vinothchandar commented on a change in pull request #2359: URL: https://github.com/apache/hudi/pull/2359#discussion_r579589397
########## File path: hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/heartbeat/HeartbeatUtils.java ########## @@ -0,0 +1,102 @@ +/* + * 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.hudi.client.heartbeat; + +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.hudi.common.table.HoodieTableMetaClient; +import org.apache.hudi.common.table.timeline.HoodieInstant; +import org.apache.hudi.common.util.ValidationUtils; +import org.apache.hudi.config.HoodieWriteConfig; +import org.apache.hudi.exception.HoodieException; +import org.apache.hudi.table.HoodieTable; +import org.apache.log4j.LogManager; +import org.apache.log4j.Logger; + +import java.io.File; +import java.io.IOException; +import java.util.List; +import java.util.Set; +import java.util.stream.Collectors; + +/** + * Helper class to delete heartbeat for completed or failed instants with expired heartbeats. + */ +public class HeartbeatUtils { + + private static final Logger LOG = LogManager.getLogger(HeartbeatUtils.class); + + /** + * Deletes the heartbeat file for the specified instant. + * @param fs + * @param basePath + * @param instantTime + * @return + */ + public static boolean deleteHeartbeatFile(FileSystem fs, String basePath, String instantTime) { + boolean deleted = false; + try { + String heartbeatFolderPath = HoodieTableMetaClient.getHeartbeatFolderPath(basePath); + deleted = fs.delete(new Path(heartbeatFolderPath + File.separator + instantTime), false); + if (!deleted) { + LOG.error("Failed to delete heartbeat for instant " + instantTime); + } + } catch (IOException io) { + LOG.error("Unable to delete heartbeat for instant " + instantTime, io); + } + return deleted; + } + + /** + * Deletes the heartbeat files for instants with expired heartbeats without any active instant. + * @param allExistingHeartbeatInstants + * @param metaClient + * @param basePath + */ + public static void cleanExpiredHeartbeats(List<String> allExistingHeartbeatInstants, + HoodieTableMetaClient metaClient, String basePath) { + Set<String> nonExpiredHeartbeatInstants = metaClient.getActiveTimeline() + .filterCompletedInstants().getInstants().map(HoodieInstant::getTimestamp).collect(Collectors.toSet()); + allExistingHeartbeatInstants.stream().forEach(instant -> { + if (!nonExpiredHeartbeatInstants.contains(instant)) { + deleteHeartbeatFile(metaClient.getFs(), basePath, instant); + } + }); + } + + /** + * Check if the heartbeat corresponding to instantTime has expired. If yes, abort by throwing an exception. + * @param instantTime + * @param table + * @param heartbeatClient + * @param config + */ + public static void abortIfHeartbeatExpired(String instantTime, HoodieTable table, + HoodieHeartbeatClient heartbeatClient, HoodieWriteConfig config) { + ValidationUtils.checkArgument(heartbeatClient != null); + try { + if (config.getFailedWritesCleanPolicy().isLazy() && heartbeatClient.isHeartbeatExpired(instantTime)) { + throw new HoodieException("Heartbeat for instant " + instantTime + " has expired, last heartbeat " Review comment: this deserves its own Exception class. ########## File path: hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/heartbeat/HeartbeatUtils.java ########## @@ -0,0 +1,102 @@ +/* + * 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.hudi.client.heartbeat; + +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.hudi.common.table.HoodieTableMetaClient; +import org.apache.hudi.common.table.timeline.HoodieInstant; +import org.apache.hudi.common.util.ValidationUtils; +import org.apache.hudi.config.HoodieWriteConfig; +import org.apache.hudi.exception.HoodieException; +import org.apache.hudi.table.HoodieTable; +import org.apache.log4j.LogManager; +import org.apache.log4j.Logger; + +import java.io.File; +import java.io.IOException; +import java.util.List; +import java.util.Set; +import java.util.stream.Collectors; + +/** + * Helper class to delete heartbeat for completed or failed instants with expired heartbeats. + */ +public class HeartbeatUtils { Review comment: to our discussion today, can you add a `TestHeartbeatUtils` in a subsequent PR? ########## File path: hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/heartbeat/HoodieHeartbeatClient.java ########## @@ -0,0 +1,289 @@ +/* + * 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.hudi.client.heartbeat; + +import org.apache.hadoop.fs.FileStatus; +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.hudi.common.table.HoodieTableMetaClient; +import org.apache.hudi.common.util.ValidationUtils; +import org.apache.hudi.exception.HoodieException; +import org.apache.hudi.exception.HoodieHeartbeatException; +import org.apache.log4j.LogManager; +import org.apache.log4j.Logger; + +import javax.annotation.concurrent.NotThreadSafe; +import java.io.File; +import java.io.IOException; +import java.io.OutputStream; +import java.io.Serializable; +import java.util.Arrays; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; +import java.util.Timer; +import java.util.TimerTask; + +/** + * This class creates heartbeat for hudi client. This heartbeat is used to ascertain whether the running job is or not. + * NOTE: Due to CPU contention on the driver/client node, the heartbeats could be delayed, hence it's important to set + * the value high enough to avoid that possibility. + */ +@NotThreadSafe +public class HoodieHeartbeatClient implements AutoCloseable, Serializable { + + private static final Logger LOG = LogManager.getLogger(HoodieHeartbeatClient.class); + + private final transient FileSystem fs; + private final String basePath; + // path to the heartbeat folder where all writers are updating their heartbeats + private String heartbeatFolderPath; + // heartbeat interval in millis + private final Long heartbeatIntervalInMs; + private Integer numTolerableHeartbeatMisses; + private final Long maxAllowableHeartbeatIntervalInMs; + private Map<String, Heartbeat> instantToHeartbeatMap; + + public HoodieHeartbeatClient(FileSystem fs, String basePath, Long heartbeatIntervalInMs, + Integer numTolerableHeartbeatMisses) { + ValidationUtils.checkArgument(heartbeatIntervalInMs >= 1000, "Cannot set heartbeat lower than 1 second"); + this.fs = fs; + this.basePath = basePath; + this.heartbeatFolderPath = HoodieTableMetaClient.getHeartbeatFolderPath(basePath); + this.heartbeatIntervalInMs = heartbeatIntervalInMs; + this.numTolerableHeartbeatMisses = numTolerableHeartbeatMisses; + this.maxAllowableHeartbeatIntervalInMs = this.heartbeatIntervalInMs * this.numTolerableHeartbeatMisses; + this.instantToHeartbeatMap = new HashMap<>(); + } + + class Heartbeat { + + private String instantTime; + private Boolean isHeartbeatStarted = false; + private Boolean isHeartbeatStopped = false; + private Long lastHeartbeatTime; + private Integer numHeartbeats = 0; + private Timer timer = new Timer(); + + public String getInstantTime() { + return instantTime; + } + + public void setInstantTime(String instantTime) { + this.instantTime = instantTime; + } + + public Boolean isHeartbeatStarted() { + return isHeartbeatStarted; + } + + public void setHeartbeatStarted(Boolean heartbeatStarted) { + isHeartbeatStarted = heartbeatStarted; + } + + public Boolean isHeartbeatStopped() { + return isHeartbeatStopped; + } + + public void setHeartbeatStopped(Boolean heartbeatStopped) { + isHeartbeatStopped = heartbeatStopped; + } + + public Long getLastHeartbeatTime() { + return lastHeartbeatTime; + } + + public void setLastHeartbeatTime(Long lastHeartbeatTime) { + this.lastHeartbeatTime = lastHeartbeatTime; + } + + public Integer getNumHeartbeats() { + return numHeartbeats; + } + + public void setNumHeartbeats(Integer numHeartbeats) { + this.numHeartbeats = numHeartbeats; + } + + public Timer getTimer() { + return timer; + } + + public void setTimer(Timer timer) { + this.timer = timer; + } + + @Override + public String toString() { + return "Heartbeat{" + + "instantTime='" + instantTime + '\'' + + ", isHeartbeatStarted=" + isHeartbeatStarted + + ", isHeartbeatStopped=" + isHeartbeatStopped + + ", lastHeartbeatTime=" + lastHeartbeatTime + + ", numHeartbeats=" + numHeartbeats + + ", timer=" + timer + + '}'; + } + } + + class HeartbeatTask extends TimerTask { + + private final String instantTime; + + HeartbeatTask(String instantTime) { + this.instantTime = instantTime; + } + + @Override + public void run() { + updateHeartbeat(instantTime); + } + } + + /** + * Start a new heartbeat for the specified instant. If there is already one running, this will be a NO_OP + * @param instantTime + */ + public void start(String instantTime) { + LOG.info("Received request to start heartbeat for instant time " + instantTime); + Heartbeat heartbeat = instantToHeartbeatMap.get(instantTime); + ValidationUtils.checkArgument(heartbeat == null || !heartbeat.isHeartbeatStopped(), "Cannot restart a stopped heartbeat for " + instantTime); + if (heartbeat != null && heartbeat.isHeartbeatStarted()) { Review comment: invert the condition? and avoid the `return ;` ########## File path: hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/AbstractHoodieWriteClient.java ########## @@ -181,7 +171,7 @@ public boolean commitStats(String instantTime, List<HoodieWriteStat> stats, Opti HoodieCommitMetadata metadata = CommitUtils.buildMetadata(stats, partitionToReplaceFileIds, extraMetadata, operationType, config.getSchema(), commitActionType); // Finalize write finalizeWrite(table, instantTime, stats); - + HeartbeatUtils.abortIfHeartbeatExpired(instantTime, table, heartbeatClient, config); Review comment: as long as the exception is clear, throwing runtime exceptions is actually better. (source: clean code book) ########## File path: hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/heartbeat/HoodieHeartbeatClient.java ########## @@ -0,0 +1,289 @@ +/* + * 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.hudi.client.heartbeat; + +import org.apache.hadoop.fs.FileStatus; +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.hudi.common.table.HoodieTableMetaClient; +import org.apache.hudi.common.util.ValidationUtils; +import org.apache.hudi.exception.HoodieException; +import org.apache.hudi.exception.HoodieHeartbeatException; +import org.apache.log4j.LogManager; +import org.apache.log4j.Logger; + +import javax.annotation.concurrent.NotThreadSafe; +import java.io.File; +import java.io.IOException; +import java.io.OutputStream; +import java.io.Serializable; +import java.util.Arrays; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; +import java.util.Timer; +import java.util.TimerTask; + +/** + * This class creates heartbeat for hudi client. This heartbeat is used to ascertain whether the running job is or not. + * NOTE: Due to CPU contention on the driver/client node, the heartbeats could be delayed, hence it's important to set + * the value high enough to avoid that possibility. + */ +@NotThreadSafe +public class HoodieHeartbeatClient implements AutoCloseable, Serializable { + + private static final Logger LOG = LogManager.getLogger(HoodieHeartbeatClient.class); + + private final transient FileSystem fs; + private final String basePath; + // path to the heartbeat folder where all writers are updating their heartbeats + private String heartbeatFolderPath; + // heartbeat interval in millis + private final Long heartbeatIntervalInMs; + private Integer numTolerableHeartbeatMisses; + private final Long maxAllowableHeartbeatIntervalInMs; + private Map<String, Heartbeat> instantToHeartbeatMap; + + public HoodieHeartbeatClient(FileSystem fs, String basePath, Long heartbeatIntervalInMs, + Integer numTolerableHeartbeatMisses) { + ValidationUtils.checkArgument(heartbeatIntervalInMs >= 1000, "Cannot set heartbeat lower than 1 second"); + this.fs = fs; + this.basePath = basePath; + this.heartbeatFolderPath = HoodieTableMetaClient.getHeartbeatFolderPath(basePath); + this.heartbeatIntervalInMs = heartbeatIntervalInMs; + this.numTolerableHeartbeatMisses = numTolerableHeartbeatMisses; + this.maxAllowableHeartbeatIntervalInMs = this.heartbeatIntervalInMs * this.numTolerableHeartbeatMisses; + this.instantToHeartbeatMap = new HashMap<>(); + } + + class Heartbeat { + + private String instantTime; + private