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Posted to issues@ozone.apache.org by GitBox <gi...@apache.org> on 2022/06/15 09:39:00 UTC
[GitHub] [ozone] adoroszlai commented on a diff in pull request #3504: HDDS-6806. EC: Implement the EC Reconstruction coordinator.
adoroszlai commented on code in PR #3504:
URL: https://github.com/apache/ozone/pull/3504#discussion_r897696957
##########
hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/XceiverClientManager.java:
##########
@@ -347,6 +349,37 @@ public void setMaxSize(int maxSize) {
this.maxSize = maxSize;
}
+ public void setStaleThreshold(long threshold) {
+ this.staleThreshold = threshold;
+ }
+
+ }
+
+ /**
+ * Builder of XceiverClientManagerConfig.
Review Comment:
Nit: isn't it `ScmClientConfig`?
##########
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/ec/reconstruction/ECReconstructionCoordinator.java:
##########
@@ -0,0 +1,417 @@
+/*
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.hadoop.ozone.container.ec.reconstruction;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import org.apache.hadoop.hdds.client.BlockID;
+import org.apache.hadoop.hdds.client.ECReplicationConfig;
+import org.apache.hadoop.hdds.conf.ConfigurationSource;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
+import org.apache.hadoop.hdds.scm.ByteStringConversion;
+import org.apache.hadoop.hdds.scm.OzoneClientConfig;
+import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
+import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
+import org.apache.hadoop.hdds.scm.storage.BlockLocationInfo;
+import org.apache.hadoop.hdds.scm.storage.BufferPool;
+import org.apache.hadoop.hdds.scm.storage.ECBlockOutputStream;
+import org.apache.hadoop.hdds.security.x509.certificate.client.CertificateClient;
+import org.apache.hadoop.io.ByteBufferPool;
+import org.apache.hadoop.io.ElasticByteBufferPool;
+import org.apache.hadoop.ozone.OzoneConsts;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactory;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactoryImpl;
+import org.apache.hadoop.ozone.client.io.ECBlockInputStreamProxy;
+import org.apache.hadoop.ozone.client.io.ECBlockReconstructedStripeInputStream;
+import org.apache.hadoop.ozone.container.common.helpers.BlockData;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+/**
+ * The Coordinator implements the main flow of reconstructing
+ * missing container replicas.
+ * <p>
+ * For a container reconstruction task, the main flow is:
+ * - ListBlock from all healthy replicas
+ * - calculate effective block group len for all blocks
+ * - for each block
+ * - build a ReconstructInputStream to read healthy chunks
+ * - build a ECBlockOutputStream to write out decoded chunks
+ * - for each stripe
+ * - use ReconstructInputStream.readStripe to decode missing chunks
+ * - use ECBlockOutputStream.write to write decoded chunks to TargetDNs
+ * - PutBlock
+ * - CloseContainer
Review Comment:
Nit: seems like some indentation is missing (e.g. to clarify which steps are part of the for loops).
##########
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/ec/reconstruction/ECReconstructionCoordinator.java:
##########
@@ -0,0 +1,417 @@
+/*
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.hadoop.ozone.container.ec.reconstruction;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import org.apache.hadoop.hdds.client.BlockID;
+import org.apache.hadoop.hdds.client.ECReplicationConfig;
+import org.apache.hadoop.hdds.conf.ConfigurationSource;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
+import org.apache.hadoop.hdds.scm.ByteStringConversion;
+import org.apache.hadoop.hdds.scm.OzoneClientConfig;
+import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
+import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
+import org.apache.hadoop.hdds.scm.storage.BlockLocationInfo;
+import org.apache.hadoop.hdds.scm.storage.BufferPool;
+import org.apache.hadoop.hdds.scm.storage.ECBlockOutputStream;
+import org.apache.hadoop.hdds.security.x509.certificate.client.CertificateClient;
+import org.apache.hadoop.io.ByteBufferPool;
+import org.apache.hadoop.io.ElasticByteBufferPool;
+import org.apache.hadoop.ozone.OzoneConsts;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactory;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactoryImpl;
+import org.apache.hadoop.ozone.client.io.ECBlockInputStreamProxy;
+import org.apache.hadoop.ozone.client.io.ECBlockReconstructedStripeInputStream;
+import org.apache.hadoop.ozone.container.common.helpers.BlockData;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+/**
+ * The Coordinator implements the main flow of reconstructing
+ * missing container replicas.
+ * <p>
+ * For a container reconstruction task, the main flow is:
+ * - ListBlock from all healthy replicas
+ * - calculate effective block group len for all blocks
+ * - for each block
+ * - build a ReconstructInputStream to read healthy chunks
+ * - build a ECBlockOutputStream to write out decoded chunks
+ * - for each stripe
+ * - use ReconstructInputStream.readStripe to decode missing chunks
+ * - use ECBlockOutputStream.write to write decoded chunks to TargetDNs
+ * - PutBlock
+ * - CloseContainer
+ */
+public class ECReconstructionCoordinator implements Closeable {
+
+ static final Logger LOG =
+ LoggerFactory.getLogger(ECReconstructionCoordinator.class);
+
+ private static final int EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE = 3;
+
+ private final ECContainerOperationClient containerOperationClient;
+
+ private final ConfigurationSource config;
+
+ private final ByteBufferPool byteBufferPool;
+
+ private ExecutorService ecReconstructExecutor;
+
+ private BlockInputStreamFactory blockInputStreamFactory;
+
+ public ECReconstructionCoordinator(ECContainerOperationClient containerClient,
+ ConfigurationSource conf, ByteBufferPool byteBufferPool,
+ ExecutorService reconstructExecutor,
+ BlockInputStreamFactory streamFactory) {
+ this.containerOperationClient = containerClient;
+ this.config = conf;
+ this.byteBufferPool = byteBufferPool;
+ this.blockInputStreamFactory = streamFactory;
+ this.ecReconstructExecutor = reconstructExecutor;
+ }
+
+ public ECReconstructionCoordinator(ConfigurationSource conf,
+ CertificateClient certificateClient) throws IOException {
+ this(new ECContainerOperationClient(conf, certificateClient), conf,
+ new ElasticByteBufferPool(), null, null);
+ this.ecReconstructExecutor =
+ new ThreadPoolExecutor(EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE,
+ config.getObject(OzoneClientConfig.class)
+ .getEcReconstructStripeReadPoolLimit(), 60, TimeUnit.SECONDS,
+ new SynchronousQueue<>(), new ThreadFactoryBuilder()
+ .setNameFormat("ec-reconstruct-reader-TID-%d").build(),
+ new ThreadPoolExecutor.CallerRunsPolicy());
+ this.blockInputStreamFactory = BlockInputStreamFactoryImpl
+ .getInstance(byteBufferPool, () -> ecReconstructExecutor);
+ }
+
+ public void reconstructECContainerGroup(long containerID,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> sourceNodeMap,
+ SortedMap<Integer, DatanodeDetails> targetNodeMap) throws IOException {
+
+ Pipeline pipeline = rebuildInputPipeline(repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockData[]> blockDataMap =
+ getBlockDataMap(containerID, repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockLocationInfo> blockLocationInfoMap =
+ calcBlockLocationInfoMap(containerID, blockDataMap, pipeline);
+
+ // 1. create target recovering containers.
