somandal commented on code in PR #14894: URL: https://github.com/apache/pinot/pull/14894#discussion_r1929448062
########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/utils/SegmentPreprocessThrottler.java: ########## @@ -0,0 +1,212 @@ +/** + * 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.segment.local.utils; + +import com.google.common.annotations.VisibleForTesting; +import com.google.common.base.Preconditions; +import java.util.Map; +import java.util.Set; +import org.apache.pinot.common.concurrency.AdjustableSemaphore; +import org.apache.pinot.spi.config.provider.PinotClusterConfigChangeListener; +import org.apache.pinot.spi.utils.CommonConstants; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +/** + * Used to throttle the total concurrent index rebuilds that can happen on a given Pinot server. + * Code paths that do no need to rebuild the index or which don't happen on the server need not utilize this throttler. + */ +public class SegmentPreprocessThrottler implements PinotClusterConfigChangeListener { + private static final Logger LOGGER = LoggerFactory.getLogger(SegmentPreprocessThrottler.class); + + /** + * _maxPreprocessConcurrency and _maxConcurrentPreprocessesBeforeServingQueries must be >= 0. To effectively disable + * throttling, this can be set to a very high value + */ + private int _maxPreprocessConcurrency; + private int _maxPreprocessConcurrencyBeforeServingQueries; + private boolean _relaxThrottling; + private final AdjustableSemaphore _semaphore; + + /** + * @param maxPreprocessConcurrency configured preprocessing concurrency + * @param maxPreprocessConcurrencyBeforeServingQueries configured preprocessing concurrency before serving queries + * @param relaxThrottling whether to relax throttling prior to serving queries + */ + public SegmentPreprocessThrottler(int maxPreprocessConcurrency, int maxPreprocessConcurrencyBeforeServingQueries, + boolean relaxThrottling) { + LOGGER.info("Initializing SegmentPreprocessThrottler, maxPreprocessConcurrency: {}, " + + "maxPreprocessConcurrencyBeforeServingQueries: {}, relaxThrottling: {}", + maxPreprocessConcurrency, maxPreprocessConcurrencyBeforeServingQueries, relaxThrottling); + Preconditions.checkArgument(maxPreprocessConcurrency > 0, + "Max preprocess parallelism must be > 0, but found to be: " + maxPreprocessConcurrency); + Preconditions.checkArgument(maxPreprocessConcurrencyBeforeServingQueries > 0, + "Max preprocess parallelism before serving queries must be > 0, but found to be: " + + maxPreprocessConcurrencyBeforeServingQueries); + + _maxPreprocessConcurrency = maxPreprocessConcurrency; + _maxPreprocessConcurrencyBeforeServingQueries = maxPreprocessConcurrencyBeforeServingQueries; + _relaxThrottling = relaxThrottling; + + // maxConcurrentPreprocessesBeforeServingQueries is only used prior to serving queries and once the server is + // ready to serve queries this is not used again. Thus, it is safe to only pick up this configuration during + // server startup. There is no need to allow updates to this via the ZK CLUSTER config handler + int relaxThrottlingThreshold = Math.max(_maxPreprocessConcurrency, _maxPreprocessConcurrencyBeforeServingQueries); + int preprocessConcurrency = _maxPreprocessConcurrency; + if (relaxThrottling) { + preprocessConcurrency = relaxThrottlingThreshold; + LOGGER.info("Relax throttling enabled, setting preprocess concurrency to: {}", preprocessConcurrency); + } + _semaphore = new AdjustableSemaphore(preprocessConcurrency, true); + LOGGER.info("Created semaphore with total permits: {}, available permits: {}", totalPermits(), + availablePermits()); + } + + public synchronized void resetThrottling() { + LOGGER.info("Reset throttling threshold for segment preprocess concurrency, total permits: {}, available " + + "permits: {}", totalPermits(), availablePermits()); + _relaxThrottling = false; + _semaphore.setPermits(_maxPreprocessConcurrency); + LOGGER.info("Reset throttling completed, new concurrency: {}, total permits: {}, available permits: {}", + _maxPreprocessConcurrency, totalPermits(), availablePermits()); + } + + @Override + public synchronized void