dataSchema = ingestionSchema.getDataSchema(); + final Map<Interval, String> versions; + + if (explicitIntervals) { + versions = toolbox.getTaskActionClient().submit(new SurrogateAction<>(supervisorTaskId, new LockListAction())) + .stream() + .collect(Collectors.toMap(TaskLock::getInterval, TaskLock::getVersion)); + } else { + versions = null; + } + + final List<DataSegment> pushedSegments = generateAndPushSegments( + toolbox, + dataSchema, + versions, + firehoseFactory, + firehoseTempDir + ); + final ParallelIndexTaskClient taskClient = taskClientFactory.build( + new ClientBasedTaskInfoProvider(indexingServiceClient), + getId(), + 1, // always use a single http thread + ingestionSchema.getTuningConfig().getChatHandlerTimeout(), + ingestionSchema.getTuningConfig().getChatHandlerNumRetries() + ); + taskClient.report(supervisorTaskId, pushedSegments); + + return TaskStatus.success(getId()); + } + + private Map<Interval, TaskLock> tryAcquireExclusiveSurrogateLocks( + TaskActionClient client, + SortedSet<Interval> intervals + ) + throws IOException + { + final Map<Interval, TaskLock> lockMap = new HashMap<>(); + for (Interval interval : Tasks.computeCompactIntervals(intervals)) { Review comment: Good point. 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