+ Set<Map.Entry<Integer, DatanodeDetails>> targetIndexDns =
+ targetNodeMap.entrySet();
+ Iterator<Map.Entry<Integer, DatanodeDetails>> iterator =
+ targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ Map.Entry<Integer, DatanodeDetails> indexDnPair = iterator.next();
Review Comment:
Nit: why not `for (Map.Entry<Integer, DatanodeDetails> indexDnPair : targetNodeMap.entrySet())`?
##########
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/ec/reconstruction/ECReconstructionCoordinator.java:
##########
@@ -0,0 +1,417 @@
+/*
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.hadoop.ozone.container.ec.reconstruction;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import org.apache.hadoop.hdds.client.BlockID;
+import org.apache.hadoop.hdds.client.ECReplicationConfig;
+import org.apache.hadoop.hdds.conf.ConfigurationSource;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
+import org.apache.hadoop.hdds.scm.ByteStringConversion;
+import org.apache.hadoop.hdds.scm.OzoneClientConfig;
+import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
+import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
+import org.apache.hadoop.hdds.scm.storage.BlockLocationInfo;
+import org.apache.hadoop.hdds.scm.storage.BufferPool;
+import org.apache.hadoop.hdds.scm.storage.ECBlockOutputStream;
+import org.apache.hadoop.hdds.security.x509.certificate.client.CertificateClient;
+import org.apache.hadoop.io.ByteBufferPool;
+import org.apache.hadoop.io.ElasticByteBufferPool;
+import org.apache.hadoop.ozone.OzoneConsts;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactory;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactoryImpl;
+import org.apache.hadoop.ozone.client.io.ECBlockInputStreamProxy;
+import org.apache.hadoop.ozone.client.io.ECBlockReconstructedStripeInputStream;
+import org.apache.hadoop.ozone.container.common.helpers.BlockData;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+/**
+ * The Coordinator implements the main flow of reconstructing
+ * missing container replicas.
+ * <p>
+ * For a container reconstruction task, the main flow is:
+ * - ListBlock from all healthy replicas
+ * - calculate effective block group len for all blocks
+ * - for each block
+ * - build a ReconstructInputStream to read healthy chunks
+ * - build a ECBlockOutputStream to write out decoded chunks
+ * - for each stripe
+ * - use ReconstructInputStream.readStripe to decode missing chunks
+ * - use ECBlockOutputStream.write to write decoded chunks to TargetDNs
+ * - PutBlock
+ * - CloseContainer
+ */
+public class ECReconstructionCoordinator implements Closeable {
+
+ static final Logger LOG =
+ LoggerFactory.getLogger(ECReconstructionCoordinator.class);
+
+ private static final int EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE = 3;
+
+ private final ECContainerOperationClient containerOperationClient;
+
+ private final ConfigurationSource config;
+
+ private final ByteBufferPool byteBufferPool;
+
+ private ExecutorService ecReconstructExecutor;
+
+ private BlockInputStreamFactory blockInputStreamFactory;
+
+ public ECReconstructionCoordinator(ECContainerOperationClient containerClient,
+ ConfigurationSource conf, ByteBufferPool byteBufferPool,
+ ExecutorService reconstructExecutor,
+ BlockInputStreamFactory streamFactory) {
+ this.containerOperationClient = containerClient;
+ this.config = conf;
+ this.byteBufferPool = byteBufferPool;
+ this.blockInputStreamFactory = streamFactory;
+ this.ecReconstructExecutor = reconstructExecutor;
+ }
+
+ public ECReconstructionCoordinator(ConfigurationSource conf,
+ CertificateClient certificateClient) throws IOException {
+ this(new ECContainerOperationClient(conf, certificateClient), conf,
+ new ElasticByteBufferPool(), null, null);
+ this.ecReconstructExecutor =
+ new ThreadPoolExecutor(EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE,
+ config.getObject(OzoneClientConfig.class)
+ .getEcReconstructStripeReadPoolLimit(), 60, TimeUnit.SECONDS,
+ new SynchronousQueue<>(), new ThreadFactoryBuilder()
+ .setNameFormat("ec-reconstruct-reader-TID-%d").build(),
+ new ThreadPoolExecutor.CallerRunsPolicy());
+ this.blockInputStreamFactory = BlockInputStreamFactoryImpl
+ .getInstance(byteBufferPool, () -> ecReconstructExecutor);
+ }
+
+ public void reconstructECContainerGroup(long containerID,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> sourceNodeMap,
+ SortedMap<Integer, DatanodeDetails> targetNodeMap) throws IOException {
+
+ Pipeline pipeline = rebuildInputPipeline(repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockData[]> blockDataMap =
+ getBlockDataMap(containerID, repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockLocationInfo> blockLocationInfoMap =
+ calcBlockLocationInfoMap(containerID, blockDataMap, pipeline);
+
+ // 1. create target recovering containers.