onChange(Set<String> changedConfigs, Map<String, String> clusterConfigs) { + if (clusterConfigs == null || clusterConfigs.isEmpty()) { + LOGGER.info("Skip updating SegmentPreprocessThrottler configs with empty clusterConfigs"); + return; + } + + if (changedConfigs == null || changedConfigs.isEmpty()) { + LOGGER.info("Skip updating SegmentPreprocessThrottler configs with unchanged clusterConfigs"); + return; + } + + LOGGER.info("Updating SegmentPreprocessThrottler configs with latest clusterConfigs"); + handleMaxPreprocessConcurrencyChange(changedConfigs, clusterConfigs); + handleMaxPreprocessConcurrencyBeforeServingQueriesChange(changedConfigs, clusterConfigs); + LOGGER.info("Updated SegmentPreprocessThrottler configs with latest clusterConfigs, total permits: {}", + totalPermits()); + } + + private void handleMaxPreprocessConcurrencyChange(Set<String> changedConfigs, Map<String, String> clusterConfigs) { + if (!changedConfigs.contains(CommonConstants.Helix.CONFIG_OF_MAX_SEGMENT_PREPROCESS_PARALLELISM)) { + LOGGER.info("changedConfigs list indicates maxPreprocessConcurrency was not updated, skipping updates"); + return; + } + + String configName = CommonConstants.Helix.CONFIG_OF_MAX_SEGMENT_PREPROCESS_PARALLELISM; + String defaultConfigValue = CommonConstants.Helix.DEFAULT_MAX_SEGMENT_PREPROCESS_PARALLELISM; + String maxParallelSegmentPreprocessesStr = clusterConfigs.getOrDefault(configName, defaultConfigValue); + int maxPreprocessConcurrency = Integer.parseInt(maxParallelSegmentPreprocessesStr); + + if (maxPreprocessConcurrency == _maxPreprocessConcurrency) { + LOGGER.info("No ZK update for maxPreprocessConcurrency {}, total permits: {}", _maxPreprocessConcurrency, + totalPermits()); + return; + } + + if (maxPreprocessConcurrency <= 0) { + LOGGER.warn("Invalid maxPreprocessConcurrency set: {}, not making change, fix config and try again", + maxPreprocessConcurrency); + return; + } + + LOGGER.info("Updated maxPreprocessConcurrency from: {} to: {}", _maxPreprocessConcurrency, Review Comment: done ########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/utils/SegmentPreprocessThrottler.java: ########## @@ -0,0 +1,212 @@ +/** + * 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.segment.local.utils; + +import com.google.common.annotations.VisibleForTesting; +import com.google.common.base.Preconditions; +import java.util.Map; +import java.util.Set; +import org.apache.pinot.common.concurrency.AdjustableSemaphore; +import org.apache.pinot.spi.config.provider.PinotClusterConfigChangeListener; +import org.apache.pinot.spi.utils.CommonConstants; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +/** + * Used to throttle the total concurrent index rebuilds that can happen on a given Pinot server. + * Code paths that do no need to rebuild the index or which don't happen on the server need not utilize this throttler. + */ +public class SegmentPreprocessThrottler implements PinotClusterConfigChangeListener { + private static final Logger LOGGER = LoggerFactory.getLogger(SegmentPreprocessThrottler.class); + + /** + * _maxPreprocessConcurrency and _maxConcurrentPreprocessesBeforeServingQueries must be >= 0. To effectively disable + * throttling, this can be set to a very high value + */ + private int _maxPreprocessConcurrency; + private int _maxPreprocessConcurrencyBeforeServingQueries; + private boolean _relaxThrottling; + private final AdjustableSemaphore _semaphore; + + /** + * @param maxPreprocessConcurrency configured preprocessing concurrency + * @param maxPreprocessConcurrencyBeforeServingQueries configured preprocessing concurrency before serving queries + * @param relaxThrottling whether to relax throttling prior to serving queries + */ + public SegmentPreprocessThrottler(int maxPreprocessConcurrency, int maxPreprocessConcurrencyBeforeServingQueries, + boolean relaxThrottling) { + LOGGER.info("Initializing SegmentPreprocessThrottler, maxPreprocessConcurrency: {}, " + + "maxPreprocessConcurrencyBeforeServingQueries: {}, relaxThrottling: {}", + maxPreprocessConcurrency, maxPreprocessConcurrencyBeforeServingQueries, relaxThrottling); + Preconditions.checkArgument(maxPreprocessConcurrency > 0, + "Max