Boolean isHeartbeatStarted = false; + private Boolean isHeartbeatStopped = false; + private Long lastHeartbeatTime; + private Integer numHeartbeats = 0; + private Timer timer = new Timer(); + + public String getInstantTime() { + return instantTime; + } + + public void setInstantTime(String instantTime) { + this.instantTime = instantTime; + } + + public Boolean isHeartbeatStarted() { + return isHeartbeatStarted; + } + + public void setHeartbeatStarted(Boolean heartbeatStarted) { + isHeartbeatStarted = heartbeatStarted; + } + + public Boolean isHeartbeatStopped() { + return isHeartbeatStopped; + } + + public void setHeartbeatStopped(Boolean heartbeatStopped) { + isHeartbeatStopped = heartbeatStopped; + } + + public Long getLastHeartbeatTime() { + return lastHeartbeatTime; + } + + public void setLastHeartbeatTime(Long lastHeartbeatTime) { + this.lastHeartbeatTime = lastHeartbeatTime; + } + + public Integer getNumHeartbeats() { + return numHeartbeats; + } + + public void setNumHeartbeats(Integer numHeartbeats) { + this.numHeartbeats = numHeartbeats; + } + + public Timer getTimer() { + return timer; + } + + public void setTimer(Timer timer) { + this.timer = timer; + } + + @Override + public String toString() { + return "Heartbeat{" + + "instantTime='" + instantTime + '\'' + + ", isHeartbeatStarted=" + isHeartbeatStarted + + ", isHeartbeatStopped=" + isHeartbeatStopped + + ", lastHeartbeatTime=" + lastHeartbeatTime + + ", numHeartbeats=" + numHeartbeats + + ", timer=" + timer + + '}'; + } + } + + class HeartbeatTask extends TimerTask { + + private final String instantTime; + + HeartbeatTask(String instantTime) { + this.instantTime = instantTime; + } + + @Override + public void run() { + updateHeartbeat(instantTime); + } + } + + /** + * Start a new heartbeat for the specified instant. If there is already one running, this will be a NO_OP + * @param instantTime + */ + public void start(String instantTime) { + LOG.info("Received request to start heartbeat for instant time " + instantTime); + Heartbeat heartbeat = instantToHeartbeatMap.get(instantTime); + ValidationUtils.checkArgument(heartbeat == null || !heartbeat.isHeartbeatStopped(), "Cannot restart a stopped heartbeat for " + instantTime); + if (heartbeat != null && heartbeat.isHeartbeatStarted()) { + // heartbeat already started, NO_OP + return; + } else { + Heartbeat newHeartbeat = new Heartbeat(); + newHeartbeat.setHeartbeatStarted(true); Review comment: shuld the `Heartbeat()` constructor do this? ########## File path: hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/heartbeat/HeartbeatUtils.java ########## @@ -0,0 +1,102 @@ +/* + * 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.hudi.client.heartbeat; + +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.hudi.common.table.HoodieTableMetaClient; +import org.apache.hudi.common.table.timeline.HoodieInstant; +import org.apache.hudi.common.util.ValidationUtils; +import org.apache.hudi.config.HoodieWriteConfig; +import org.apache.hudi.exception.HoodieException; +import org.apache.hudi.table.HoodieTable; +import org.apache.log4j.LogManager; +import org.apache.log4j.Logger; + +import java.io.File; +import java.io.IOException; +import java.util.List; +import java.util.Set; +import java.util.stream.Collectors; + +/** + * Helper class to delete heartbeat for completed or failed instants with expired heartbeats. + */ +public class HeartbeatUtils { + + private static final Logger LOG = LogManager.getLogger(HeartbeatUtils.class); + + /** + * Deletes the heartbeat file for the specified instant. + * @param fs + * @param basePath + * @param instantTime + * @return + */ + public static boolean deleteHeartbeatFile(FileSystem fs, String basePath, String instantTime) { + boolean deleted = false; + try { + String heartbeatFolderPath = HoodieTableMetaClient.getHeartbeatFolderPath(basePath); + deleted = fs.delete(new Path(heartbeatFolderPath + File.separator + instantTime), false); + if (!deleted) { + LOG.error("Failed to delete heartbeat for instant " + instantTime); + } + } catch (IOException io) { + LOG.error("Unable