+ Set<Map.Entry<Integer, DatanodeDetails>> targetIndexDns =
+ targetNodeMap.entrySet();
+ Iterator<Map.Entry<Integer, DatanodeDetails>> iterator =
+ targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ Map.Entry<Integer, DatanodeDetails> indexDnPair = iterator.next();
+ this.containerOperationClient
+ .createRecoveringContainer(containerID, indexDnPair.getValue(),
+ repConfig, null, indexDnPair.getKey());
+ }
+
+ // 2. Reconstruct and transfer to targets
+ for (BlockLocationInfo blockLocationInfo : blockLocationInfoMap.values()) {
+ reconstructECBlockGroup(blockLocationInfo, repConfig, targetNodeMap);
+ }
+
+ // 3. Close containers
+ iterator = targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ DatanodeDetails dn = iterator.next().getValue();
+ this.containerOperationClient
+ .closeContainer(containerID, dn, repConfig, null);
+ }
+
+ }
+
+ void reconstructECBlockGroup(BlockLocationInfo blockLocationInfo,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> targetMap)
+ throws IOException {
+ long safeBlockGroupLength = blockLocationInfo.getLength();
+ List<Integer> missingContainerIndexes =
+ targetMap.keySet().stream().collect(Collectors.toList());
+
+ // calculate the real missing block indexes
+ int dataLocs = ECBlockInputStreamProxy
+ .expectedDataLocations(repConfig, safeBlockGroupLength);
+ List<Integer> toReconstructIndexes = new ArrayList<>();
+ for (int i = 0; i < missingContainerIndexes.size(); i++) {
+ Integer index = missingContainerIndexes.get(i);
Review Comment:
Nit:
```suggestion
for (Integer index : missingContainerIndexes) {
```
##########
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/ec/reconstruction/ECReconstructionCoordinator.java:
##########
@@ -0,0 +1,417 @@
+/*
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.hadoop.ozone.container.ec.reconstruction;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import org.apache.hadoop.hdds.client.BlockID;
+import org.apache.hadoop.hdds.client.ECReplicationConfig;
+import org.apache.hadoop.hdds.conf.ConfigurationSource;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
+import org.apache.hadoop.hdds.scm.ByteStringConversion;
+import org.apache.hadoop.hdds.scm.OzoneClientConfig;
+import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
+import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
+import org.apache.hadoop.hdds.scm.storage.BlockLocationInfo;
+import org.apache.hadoop.hdds.scm.storage.BufferPool;
+import org.apache.hadoop.hdds.scm.storage.ECBlockOutputStream;
+import org.apache.hadoop.hdds.security.x509.certificate.client.CertificateClient;
+import org.apache.hadoop.io.ByteBufferPool;
+import org.apache.hadoop.io.ElasticByteBufferPool;
+import org.apache.hadoop.ozone.OzoneConsts;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactory;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactoryImpl;
+import org.apache.hadoop.ozone.client.io.ECBlockInputStreamProxy;
+import org.apache.hadoop.ozone.client.io.ECBlockReconstructedStripeInputStream;
+import org.apache.hadoop.ozone.container.common.helpers.BlockData;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+/**
+ * The Coordinator implements the main flow of reconstructing
+ * missing container replicas.
+ * <p>
+ * For a container reconstruction task, the main flow is:
+ * - ListBlock from all healthy replicas
+ * - calculate effective block group len for all blocks
+ * - for each block
+ * - build a ReconstructInputStream to read healthy chunks
+ * - build a ECBlockOutputStream to write out decoded chunks
+ * - for each stripe
+ * - use ReconstructInputStream.readStripe to decode missing chunks
+ * - use ECBlockOutputStream.write to write decoded chunks to TargetDNs
+ * - PutBlock
+ * - CloseContainer
+ */
+public class ECReconstructionCoordinator implements Closeable {
+
+ static final Logger LOG =
+ LoggerFactory.getLogger(ECReconstructionCoordinator.class);
+
+ private static final int EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE = 3;
+
+ private final ECContainerOperationClient containerOperationClient;
+
+ private final ConfigurationSource config;
+
+ private final ByteBufferPool byteBufferPool;
+
+ private ExecutorService ecReconstructExecutor;
+
+ private BlockInputStreamFactory blockInputStreamFactory;
+
+ public ECReconstructionCoordinator(ECContainerOperationClient containerClient,
+ ConfigurationSource conf, ByteBufferPool byteBufferPool,
+ ExecutorService reconstructExecutor,
+ BlockInputStreamFactory streamFactory) {
+ this.containerOperationClient = containerClient;
+ this.config = conf;
+ this.byteBufferPool = byteBufferPool;
+ this.blockInputStreamFactory = streamFactory;
+ this.ecReconstructExecutor = reconstructExecutor;
+ }
+
+ public ECReconstructionCoordinator(ConfigurationSource conf,
+ CertificateClient certificateClient) throws IOException {
+ this(new ECContainerOperationClient(conf, certificateClient), conf,
+ new ElasticByteBufferPool(), null, null);
+ this.ecReconstructExecutor =
+ new ThreadPoolExecutor(EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE,
+ config.getObject(OzoneClientConfig.class)
+ .getEcReconstructStripeReadPoolLimit(), 60, TimeUnit.SECONDS,
+ new SynchronousQueue<>(), new ThreadFactoryBuilder()
+ .setNameFormat("ec-reconstruct-reader-TID-%d").build(),
+ new ThreadPoolExecutor.CallerRunsPolicy());
+ this.blockInputStreamFactory = BlockInputStreamFactoryImpl
+ .getInstance(byteBufferPool, () -> ecReconstructExecutor);
+ }
+
+ public void reconstructECContainerGroup(long containerID,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> sourceNodeMap,
+ SortedMap<Integer, DatanodeDetails> targetNodeMap) throws IOException {
+
+ Pipeline pipeline = rebuildInputPipeline(repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockData[]> blockDataMap =
+ getBlockDataMap(containerID, repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockLocationInfo> blockLocationInfoMap =
+ calcBlockLocationInfoMap(containerID, blockDataMap, pipeline);
+
+ // 1. create target recovering containers.
