swaminathanmanish commented on code in PR #14300: URL: https://github.com/apache/pinot/pull/14300#discussion_r1822224233
########## pinot-plugins/pinot-minion-tasks/pinot-minion-builtin-tasks/src/main/java/org/apache/pinot/plugin/minion/tasks/segmentrefresh/SegmentRefreshTaskGenerator.java: ########## @@ -0,0 +1,167 @@ +/** + * 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.pinot.plugin.minion.tasks.segmentrefresh; + +import com.google.common.base.Preconditions; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; +import org.apache.pinot.common.data.Segment; +import org.apache.pinot.common.metadata.segment.SegmentZKMetadata; +import org.apache.pinot.controller.helix.core.PinotHelixResourceManager; +import org.apache.pinot.controller.helix.core.minion.generator.BaseTaskGenerator; +import org.apache.pinot.controller.helix.core.minion.generator.TaskGeneratorUtils; +import org.apache.pinot.core.common.MinionConstants; +import org.apache.pinot.core.common.MinionConstants.SegmentRefreshTask; +import org.apache.pinot.core.minion.PinotTaskConfig; +import org.apache.pinot.spi.annotations.minion.TaskGenerator; +import org.apache.pinot.spi.config.table.TableConfig; +import org.apache.pinot.spi.config.table.TableTaskConfig; +import org.apache.pinot.spi.config.table.TableType; +import org.apache.pinot.spi.data.Schema; +import org.apache.zookeeper.data.Stat; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +@TaskGenerator +public class SegmentRefreshTaskGenerator extends BaseTaskGenerator { + private static final Logger LOGGER = LoggerFactory.getLogger(SegmentRefreshTaskGenerator.class); + + @Override + public String getTaskType() { + return MinionConstants.SegmentRefreshTask.TASK_TYPE; + } + + @Override + public List<PinotTaskConfig> generateTasks(List<TableConfig> tableConfigs) { + String taskType = MinionConstants.SegmentRefreshTask.TASK_TYPE; + List<PinotTaskConfig> pinotTaskConfigs = new ArrayList<>(); + int tableNumTasks = 0; + + for (TableConfig tableConfig : tableConfigs) { + String tableNameWithType = tableConfig.getTableName(); + LOGGER.info("Start generating SegmentRefresh tasks for table: {}", tableNameWithType); + + // Get the task configs for the table. This is used to restrict the maximum number of allowed tasks per table at + // any given point. + Map<String, String> taskConfigs; + TableTaskConfig tableTaskConfig = tableConfig.getTaskConfig(); + if (tableTaskConfig == null) { + LOGGER.warn("Failed to find task config for table: {}", tableNameWithType); + continue; + } + taskConfigs = tableTaskConfig.getConfigsForTaskType(MinionConstants.SegmentRefreshTask.TASK_TYPE); + Preconditions.checkNotNull(taskConfigs, "Task config shouldn't be null for Table: %s", tableNameWithType); + int tableMaxNumTasks = Integer.MAX_VALUE; + String tableMaxNumTasksConfig = taskConfigs.get(MinionConstants.TABLE_MAX_NUM_TASKS_KEY); + if (tableMaxNumTasksConfig != null) { + try { + tableMaxNumTasks = Integer.parseInt(tableMaxNumTasksConfig); + } catch (Exception e) { + tableMaxNumTasks = Integer.MAX_VALUE; + LOGGER.warn("MaxNumTasks have been wrongly set for table : {}, and task {}", tableNameWithType, taskType); + } + } + + // Get the running segments for a table. + Set<Segment> runningSegments = + TaskGeneratorUtils.getRunningSegments(MinionConstants.SegmentRefreshTask.TASK_TYPE, _clusterInfoAccessor); + + // Make a single ZK call to get the segments. + List<SegmentZKMetadata> allSegments = _clusterInfoAccessor.getSegmentsZKMetadata(tableNameWithType); + + for (SegmentZKMetadata segmentZKMetadata : allSegments) { + String segmentName = segmentZKMetadata.getSegmentName(); + + // Skip consuming segments. + if (tableConfig.getTableType() == TableType.REALTIME && !segmentZKMetadata.getStatus().isCompleted()) { + continue; + } + + // Skip segments for which a task is already running. + if (runningSegments.contains(new Segment(tableNameWithType, segmentZKMetadata.getSegmentName()))) { + continue; + } + + // Skip if we have reached the maximum number of permissible tasks per iteration. + if (tableNumTasks >= tableMaxNumTasks) { + break; + } + + // Skip if the segment is already up-to-date