preprocess parallelism must be > 0, but found to be: " + maxPreprocessConcurrency); + Preconditions.checkArgument(maxPreprocessConcurrencyBeforeServingQueries > 0, + "Max preprocess parallelism before serving queries must be > 0, but found to be: " + + maxPreprocessConcurrencyBeforeServingQueries); + + _maxPreprocessConcurrency = maxPreprocessConcurrency; + _maxPreprocessConcurrencyBeforeServingQueries = maxPreprocessConcurrencyBeforeServingQueries; + _relaxThrottling = relaxThrottling; + + // maxConcurrentPreprocessesBeforeServingQueries is only used prior to serving queries and once the server is + // ready to serve queries this is not used again. Thus, it is safe to only pick up this configuration during + // server startup. There is no need to allow updates to this via the ZK CLUSTER config handler + int relaxThrottlingThreshold = Math.max(_maxPreprocessConcurrency, _maxPreprocessConcurrencyBeforeServingQueries); + int preprocessConcurrency = _maxPreprocessConcurrency; + if (relaxThrottling) { + preprocessConcurrency = relaxThrottlingThreshold; + LOGGER.info("Relax throttling enabled, setting preprocess concurrency to: {}", preprocessConcurrency); + } + _semaphore = new AdjustableSemaphore(preprocessConcurrency, true); + LOGGER.info("Created semaphore with total permits: {}, available permits: {}", totalPermits(), + availablePermits()); + } + + public synchronized void resetThrottling() { + LOGGER.info("Reset throttling threshold for segment preprocess concurrency, total permits: {}, available " + + "permits: {}", totalPermits(), availablePermits()); + _relaxThrottling = false; + _semaphore.setPermits(_maxPreprocessConcurrency); + LOGGER.info("Reset throttling completed, new concurrency: {}, total permits: {}, available permits: {}", + _maxPreprocessConcurrency, totalPermits(), availablePermits()); + } + + @Override + public synchronized void onChange(Set<String> changedConfigs, Map<String, String> clusterConfigs) { + if (clusterConfigs == null || clusterConfigs.isEmpty()) { + LOGGER.info("Skip updating SegmentPreprocessThrottler configs with empty clusterConfigs"); + return; + } + + if (changedConfigs == null || changedConfigs.isEmpty()) { + LOGGER.info("Skip updating SegmentPreprocessThrottler configs with unchanged clusterConfigs"); + return; + } + + LOGGER.info("Updating SegmentPreprocessThrottler configs with latest clusterConfigs"); + handleMaxPreprocessConcurrencyChange(changedConfigs, clusterConfigs); + handleMaxPreprocessConcurrencyBeforeServingQueriesChange(changedConfigs, clusterConfigs); + LOGGER.info("Updated SegmentPreprocessThrottler configs with latest clusterConfigs, total permits: {}", + totalPermits()); + } + + private void handleMaxPreprocessConcurrencyChange(Set<String> changedConfigs, Map<String, String> clusterConfigs) { + if (!changedConfigs.contains(CommonConstants.Helix.CONFIG_OF_MAX_SEGMENT_PREPROCESS_PARALLELISM)) { + LOGGER.info("changedConfigs list indicates maxPreprocessConcurrency was not updated, skipping updates"); + return; + } + + String configName = CommonConstants.Helix.CONFIG_OF_MAX_SEGMENT_PREPROCESS_PARALLELISM; + String defaultConfigValue = CommonConstants.Helix.DEFAULT_MAX_SEGMENT_PREPROCESS_PARALLELISM; + String maxParallelSegmentPreprocessesStr = clusterConfigs.getOrDefault(configName, defaultConfigValue); + int maxPreprocessConcurrency = Integer.parseInt(maxParallelSegmentPreprocessesStr); + + if (maxPreprocessConcurrency == _maxPreprocessConcurrency) { + LOGGER.info("No ZK update for maxPreprocessConcurrency {}, total permits: {}", _maxPreprocessConcurrency, + totalPermits()); + return; + } + + if (maxPreprocessConcurrency <= 0) { + LOGGER.warn("Invalid maxPreprocessConcurrency set: {}, not making change, fix config and try again", + maxPreprocessConcurrency); + return; + } + + LOGGER.info("Updated maxPreprocessConcurrency from: {} to: {}", _maxPreprocessConcurrency, + maxPreprocessConcurrency); + _maxPreprocessConcurrency = maxPreprocessConcurrency; + + if (_relaxThrottling) { + LOGGER.warn("Reset throttling hasn't been called yet, not updating the permits with maxPreprocessConcurrency"); Review Comment: done ########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/utils/SegmentPreprocessThrottler.java: ########## @@ -0,0 +1,212 @@ +/** + * 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.segment.local.utils; + +import com.google.common.annotations.VisibleForTesting; +import com.google.common.base.Preconditions; +import java.util.Map; +import java.util.Set; +import org.apache.pinot.common.concurrency.AdjustableSemaphore; +import org.apache.pinot.spi.config.provider.PinotClusterConfigChangeListener; +import org.apache.pinot.spi.utils.CommonConstants; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +/** + * Used to throttle the total concurrent index rebuilds that can happen on a given Pinot server. + * Code paths that do no need to rebuild the index or which don't happen on the server need not utilize this throttler. + */ +public class SegmentPreprocessThrottler implements PinotClusterConfigChangeListener { + private static final Logger LOGGER = LoggerFactory.getLogger(SegmentPreprocessThrottler.class); + + /** + * _maxPreprocessConcurrency and _maxConcurrentPreprocessesBeforeServingQueries must be >= 0. To effectively disable + * throttling, this can be set to a very high value + */ + private int _maxPreprocessConcurrency; + private int _maxPreprocessConcurrencyBeforeServingQueries; + private boolean _relaxThrottling; + private final AdjustableSemaphore _semaphore; + + /** + * @param maxPreprocessConcurrency configured preprocessing concurrency + * @param maxPreprocessConcurrencyBeforeServingQueries configured preprocessing concurrency before serving queries + * @param relaxThrottling whether to relax throttling prior to serving queries + */ + public SegmentPreprocessThrottler(int maxPreprocessConcurrency, int maxPreprocessConcurrencyBeforeServingQueries, + boolean relaxThrottling) { + LOGGER.info("Initializing SegmentPreprocessThrottler, maxPreprocessConcurrency: {}, " + + "maxPreprocessConcurrencyBeforeServingQueries: {}, relaxThrottling: {}", + maxPreprocessConcurrency, maxPreprocessConcurrencyBeforeServingQueries, relaxThrottling); + Preconditions.checkArgument(maxPreprocessConcurrency > 0, + "Max preprocess parallelism must be > 0, but found to be: " + maxPreprocessConcurrency); + Preconditions.checkArgument(maxPreprocessConcurrencyBeforeServingQueries > 0, + "Max preprocess parallelism before serving queries must be > 0, but found to be: " + + maxPreprocessConcurrencyBeforeServingQueries); + + _maxPreprocessConcurrency = maxPreprocessConcurrency; + _maxPreprocessConcurrencyBeforeServingQueries = maxPreprocessConcurrencyBeforeServingQueries; + _relaxThrottling = relaxThrottling; + + // maxConcurrentPreprocessesBeforeServingQueries is only used prior to serving queries and once the server is + // ready to serve queries this is not used again. Thus, it is safe to only pick up this configuration during + // server startup. There is no need to allow updates to this via the ZK CLUSTER config handler + int relaxThrottlingThreshold = Math.max(_maxPreprocessConcurrency, _maxPreprocessConcurrencyBeforeServingQueries); + int preprocessConcurrency = _maxPreprocessConcurrency; + if (relaxThrottling) { + preprocessConcurrency = relaxThrottlingThreshold; + LOGGER.info("Relax throttling enabled, setting preprocess concurrency to: {}", preprocessConcurrency); + } + _semaphore = new AdjustableSemaphore(preprocessConcurrency, true); + LOGGER.info("Created semaphore with total permits: {}, available permits: {}", totalPermits(), + availablePermits()); + } + + public synchronized void resetThrottling() { + LOGGER.info("Reset throttling threshold for segment preprocess concurrency, total permits: {}, available " + + "permits: {}", totalPermits(), availablePermits()); + _relaxThrottling = false; + _semaphore.setPermits(_maxPreprocessConcurrency); + LOGGER.info("Reset throttling completed, new concurrency: {}, total permits: {}, available permits: {}", + _maxPreprocessConcurrency, totalPermits(), availablePermits()); + } + + @Override + public synchronized void onChange(Set<String> changedConfigs, Map<String, String> clusterConfigs) { + if (clusterConfigs == null || clusterConfigs.isEmpty()) { + LOGGER.info("Skip