+ Set<Map.Entry<Integer, DatanodeDetails>> targetIndexDns =
+ targetNodeMap.entrySet();
+ Iterator<Map.Entry<Integer, DatanodeDetails>> iterator =
+ targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ Map.Entry<Integer, DatanodeDetails> indexDnPair = iterator.next();
+ this.containerOperationClient
+ .createRecoveringContainer(containerID, indexDnPair.getValue(),
+ repConfig, null, indexDnPair.getKey());
+ }
+
+ // 2. Reconstruct and transfer to targets
+ for (BlockLocationInfo blockLocationInfo : blockLocationInfoMap.values()) {
+ reconstructECBlockGroup(blockLocationInfo, repConfig, targetNodeMap);
+ }
+
+ // 3. Close containers
+ iterator = targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ DatanodeDetails dn = iterator.next().getValue();
+ this.containerOperationClient
+ .closeContainer(containerID, dn, repConfig, null);
+ }
+
+ }
+
+ void reconstructECBlockGroup(BlockLocationInfo blockLocationInfo,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> targetMap)
+ throws IOException {
+ long safeBlockGroupLength = blockLocationInfo.getLength();
+ List<Integer> missingContainerIndexes =
+ targetMap.keySet().stream().collect(Collectors.toList());
Review Comment:
Can be simplified to `new ArrayList<>(targetMap.keySet())` or is some filter missing here?
##########
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/ec/reconstruction/ECContainerOperationClient.java:
##########
@@ -0,0 +1,147 @@
+/*
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.hadoop.ozone.container.ec.reconstruction;
+
+import com.google.common.collect.ImmutableList;
+import org.apache.hadoop.hdds.client.ECReplicationConfig;
+import org.apache.hadoop.hdds.conf.ConfigurationSource;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
+import org.apache.hadoop.hdds.scm.XceiverClientManager;
+import org.apache.hadoop.hdds.scm.XceiverClientSpi;
+import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
+import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
+import org.apache.hadoop.hdds.scm.storage.ContainerProtocolCalls;
+import org.apache.hadoop.hdds.security.x509.certificate.client.CertificateClient;
+import org.apache.hadoop.hdds.utils.HAUtils;
+import org.apache.hadoop.ozone.container.common.helpers.BlockData;
+import org.apache.hadoop.security.token.Token;
+import org.apache.hadoop.security.token.TokenIdentifier;
+import org.jetbrains.annotations.NotNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * This class wraps necessary container-level rpc calls
+ * during ec offline reconstruction.
+ * - ListBlock
+ * - CloseContainer
+ */
+public class ECContainerOperationClient implements Closeable {
+ private static final Logger LOG =
+ LoggerFactory.getLogger(ECContainerOperationClient.class);
+ private final XceiverClientManager xceiverClientManager;
+
+ public ECContainerOperationClient(XceiverClientManager clientManager) {
+ this.xceiverClientManager = clientManager;
+ }
+
+ public ECContainerOperationClient(ConfigurationSource conf,
+ CertificateClient certificateClient) throws IOException {
+ this(createClientManager(conf, certificateClient));
+ }
+
+ @NotNull
+ private static XceiverClientManager createClientManager(
+ ConfigurationSource conf, CertificateClient certificateClient)
+ throws IOException {
+ return new XceiverClientManager(conf,
+ new XceiverClientManager.XceiverClientManagerConfigBuilder()
+ .setMaxCacheSize(256).setStaleThresholdMs(10 * 1000).build(),
+ certificateClient != null ?
+ HAUtils.buildCAX509List(certificateClient, conf) :
+ null);
+ }
+
+ public BlockData[] listBlock(long containerId, DatanodeDetails dn,
+ ECReplicationConfig repConfig, Token<? extends TokenIdentifier> token)
+ throws IOException {
+ XceiverClientSpi xceiverClient = this.xceiverClientManager.acquireClient(
+ Pipeline.newBuilder().setId(PipelineID.valueOf(dn.getUuid()))
+ .setReplicationConfig(repConfig).setNodes(ImmutableList.of(dn))
+ .setState(Pipeline.PipelineState.CLOSED).build());
+ try {
+ List<ContainerProtos.BlockData> blockDataList = ContainerProtocolCalls
+ .listBlock(xceiverClient, containerId, null, Integer.MAX_VALUE, token)
+ .getBlockDataList();
+ return blockDataList.stream().map(i -> {
+ try {
+ return BlockData.getFromProtoBuf(i);
+ } catch (IOException e) {
+ LOG.debug("Failed while converting to protobuf BlockData. Returning"
+ + " null for listBlock from DN: " + dn,
+ e);
+ // TODO: revisit here.
+ return null;
+ }
+ }).collect(Collectors.toList())
+ .toArray(new BlockData[blockDataList.size()]);
+ } finally {
+ this.xceiverClientManager.releaseClient(xceiverClient, false);
+ }
+ }
+
+ public void closeContainer(long containerID, DatanodeDetails dn,
+ ECReplicationConfig repConfig, String encodedToken) throws IOException {
+ XceiverClientSpi xceiverClient = this.xceiverClientManager.acquireClient(
+ Pipeline.newBuilder().setId(PipelineID.valueOf(dn.getUuid()))
+ .setReplicationConfig(repConfig).setNodes(ImmutableList.of(dn))
+ .setState(Pipeline.PipelineState.CLOSED).build());
+ try {
+ ContainerProtocolCalls
+ .closeContainer(xceiverClient, containerID, encodedToken);
+ } finally {
+ this.xceiverClientManager.releaseClient(xceiverClient, false);
+ }
+ }
+
+ public void createRecoveringContainer(long containerID, DatanodeDetails dn,
+ ECReplicationConfig repConfig, String encodedToken, int replicaIndex)
+ throws IOException {
+ XceiverClientSpi xceiverClient = this.xceiverClientManager.acquireClient(
+ // To get the same client from cache, we try to use the DN UUID as
+ // pipelineID for uniqueness. Please note, pipeline does not have any
+ // significance after it's close. So, we are ok to use any ID.