and doesn't have to be refreshed. + if (!shouldRefreshSegment(segmentZKMetadata, tableConfig)) { + continue; + } + + Map<String, String> configs = new HashMap<>(getBaseTaskConfigs(tableConfig, List.of(segmentName))); Review Comment: Do we want to have only one segment per subtask? Could we consider using maxNumRecordsPerTask to have more work per task (make use of the minion) and have fewer subtasks? ########## pinot-plugins/pinot-minion-tasks/pinot-minion-builtin-tasks/src/main/java/org/apache/pinot/plugin/minion/tasks/segmentrefresh/SegmentRefreshTaskExecutor.java: ########## @@ -0,0 +1,200 @@ +/** + * 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.pinot.plugin.minion.tasks.segmentrefresh; + +import java.io.File; +import java.util.Collections; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; +import org.apache.pinot.common.metadata.segment.SegmentZKMetadataCustomMapModifier; +import org.apache.pinot.core.common.MinionConstants; +import org.apache.pinot.core.minion.PinotTaskConfig; +import org.apache.pinot.plugin.minion.tasks.BaseSingleSegmentConversionExecutor; +import org.apache.pinot.plugin.minion.tasks.SegmentConversionResult; +import org.apache.pinot.segment.local.indexsegment.immutable.ImmutableSegmentLoader; +import org.apache.pinot.segment.local.segment.creator.impl.SegmentIndexCreationDriverImpl; +import org.apache.pinot.segment.local.segment.index.loader.IndexLoadingConfig; +import org.apache.pinot.segment.local.segment.readers.PinotSegmentRecordReader; +import org.apache.pinot.segment.spi.ColumnMetadata; +import org.apache.pinot.segment.spi.creator.SegmentGeneratorConfig; +import org.apache.pinot.segment.spi.index.metadata.SegmentMetadataImpl; +import org.apache.pinot.segment.spi.loader.SegmentDirectoryLoaderContext; +import org.apache.pinot.segment.spi.loader.SegmentDirectoryLoaderRegistry; +import org.apache.pinot.segment.spi.store.SegmentDirectory; +import org.apache.pinot.spi.config.table.TableConfig; +import org.apache.pinot.spi.data.FieldSpec; +import org.apache.pinot.spi.data.Schema; +import org.apache.pinot.spi.env.PinotConfiguration; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +public class SegmentRefreshTaskExecutor extends BaseSingleSegmentConversionExecutor { + private static final Logger LOGGER = LoggerFactory.getLogger(SegmentRefreshTaskGenerator.class); + + private long _taskStartTime; + + /** + * The code here currently covers segmentRefresh for the following cases: + * 1. Process newly added columns. + * 2. Addition/removal of indexes. + * 3. Compatible datatype change for existing columns + */ + @Override + protected SegmentConversionResult convert(PinotTaskConfig pinotTaskConfig, File indexDir, File workingDir) + throws Exception { + _eventObserver.notifyProgress(pinotTaskConfig, "Refreshing segment: " + indexDir); + + // We set _taskStartTime before fetching the tableConfig. Task Generation relies on tableConfig/Schema updates + // happening after the last processed time. So we explicity use the timestamp before fetching tableConfig as the + // processedTime. + _taskStartTime = System.currentTimeMillis(); + Map<String, String> configs = pinotTaskConfig.getConfigs(); + String tableNameWithType = configs.get(MinionConstants.TABLE_NAME_KEY); + String segmentName = configs.get(MinionConstants.SEGMENT_NAME_KEY); + String taskType = pinotTaskConfig.getTaskType(); + + LOGGER.info("Starting task: {} with configs: {}", taskType, configs); + + TableConfig tableConfig = getTableConfig(tableNameWithType); + Schema schema = getSchema(tableNameWithType); + + IndexLoadingConfig indexLoadingConfig = new IndexLoadingConfig(tableConfig, schema); + SegmentMetadataImpl segmentMetadata = new SegmentMetadataImpl(indexDir); + PinotConfiguration segmentDirectoryConfigs = indexLoadingConfig.getSegmentDirectoryConfigs(); + SegmentDirectoryLoaderContext segmentLoaderContext = + new SegmentDirectoryLoaderContext.Builder().setTableConfig(indexLoadingConfig.getTableConfig()) + .setSchema(schema) + .setInstanceId(indexLoadingConfig.getInstanceId()) + .setSegmentName(segmentMetadata.getName()) + .setSegmentCrc(segmentMetadata.getCrc()) + .setSegmentDirectoryConfigs(segmentDirectoryConfigs) + .build(); + SegmentDirectory