to delete heartbeat for instant " + instantTime, io); + } + return deleted; + } + + /** + * Deletes the heartbeat files for instants with expired heartbeats without any active instant. + * @param allExistingHeartbeatInstants + * @param metaClient + * @param basePath + */ + public static void cleanExpiredHeartbeats(List<String> allExistingHeartbeatInstants, + HoodieTableMetaClient metaClient, String basePath) { + Set<String> nonExpiredHeartbeatInstants = metaClient.getActiveTimeline() + .filterCompletedInstants().getInstants().map(HoodieInstant::getTimestamp).collect(Collectors.toSet()); + allExistingHeartbeatInstants.stream().forEach(instant -> { + if (!nonExpiredHeartbeatInstants.contains(instant)) { + deleteHeartbeatFile(metaClient.getFs(), basePath, instant); + } + }); + } + + /** + * Check if the heartbeat corresponding to instantTime has expired. If yes, abort by throwing an exception. + * @param instantTime + * @param table + * @param heartbeatClient + * @param config + */ + public static void abortIfHeartbeatExpired(String instantTime, HoodieTable table, + HoodieHeartbeatClient heartbeatClient, HoodieWriteConfig config) { + ValidationUtils.checkArgument(heartbeatClient != null); + try { + if (config.getFailedWritesCleanPolicy().isLazy() && heartbeatClient.isHeartbeatExpired(instantTime)) { + throw new HoodieException("Heartbeat for instant " + instantTime + " has expired, last heartbeat " + + heartbeatClient.getLastHeartbeatTime(table.getMetaClient().getFs(), config.getBasePath(), instantTime)); + } + } catch (IOException io) { + throw new HoodieException("Unable to read heartbeat", io); Review comment: Pleas throw `HoodieIOException` whenever there is an IOException being rethrown ########## File path: hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/AbstractHoodieWriteClient.java ########## @@ -749,22 +739,49 @@ private HoodieTimeline getInflightTimelineExcludeCompactionAndClustering(HoodieT } /** - * Cleanup all pending commits. + * Rollback all failed writes. */ - private void rollbackPendingCommits() { + public Boolean rollbackFailedWrites() { Review comment: to @nsivabalan 's point. can't the return type be void and use `Void` for the function. ########## File path: hudi-common/src/main/java/org/apache/hudi/common/table/HoodieTableMetaClient.java ########## @@ -71,10 +72,10 @@ private static final long serialVersionUID = 1L; private static final Logger LOG = LogManager.getLogger(HoodieTableMetaClient.class); public static final String METAFOLDER_NAME = ".hoodie"; - public static final String TEMPFOLDER_NAME = METAFOLDER_NAME + Path.SEPARATOR + ".temp"; - public static final String AUXILIARYFOLDER_NAME = METAFOLDER_NAME + Path.SEPARATOR + ".aux"; - public static final String BOOTSTRAP_INDEX_ROOT_FOLDER_PATH = AUXILIARYFOLDER_NAME + Path.SEPARATOR + ".bootstrap"; - + public static final String TEMPFOLDER_NAME = METAFOLDER_NAME + File.separator + ".temp"; Review comment: why this change? ########## File path: hudi-common/src/main/java/org/apache/hudi/common/table/log/AbstractHoodieLogRecordScanner.java ########## @@ -145,6 +148,14 @@ public void scan() { // hit a block with instant time greater than should be processed, stop processing further break; } + if (r.getBlockType() != CORRUPT_BLOCK && r.getBlockType() != COMMAND_BLOCK) { Review comment: test case for this? ########## File path: hudi-client/hudi-spark-client/src/test/java/org/apache/hudi/io/TestHoodieTimelineArchiveLog.java ########## @@ -408,11 +408,11 @@ public void testArchiveCommitCompactionNoHole() throws IOException { HoodieTable table = HoodieSparkTable.create(cfg, context, metaClient); HoodieTimelineArchiveLog archiveLog = new HoodieTimelineArchiveLog(cfg, table); - HoodieTimeline timeline = metaClient.getActiveTimeline().getCommitsAndCompactionTimeline(); + HoodieTimeline timeline = metaClient.getActiveTimeline().getWriteTimeline(); Review comment: can we add a test case for archiving with inflight instants and lazy cleaning? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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