+ Pipeline.newBuilder().setId(PipelineID.valueOf(dn.getUuid()))
+ .setReplicationConfig(repConfig).setNodes(ImmutableList.of(dn))
+ .setState(Pipeline.PipelineState.CLOSED).build());
Review Comment:
Can you please extract a method for this pipeline creation? It is repeated in a few places.
##########
hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/storage/ECBlockOutputStream.java:
##########
@@ -80,6 +80,10 @@ public void write(byte[] b, int off, int len) throws IOException {
writeChunkToContainer(ChunkBuffer.wrap(ByteBuffer.wrap(b, off, len)));
}
+ public void write(ByteBuffer buff) throws IOException {
+ this.currentChunkRspFuture = writeChunkToContainer(ChunkBuffer.wrap(buff));
Review Comment:
Nit: should it return the future and let coordinator use it directly instead of `getCurrent...`?
##########
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/ec/reconstruction/ECReconstructionCoordinator.java:
##########
@@ -0,0 +1,417 @@
+/*
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.hadoop.ozone.container.ec.reconstruction;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import org.apache.hadoop.hdds.client.BlockID;
+import org.apache.hadoop.hdds.client.ECReplicationConfig;
+import org.apache.hadoop.hdds.conf.ConfigurationSource;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
+import org.apache.hadoop.hdds.scm.ByteStringConversion;
+import org.apache.hadoop.hdds.scm.OzoneClientConfig;
+import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
+import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
+import org.apache.hadoop.hdds.scm.storage.BlockLocationInfo;
+import org.apache.hadoop.hdds.scm.storage.BufferPool;
+import org.apache.hadoop.hdds.scm.storage.ECBlockOutputStream;
+import org.apache.hadoop.hdds.security.x509.certificate.client.CertificateClient;
+import org.apache.hadoop.io.ByteBufferPool;
+import org.apache.hadoop.io.ElasticByteBufferPool;
+import org.apache.hadoop.ozone.OzoneConsts;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactory;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactoryImpl;
+import org.apache.hadoop.ozone.client.io.ECBlockInputStreamProxy;
+import org.apache.hadoop.ozone.client.io.ECBlockReconstructedStripeInputStream;
+import org.apache.hadoop.ozone.container.common.helpers.BlockData;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+/**
+ * The Coordinator implements the main flow of reconstructing
+ * missing container replicas.
+ * <p>
+ * For a container reconstruction task, the main flow is:
+ * - ListBlock from all healthy replicas
+ * - calculate effective block group len for all blocks
+ * - for each block
+ * - build a ReconstructInputStream to read healthy chunks
+ * - build a ECBlockOutputStream to write out decoded chunks
+ * - for each stripe
+ * - use ReconstructInputStream.readStripe to decode missing chunks
+ * - use ECBlockOutputStream.write to write decoded chunks to TargetDNs
+ * - PutBlock
+ * - CloseContainer
+ */
+public class ECReconstructionCoordinator implements Closeable {
+
+ static final Logger LOG =
+ LoggerFactory.getLogger(ECReconstructionCoordinator.class);
+
+ private static final int EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE = 3;
+
+ private final ECContainerOperationClient containerOperationClient;
+
+ private final ConfigurationSource config;
+
+ private final ByteBufferPool byteBufferPool;
+
+ private ExecutorService ecReconstructExecutor;
+
+ private BlockInputStreamFactory blockInputStreamFactory;
+
+ public ECReconstructionCoordinator(ECContainerOperationClient containerClient,
+ ConfigurationSource conf, ByteBufferPool byteBufferPool,
+ ExecutorService reconstructExecutor,
+ BlockInputStreamFactory streamFactory) {
+ this.containerOperationClient = containerClient;
+ this.config = conf;
+ this.byteBufferPool = byteBufferPool;
+ this.blockInputStreamFactory = streamFactory;
+ this.ecReconstructExecutor = reconstructExecutor;
+ }
+
+ public ECReconstructionCoordinator(ConfigurationSource conf,
+ CertificateClient certificateClient) throws IOException {
+ this(new ECContainerOperationClient(conf, certificateClient), conf,
+ new ElasticByteBufferPool(), null, null);
+ this.ecReconstructExecutor =
+ new ThreadPoolExecutor(EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE,
+ config.getObject(OzoneClientConfig.class)
+ .getEcReconstructStripeReadPoolLimit(), 60, TimeUnit.SECONDS,
+ new SynchronousQueue<>(), new ThreadFactoryBuilder()
+ .setNameFormat("ec-reconstruct-reader-TID-%d").build(),
+ new ThreadPoolExecutor.CallerRunsPolicy());
+ this.blockInputStreamFactory = BlockInputStreamFactoryImpl
+ .getInstance(byteBufferPool, () -> ecReconstructExecutor);
+ }
+
+ public void reconstructECContainerGroup(long containerID,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> sourceNodeMap,
+ SortedMap<Integer, DatanodeDetails> targetNodeMap) throws IOException {
+
+ Pipeline pipeline = rebuildInputPipeline(repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockData[]> blockDataMap =
+ getBlockDataMap(containerID, repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockLocationInfo> blockLocationInfoMap =
+ calcBlockLocationInfoMap(containerID, blockDataMap, pipeline);
+
+ // 1. create target recovering containers.