segmentDirectory = + SegmentDirectoryLoaderRegistry.getDefaultSegmentDirectoryLoader().load(indexDir.toURI(), segmentLoaderContext); + + // BaseDefaultColumnHandler part of needPreprocess() does not process any changes to existing columns like datatype, + // change from dimension to metric, etc. + boolean needPreprocess = ImmutableSegmentLoader.needPreprocess(segmentDirectory, indexLoadingConfig, schema); Review Comment: Do we plan to handle transformations/filters (say new derived column gets added and has a new transform function), repartitioning etc, in which case we will need something like SegmentProcessorFramework ########## pinot-plugins/pinot-minion-tasks/pinot-minion-builtin-tasks/src/main/java/org/apache/pinot/plugin/minion/tasks/segmentrefresh/SegmentRefreshTaskGenerator.java: ########## @@ -0,0 +1,167 @@ +/** + * 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.pinot.plugin.minion.tasks.segmentrefresh; + +import com.google.common.base.Preconditions; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; +import org.apache.pinot.common.data.Segment; +import org.apache.pinot.common.metadata.segment.SegmentZKMetadata; +import org.apache.pinot.controller.helix.core.PinotHelixResourceManager; +import org.apache.pinot.controller.helix.core.minion.generator.BaseTaskGenerator; +import org.apache.pinot.controller.helix.core.minion.generator.TaskGeneratorUtils; +import org.apache.pinot.core.common.MinionConstants; +import org.apache.pinot.core.common.MinionConstants.SegmentRefreshTask; +import org.apache.pinot.core.minion.PinotTaskConfig; +import org.apache.pinot.spi.annotations.minion.TaskGenerator; +import org.apache.pinot.spi.config.table.TableConfig; +import org.apache.pinot.spi.config.table.TableTaskConfig; +import org.apache.pinot.spi.config.table.TableType; +import org.apache.pinot.spi.data.Schema; +import org.apache.zookeeper.data.Stat; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +@TaskGenerator +public class SegmentRefreshTaskGenerator extends BaseTaskGenerator { + private static final Logger LOGGER = LoggerFactory.getLogger(SegmentRefreshTaskGenerator.class); + + @Override + public String getTaskType() { + return MinionConstants.SegmentRefreshTask.TASK_TYPE; + } + + @Override + public List<PinotTaskConfig> generateTasks(List<TableConfig> tableConfigs) { + String taskType = MinionConstants.SegmentRefreshTask.TASK_TYPE; + List<PinotTaskConfig> pinotTaskConfigs = new ArrayList<>(); + int tableNumTasks = 0; + + for (TableConfig tableConfig : tableConfigs) { + String tableNameWithType = tableConfig.getTableName(); + LOGGER.info("Start generating SegmentRefresh tasks for table: {}", tableNameWithType); + + // Get the task configs for the table. This is used to restrict the maximum number of allowed tasks per table at + // any given point. + Map<String, String> taskConfigs; + TableTaskConfig tableTaskConfig = tableConfig.getTaskConfig(); + if (tableTaskConfig == null) { + LOGGER.warn("Failed to find task config for table: {}", tableNameWithType); + continue; + } + taskConfigs = tableTaskConfig.getConfigsForTaskType(MinionConstants.SegmentRefreshTask.TASK_TYPE); + Preconditions.checkNotNull(taskConfigs, "Task config shouldn't be null for Table: %s", tableNameWithType); + int tableMaxNumTasks = Integer.MAX_VALUE; + String tableMaxNumTasksConfig = taskConfigs.get(MinionConstants.TABLE_MAX_NUM_TASKS_KEY); + if (tableMaxNumTasksConfig != null) { + try { + tableMaxNumTasks = Integer.parseInt(tableMaxNumTasksConfig); + } catch (Exception e) { + tableMaxNumTasks = Integer.MAX_VALUE; + LOGGER.warn("MaxNumTasks have been wrongly set for table : {}, and task {}", tableNameWithType, taskType); + } + } + + // Get the running segments for a table. + Set<Segment> runningSegments = + TaskGeneratorUtils.getRunningSegments(MinionConstants.SegmentRefreshTask.TASK_TYPE, _clusterInfoAccessor); + + // Make a single ZK call to get the segments. + List<SegmentZKMetadata> allSegments = _clusterInfoAccessor.getSegmentsZKMetadata(tableNameWithType); + + for (SegmentZKMetadata segmentZKMetadata : allSegments) { + String