updating SegmentPreprocessThrottler configs with empty clusterConfigs"); + return; + } + + if (changedConfigs == null || changedConfigs.isEmpty()) { + LOGGER.info("Skip updating SegmentPreprocessThrottler configs with unchanged clusterConfigs"); + return; + } + + LOGGER.info("Updating SegmentPreprocessThrottler configs with latest clusterConfigs"); + handleMaxPreprocessConcurrencyChange(changedConfigs, clusterConfigs); + handleMaxPreprocessConcurrencyBeforeServingQueriesChange(changedConfigs, clusterConfigs); + LOGGER.info("Updated SegmentPreprocessThrottler configs with latest clusterConfigs, total permits: {}", + totalPermits()); + } + + private void handleMaxPreprocessConcurrencyChange(Set<String> changedConfigs, Map<String, String> clusterConfigs) { + if (!changedConfigs.contains(CommonConstants.Helix.CONFIG_OF_MAX_SEGMENT_PREPROCESS_PARALLELISM)) { + LOGGER.info("changedConfigs list indicates maxPreprocessConcurrency was not updated, skipping updates"); + return; + } + + String configName = CommonConstants.Helix.CONFIG_OF_MAX_SEGMENT_PREPROCESS_PARALLELISM; + String defaultConfigValue = CommonConstants.Helix.DEFAULT_MAX_SEGMENT_PREPROCESS_PARALLELISM; + String maxParallelSegmentPreprocessesStr = clusterConfigs.getOrDefault(configName, defaultConfigValue); + int maxPreprocessConcurrency = Integer.parseInt(maxParallelSegmentPreprocessesStr); + + if (maxPreprocessConcurrency == _maxPreprocessConcurrency) { + LOGGER.info("No ZK update for maxPreprocessConcurrency {}, total permits: {}", _maxPreprocessConcurrency, + totalPermits()); + return; + } + + if (maxPreprocessConcurrency <= 0) { + LOGGER.warn("Invalid maxPreprocessConcurrency set: {}, not making change, fix config and try again", + maxPreprocessConcurrency); + return; + } + + LOGGER.info("Updated maxPreprocessConcurrency from: {} to: {}", _maxPreprocessConcurrency, + maxPreprocessConcurrency); + _maxPreprocessConcurrency = maxPreprocessConcurrency; + + if (_relaxThrottling) { + LOGGER.warn("Reset throttling hasn't been called yet, not updating the permits with maxPreprocessConcurrency"); + return; + } + _semaphore.setPermits(_maxPreprocessConcurrency); + } + + private void handleMaxPreprocessConcurrencyBeforeServingQueriesChange(Set<String> changedConfigs, + Map<String, String> clusterConfigs) { + if (!changedConfigs.contains( + CommonConstants.Helix.CONFIG_OF_MAX_SEGMENT_PREPROCESS_PARALLELISM_BEFORE_SERVING_QUERIES)) { + LOGGER.info("changedConfigs list indicates maxPreprocessConcurrencyBeforeServingQueries was not updated, " + + "skipping updates"); + return; + } + + String configName = CommonConstants.Helix.CONFIG_OF_MAX_SEGMENT_PREPROCESS_PARALLELISM_BEFORE_SERVING_QUERIES; + String defaultConfigValue = CommonConstants.Helix.DEFAULT_MAX_SEGMENT_PREPROCESS_PARALLELISM_BEFORE_SERVING_QUERIES; + String maxParallelSegmentPreprocessesBeforeServingQueriesStr = + clusterConfigs.getOrDefault(configName, defaultConfigValue); + int maxPreprocessConcurrencyBeforeServingQueries = + Integer.parseInt(maxParallelSegmentPreprocessesBeforeServingQueriesStr); + + if (maxPreprocessConcurrencyBeforeServingQueries == _maxPreprocessConcurrencyBeforeServingQueries) { + LOGGER.info("No ZK update for maxPreprocessConcurrencyBeforeServingQueries {}, total permits: {}", + _maxPreprocessConcurrencyBeforeServingQueries, totalPermits()); + return; + } + + if (maxPreprocessConcurrencyBeforeServingQueries <= 0) { + LOGGER.warn("Invalid maxPreprocessConcurrencyBeforeServingQueries set: {}, not making change, fix config " + + "and try again", maxPreprocessConcurrencyBeforeServingQueries); + return; + } + + LOGGER.info("Updated maxPreprocessConcurrencyBeforeServingQueries from: {} to: {}", + _maxPreprocessConcurrencyBeforeServingQueries, maxPreprocessConcurrencyBeforeServingQueries); + _maxPreprocessConcurrencyBeforeServingQueries = maxPreprocessConcurrencyBeforeServingQueries; + if (_relaxThrottling) { + LOGGER.warn("maxPreprocessConcurrencyBeforeServingQueries was updated before reset throttling was called, " Review Comment: done -- This is an automated message from the Apache Git Service. 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