+ Set<Map.Entry<Integer, DatanodeDetails>> targetIndexDns =
+ targetNodeMap.entrySet();
+ Iterator<Map.Entry<Integer, DatanodeDetails>> iterator =
+ targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ Map.Entry<Integer, DatanodeDetails> indexDnPair = iterator.next();
+ this.containerOperationClient
+ .createRecoveringContainer(containerID, indexDnPair.getValue(),
+ repConfig, null, indexDnPair.getKey());
+ }
+
+ // 2. Reconstruct and transfer to targets
+ for (BlockLocationInfo blockLocationInfo : blockLocationInfoMap.values()) {
+ reconstructECBlockGroup(blockLocationInfo, repConfig, targetNodeMap);
+ }
+
+ // 3. Close containers
+ iterator = targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ DatanodeDetails dn = iterator.next().getValue();
+ this.containerOperationClient
+ .closeContainer(containerID, dn, repConfig, null);
+ }
+
+ }
+
+ void reconstructECBlockGroup(BlockLocationInfo blockLocationInfo,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> targetMap)
+ throws IOException {
+ long safeBlockGroupLength = blockLocationInfo.getLength();
+ List<Integer> missingContainerIndexes =
+ targetMap.keySet().stream().collect(Collectors.toList());
+
+ // calculate the real missing block indexes
+ int dataLocs = ECBlockInputStreamProxy
+ .expectedDataLocations(repConfig, safeBlockGroupLength);
+ List<Integer> toReconstructIndexes = new ArrayList<>();
+ for (int i = 0; i < missingContainerIndexes.size(); i++) {
+ Integer index = missingContainerIndexes.get(i);
+ if (index <= dataLocs || index > repConfig.getData()) {
+ toReconstructIndexes.add(index);
+ }
+ // else padded indexes.
+ }
+
+ // Looks like we don't need to reconstruct any missing blocks in this block
+ // group. The reason for this should be block group had only padding blocks
+ // in the missing locations.
+ if (toReconstructIndexes.size() == 0) {
+ if (LOG.isDebugEnabled()) {
+ LOG.debug("Skipping the reconstruction for the block: "
+ + blockLocationInfo.getBlockID() + ". In the missing locations: "
+ + missingContainerIndexes
+ + ", this block group has only padded blocks.");
+ }
+ return;
+ }
+
+ try (ECBlockReconstructedStripeInputStream sis
+ = new ECBlockReconstructedStripeInputStream(
+ repConfig, blockLocationInfo, true,
+ this.containerOperationClient.getXceiverClientManager(), null,
+ this.blockInputStreamFactory, byteBufferPool,
+ this.ecReconstructExecutor)) {
+
+ ECBlockOutputStream[] targetBlockStreams =
+ new ECBlockOutputStream[toReconstructIndexes.size()];
+ ByteBuffer[] bufs = new ByteBuffer[toReconstructIndexes.size()];
+ for (int i = 0; i < toReconstructIndexes.size(); i++) {
+ OzoneClientConfig configuration = new OzoneClientConfig();
+ // TODO: Let's avoid unnecessary bufferPool creation for
+ BufferPool bufferPool =
+ new BufferPool(configuration.getStreamBufferSize(),
+ (int) (configuration.getStreamBufferMaxSize() / configuration
+ .getStreamBufferSize()),
+ ByteStringConversion.createByteBufferConversion(false));
Review Comment:
Nit: not sure what the TODO is about, but at least this can be moved outside the loop.
##########
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/ec/reconstruction/ECReconstructionCoordinator.java:
##########
@@ -0,0 +1,417 @@
+/*
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.hadoop.ozone.container.ec.reconstruction;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import org.apache.hadoop.hdds.client.BlockID;
+import org.apache.hadoop.hdds.client.ECReplicationConfig;
+import org.apache.hadoop.hdds.conf.ConfigurationSource;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
+import org.apache.hadoop.hdds.scm.ByteStringConversion;
+import org.apache.hadoop.hdds.scm.OzoneClientConfig;
+import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
+import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
+import org.apache.hadoop.hdds.scm.storage.BlockLocationInfo;
+import org.apache.hadoop.hdds.scm.storage.BufferPool;
+import org.apache.hadoop.hdds.scm.storage.ECBlockOutputStream;
+import org.apache.hadoop.hdds.security.x509.certificate.client.CertificateClient;
+import org.apache.hadoop.io.ByteBufferPool;
+import org.apache.hadoop.io.ElasticByteBufferPool;
+import org.apache.hadoop.ozone.OzoneConsts;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactory;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactoryImpl;
+import org.apache.hadoop.ozone.client.io.ECBlockInputStreamProxy;
+import org.apache.hadoop.ozone.client.io.ECBlockReconstructedStripeInputStream;
+import org.apache.hadoop.ozone.container.common.helpers.BlockData;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+/**
+ * The Coordinator implements the main flow of reconstructing
+ * missing container replicas.
+ * <p>
+ * For a container reconstruction task, the main flow is:
+ * - ListBlock from all healthy replicas
+ * - calculate effective block group len for all blocks
+ * - for each block
+ * - build a ReconstructInputStream to read healthy chunks
+ * - build a ECBlockOutputStream to write out decoded chunks
+ * - for each stripe
+ * - use ReconstructInputStream.readStripe to decode missing chunks
+ * - use ECBlockOutputStream.write to write decoded chunks to TargetDNs
+ * - PutBlock
+ * - CloseContainer
+ */
+public class ECReconstructionCoordinator implements Closeable {
+
+ static final Logger LOG =
+ LoggerFactory.getLogger(ECReconstructionCoordinator.class);
+
+ private static final int EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE = 3;
+
+ private final ECContainerOperationClient containerOperationClient;
+
+ private final ConfigurationSource config;
+
+ private final ByteBufferPool byteBufferPool;
+
+ private ExecutorService ecReconstructExecutor;
+
+ private BlockInputStreamFactory blockInputStreamFactory;
+
+ public ECReconstructionCoordinator(ECContainerOperationClient containerClient,
+ ConfigurationSource conf, ByteBufferPool byteBufferPool,
+ ExecutorService reconstructExecutor,
+ BlockInputStreamFactory streamFactory) {
+ this.containerOperationClient = containerClient;
+ this.config = conf;
+ this.byteBufferPool = byteBufferPool;
+ this.blockInputStreamFactory = streamFactory;
+ this.ecReconstructExecutor = reconstructExecutor;
+ }
+
+ public ECReconstructionCoordinator(ConfigurationSource conf,
+ CertificateClient certificateClient) throws IOException {
+ this(new ECContainerOperationClient(conf, certificateClient), conf,
+ new ElasticByteBufferPool(), null, null);
+ this.ecReconstructExecutor =
+ new ThreadPoolExecutor(EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE,
+ config.getObject(OzoneClientConfig.class)
+ .getEcReconstructStripeReadPoolLimit(), 60, TimeUnit.SECONDS,
+ new SynchronousQueue<>(), new ThreadFactoryBuilder()
+ .setNameFormat("ec-reconstruct-reader-TID-%d").build(),
+ new ThreadPoolExecutor.CallerRunsPolicy());
+ this.blockInputStreamFactory = BlockInputStreamFactoryImpl
+ .getInstance(byteBufferPool, () -> ecReconstructExecutor);
+ }
+
+ public void reconstructECContainerGroup(long containerID,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> sourceNodeMap,
+ SortedMap<Integer, DatanodeDetails> targetNodeMap) throws IOException {
+
+ Pipeline pipeline = rebuildInputPipeline(repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockData[]> blockDataMap =
+ getBlockDataMap(containerID, repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockLocationInfo> blockLocationInfoMap =
+ calcBlockLocationInfoMap(containerID, blockDataMap, pipeline);
+
+ // 1. create target recovering containers.