segmentName = segmentZKMetadata.getSegmentName(); + + // Skip consuming segments. + if (tableConfig.getTableType() == TableType.REALTIME && !segmentZKMetadata.getStatus().isCompleted()) { + continue; + } + + // Skip segments for which a task is already running. + if (runningSegments.contains(new Segment(tableNameWithType, segmentZKMetadata.getSegmentName()))) { + continue; + } + + // Skip if we have reached the maximum number of permissible tasks per iteration. + if (tableNumTasks >= tableMaxNumTasks) { + break; + } + + // Skip if the segment is already up-to-date and doesn't have to be refreshed. + if (!shouldRefreshSegment(segmentZKMetadata, tableConfig)) { + continue; + } + + Map<String, String> configs = new HashMap<>(getBaseTaskConfigs(tableConfig, List.of(segmentName))); + configs.put(MinionConstants.DOWNLOAD_URL_KEY, segmentZKMetadata.getDownloadUrl()); + configs.put(MinionConstants.UPLOAD_URL_KEY, _clusterInfoAccessor.getVipUrl() + "/segments"); + configs.put(MinionConstants.ORIGINAL_SEGMENT_CRC_KEY, String.valueOf(segmentZKMetadata.getCrc())); + pinotTaskConfigs.add(new PinotTaskConfig(taskType, configs)); + tableNumTasks++; + } + + LOGGER.info("Finished generating {} tasks configs for table: {} " + "for task: {}", tableNumTasks, + tableNameWithType, taskType); + } + + return pinotTaskConfigs; + } + + /** + * We need not refresh when: There were no tableConfig or schema updates after the last time the segment was + * refreshed by this task. + * + * Note that newly created segments after the latest tableConfig/schema update will still need to be refreshed. This + * is because inverted index created is disabled by default during segment generation. This can be added as an + * additional check in the future, if required. + */ + private boolean shouldRefreshSegment(SegmentZKMetadata segmentZKMetadata, TableConfig tableConfig) { Review Comment: Would any table update kick off subtasks? Even ifs unrelated, we would have minion subtasks being kicked off and eventually turn out to be a no-op? Did you consider doing the table divergence check in the task generator itself, to not kick off subtasks if there's no difference in index config. ########## pinot-plugins/pinot-minion-tasks/pinot-minion-builtin-tasks/src/main/java/org/apache/pinot/plugin/minion/tasks/segmentrefresh/SegmentRefreshTaskGenerator.java: ########## @@ -0,0 +1,167 @@ +/** + * 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.pinot.plugin.minion.tasks.segmentrefresh; + +import com.google.common.base.Preconditions; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; +import org.apache.pinot.common.data.Segment; +import org.apache.pinot.common.metadata.segment.SegmentZKMetadata; +import org.apache.pinot.controller.helix.core.PinotHelixResourceManager; +import org.apache.pinot.controller.helix.core.minion.generator.BaseTaskGenerator; +import org.apache.pinot.controller.helix.core.minion.generator.TaskGeneratorUtils; +import org.apache.pinot.core.common.MinionConstants; +import org.apache.pinot.core.common.MinionConstants.SegmentRefreshTask; +import org.apache.pinot.core.minion.PinotTaskConfig; +import org.apache.pinot.spi.annotations.minion.TaskGenerator; +import org.apache.pinot.spi.config.table.TableConfig; +import org.apache.pinot.spi.config.table.TableTaskConfig; +import org.apache.pinot.spi.config.table.TableType; +import org.apache.pinot.spi.data.Schema; +import org.apache.zookeeper.data.Stat; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +@TaskGenerator +public class SegmentRefreshTaskGenerator extends BaseTaskGenerator { + private static final Logger LOGGER = LoggerFactory.getLogger(SegmentRefreshTaskGenerator.class); + + @Override + public String getTaskType() { + return MinionConstants.SegmentRefreshTask.TASK_TYPE; + } + + @Override + public List<PinotTaskConfig> generateTasks(List<TableConfig> tableConfigs) { + String taskType = MinionConstants.SegmentRefreshTask.TASK_TYPE; + List<PinotTaskConfig> pinotTaskConfigs = new ArrayList<>(); + int tableNumTasks = 0; + + for (TableConfig tableConfig : tableConfigs) { + String tableNameWithType = tableConfig.getTableName(); + LOGGER.info("Start