+ Set<Map.Entry<Integer, DatanodeDetails>> targetIndexDns =
+ targetNodeMap.entrySet();
+ Iterator<Map.Entry<Integer, DatanodeDetails>> iterator =
+ targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ Map.Entry<Integer, DatanodeDetails> indexDnPair = iterator.next();
+ this.containerOperationClient
+ .createRecoveringContainer(containerID, indexDnPair.getValue(),
+ repConfig, null, indexDnPair.getKey());
+ }
+
+ // 2. Reconstruct and transfer to targets
+ for (BlockLocationInfo blockLocationInfo : blockLocationInfoMap.values()) {
+ reconstructECBlockGroup(blockLocationInfo, repConfig, targetNodeMap);
+ }
+
+ // 3. Close containers
+ iterator = targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ DatanodeDetails dn = iterator.next().getValue();
+ this.containerOperationClient
+ .closeContainer(containerID, dn, repConfig, null);
+ }
+
+ }
+
+ void reconstructECBlockGroup(BlockLocationInfo blockLocationInfo,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> targetMap)
+ throws IOException {
+ long safeBlockGroupLength = blockLocationInfo.getLength();
+ List<Integer> missingContainerIndexes =
+ targetMap.keySet().stream().collect(Collectors.toList());
+
+ // calculate the real missing block indexes
+ int dataLocs = ECBlockInputStreamProxy
+ .expectedDataLocations(repConfig, safeBlockGroupLength);
+ List<Integer> toReconstructIndexes = new ArrayList<>();
+ for (int i = 0; i < missingContainerIndexes.size(); i++) {
+ Integer index = missingContainerIndexes.get(i);
+ if (index <= dataLocs || index > repConfig.getData()) {
+ toReconstructIndexes.add(index);
+ }
+ // else padded indexes.
+ }
+
+ // Looks like we don't need to reconstruct any missing blocks in this block
+ // group. The reason for this should be block group had only padding blocks
+ // in the missing locations.
+ if (toReconstructIndexes.size() == 0) {
+ if (LOG.isDebugEnabled()) {
+ LOG.debug("Skipping the reconstruction for the block: "
+ + blockLocationInfo.getBlockID() + ". In the missing locations: "
+ + missingContainerIndexes
+ + ", this block group has only padded blocks.");
+ }
+ return;
+ }
+
+ try (ECBlockReconstructedStripeInputStream sis
+ = new ECBlockReconstructedStripeInputStream(
+ repConfig, blockLocationInfo, true,
+ this.containerOperationClient.getXceiverClientManager(), null,
+ this.blockInputStreamFactory, byteBufferPool,
+ this.ecReconstructExecutor)) {
+
+ ECBlockOutputStream[] targetBlockStreams =
+ new ECBlockOutputStream[toReconstructIndexes.size()];
+ ByteBuffer[] bufs = new ByteBuffer[toReconstructIndexes.size()];
+ for (int i = 0; i < toReconstructIndexes.size(); i++) {
+ OzoneClientConfig configuration = new OzoneClientConfig();
+ // TODO: Let's avoid unnecessary bufferPool creation for
+ BufferPool bufferPool =
+ new BufferPool(configuration.getStreamBufferSize(),
+ (int) (configuration.getStreamBufferMaxSize() / configuration
+ .getStreamBufferSize()),
+ ByteStringConversion.createByteBufferConversion(false));
+ targetBlockStreams[i] =
+ new ECBlockOutputStream(blockLocationInfo.getBlockID(),
+ this.containerOperationClient.getXceiverClientManager(),
+ Pipeline.newBuilder().setId(PipelineID.valueOf(
+ targetMap.get(toReconstructIndexes.get(i)).getUuid()))
+ .setReplicationConfig(repConfig).setNodes(ImmutableList
+ .of(targetMap.get(toReconstructIndexes.get(i))))
+ .setState(Pipeline.PipelineState.CLOSED).build(),
Review Comment:
Nit: please assign `targetMap.get(toReconstructIndexes.get(i))` to local var, and reuse suggested helper method from `ECContainerOperationClient`.
##########
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/ec/reconstruction/ECReconstructionCoordinator.java:
##########
@@ -0,0 +1,417 @@
+/*
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.hadoop.ozone.container.ec.reconstruction;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import org.apache.hadoop.hdds.client.BlockID;
+import org.apache.hadoop.hdds.client.ECReplicationConfig;
+import org.apache.hadoop.hdds.conf.ConfigurationSource;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
+import org.apache.hadoop.hdds.scm.ByteStringConversion;
+import org.apache.hadoop.hdds.scm.OzoneClientConfig;
+import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
+import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
+import org.apache.hadoop.hdds.scm.storage.BlockLocationInfo;
+import org.apache.hadoop.hdds.scm.storage.BufferPool;
+import org.apache.hadoop.hdds.scm.storage.ECBlockOutputStream;
+import org.apache.hadoop.hdds.security.x509.certificate.client.CertificateClient;
+import org.apache.hadoop.io.ByteBufferPool;
+import org.apache.hadoop.io.ElasticByteBufferPool;
+import org.apache.hadoop.ozone.OzoneConsts;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactory;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactoryImpl;
+import org.apache.hadoop.ozone.client.io.ECBlockInputStreamProxy;
+import org.apache.hadoop.ozone.client.io.ECBlockReconstructedStripeInputStream;
+import org.apache.hadoop.ozone.container.common.helpers.BlockData;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+/**
+ * The Coordinator implements the main flow of reconstructing
+ * missing container replicas.