generating SegmentRefresh tasks for table: {}", tableNameWithType); + + // Get the task configs for the table. This is used to restrict the maximum number of allowed tasks per table at + // any given point. + Map<String, String> taskConfigs; + TableTaskConfig tableTaskConfig = tableConfig.getTaskConfig(); + if (tableTaskConfig == null) { + LOGGER.warn("Failed to find task config for table: {}", tableNameWithType); + continue; + } + taskConfigs = tableTaskConfig.getConfigsForTaskType(MinionConstants.SegmentRefreshTask.TASK_TYPE); + Preconditions.checkNotNull(taskConfigs, "Task config shouldn't be null for Table: %s", tableNameWithType); + int tableMaxNumTasks = Integer.MAX_VALUE; Review Comment: For a large table with a number of segments (eg: 50K segments), you could end up kicking off large number of tasks and overwhelm Zk. Perhaps have a resonable upper bound for the default ? ########## pinot-plugins/pinot-minion-tasks/pinot-minion-builtin-tasks/src/main/java/org/apache/pinot/plugin/minion/tasks/segmentrefresh/SegmentRefreshTaskExecutor.java: ########## @@ -0,0 +1,200 @@ +/** + * 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.pinot.plugin.minion.tasks.segmentrefresh; + +import java.io.File; +import java.util.Collections; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; +import org.apache.pinot.common.metadata.segment.SegmentZKMetadataCustomMapModifier; +import org.apache.pinot.core.common.MinionConstants; +import org.apache.pinot.core.minion.PinotTaskConfig; +import org.apache.pinot.plugin.minion.tasks.BaseSingleSegmentConversionExecutor; +import org.apache.pinot.plugin.minion.tasks.SegmentConversionResult; +import org.apache.pinot.segment.local.indexsegment.immutable.ImmutableSegmentLoader; +import org.apache.pinot.segment.local.segment.creator.impl.SegmentIndexCreationDriverImpl; +import org.apache.pinot.segment.local.segment.index.loader.IndexLoadingConfig; +import org.apache.pinot.segment.local.segment.readers.PinotSegmentRecordReader; +import org.apache.pinot.segment.spi.ColumnMetadata; +import org.apache.pinot.segment.spi.creator.SegmentGeneratorConfig; +import org.apache.pinot.segment.spi.index.metadata.SegmentMetadataImpl; +import org.apache.pinot.segment.spi.loader.SegmentDirectoryLoaderContext; +import org.apache.pinot.segment.spi.loader.SegmentDirectoryLoaderRegistry; +import org.apache.pinot.segment.spi.store.SegmentDirectory; +import org.apache.pinot.spi.config.table.TableConfig; +import org.apache.pinot.spi.data.FieldSpec; +import org.apache.pinot.spi.data.Schema; +import org.apache.pinot.spi.env.PinotConfiguration; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +public class SegmentRefreshTaskExecutor extends BaseSingleSegmentConversionExecutor { + private static final Logger LOGGER = LoggerFactory.getLogger(SegmentRefreshTaskGenerator.class); + + private long _taskStartTime; + + /** + * The code here currently covers segmentRefresh for the following cases: + * 1. Process newly added columns. + * 2. Addition/removal of indexes. + * 3. Compatible datatype change for existing columns + */ + @Override + protected SegmentConversionResult convert(PinotTaskConfig pinotTaskConfig, File indexDir, File workingDir) + throws Exception { + _eventObserver.notifyProgress(pinotTaskConfig, "Refreshing segment: " + indexDir); + + // We set _taskStartTime before fetching the tableConfig. Task Generation relies on tableConfig/Schema updates + // happening after the last processed time. So we explicity use the timestamp before fetching tableConfig as the + // processedTime. + _taskStartTime = System.currentTimeMillis(); Review Comment: Checking for table divergence in the task generator, between segment metadata & table config, will avoid this state/make the detection stateless. getSegmentsMetadata in TableMetadataReader, gives the segment metadata and we can compare the metadata with table config to determine which ones need Refresh, in the generator itself. -- 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: commits-unsubscr...@pinot.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For additional commands, e-mail: commits-h...@pinot.apache.org