+ * <p>
+ * For a container reconstruction task, the main flow is:
+ * - ListBlock from all healthy replicas
+ * - calculate effective block group len for all blocks
+ * - for each block
+ * - build a ReconstructInputStream to read healthy chunks
+ * - build a ECBlockOutputStream to write out decoded chunks
+ * - for each stripe
+ * - use ReconstructInputStream.readStripe to decode missing chunks
+ * - use ECBlockOutputStream.write to write decoded chunks to TargetDNs
+ * - PutBlock
+ * - CloseContainer
+ */
+public class ECReconstructionCoordinator implements Closeable {
+
+ static final Logger LOG =
+ LoggerFactory.getLogger(ECReconstructionCoordinator.class);
+
+ private static final int EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE = 3;
+
+ private final ECContainerOperationClient containerOperationClient;
+
+ private final ConfigurationSource config;
+
+ private final ByteBufferPool byteBufferPool;
+
+ private ExecutorService ecReconstructExecutor;
+
+ private BlockInputStreamFactory blockInputStreamFactory;
+
+ public ECReconstructionCoordinator(ECContainerOperationClient containerClient,
+ ConfigurationSource conf, ByteBufferPool byteBufferPool,
+ ExecutorService reconstructExecutor,
+ BlockInputStreamFactory streamFactory) {
+ this.containerOperationClient = containerClient;
+ this.config = conf;
+ this.byteBufferPool = byteBufferPool;
+ this.blockInputStreamFactory = streamFactory;
+ this.ecReconstructExecutor = reconstructExecutor;
+ }
+
+ public ECReconstructionCoordinator(ConfigurationSource conf,
+ CertificateClient certificateClient) throws IOException {
+ this(new ECContainerOperationClient(conf, certificateClient), conf,
+ new ElasticByteBufferPool(), null, null);
+ this.ecReconstructExecutor =
+ new ThreadPoolExecutor(EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE,
+ config.getObject(OzoneClientConfig.class)
+ .getEcReconstructStripeReadPoolLimit(), 60, TimeUnit.SECONDS,
+ new SynchronousQueue<>(), new ThreadFactoryBuilder()
+ .setNameFormat("ec-reconstruct-reader-TID-%d").build(),
+ new ThreadPoolExecutor.CallerRunsPolicy());
+ this.blockInputStreamFactory = BlockInputStreamFactoryImpl
+ .getInstance(byteBufferPool, () -> ecReconstructExecutor);
+ }
+
+ public void reconstructECContainerGroup(long containerID,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> sourceNodeMap,
+ SortedMap<Integer, DatanodeDetails> targetNodeMap) throws IOException {
+
+ Pipeline pipeline = rebuildInputPipeline(repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockData[]> blockDataMap =
+ getBlockDataMap(containerID, repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockLocationInfo> blockLocationInfoMap =
+ calcBlockLocationInfoMap(containerID, blockDataMap, pipeline);
+
+ // 1. create target recovering containers.
+ Set<Map.Entry<Integer, DatanodeDetails>> targetIndexDns =
+ targetNodeMap.entrySet();
+ Iterator<Map.Entry<Integer, DatanodeDetails>> iterator =
+ targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ Map.Entry<Integer, DatanodeDetails> indexDnPair = iterator.next();
+ this.containerOperationClient
+ .createRecoveringContainer(containerID, indexDnPair.getValue(),
+ repConfig, null, indexDnPair.getKey());
+ }
+
+ // 2. Reconstruct and transfer to targets
+ for (BlockLocationInfo blockLocationInfo : blockLocationInfoMap.values()) {
+ reconstructECBlockGroup(blockLocationInfo, repConfig, targetNodeMap);
+ }
+
+ // 3. Close containers
+ iterator = targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ DatanodeDetails dn = iterator.next().getValue();
+ this.containerOperationClient
+ .closeContainer(containerID, dn, repConfig, null);
+ }
+
+ }
+
+ void reconstructECBlockGroup(BlockLocationInfo blockLocationInfo,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> targetMap)
+ throws IOException {
+ long safeBlockGroupLength = blockLocationInfo.getLength();
+ List<Integer> missingContainerIndexes =
+ targetMap.keySet().stream().collect(Collectors.toList());
+
+ // calculate the real missing block indexes
+ int dataLocs = ECBlockInputStreamProxy
+ .expectedDataLocations(repConfig, safeBlockGroupLength);
+ List<Integer> toReconstructIndexes = new ArrayList<>();
+ for (int i = 0; i < missingContainerIndexes.size(); i++) {
+ Integer index = missingContainerIndexes.get(i);
+ if (index <= dataLocs || index > repConfig.getData()) {
+ toReconstructIndexes.add(index);
+ }
+ // else padded indexes.
+ }
+
+ // Looks like we don't need to reconstruct any missing blocks in this block
+ // group. The reason for this should be block group had only padding blocks
+ // in the missing locations.
+ if (toReconstructIndexes.size() == 0) {
+ if (LOG.isDebugEnabled()) {
+ LOG.debug("Skipping the reconstruction for the block: "
+ + blockLocationInfo.getBlockID() + ". In the missing locations: "
+ + missingContainerIndexes
+ + ", this block group has only padded blocks.");
+ }
+ return;
+ }
+
+ try (ECBlockReconstructedStripeInputStream sis
+ = new ECBlockReconstructedStripeInputStream(
+ repConfig, blockLocationInfo, true,
+ this.containerOperationClient.getXceiverClientManager(), null,
+ this.blockInputStreamFactory, byteBufferPool,
+ this.ecReconstructExecutor)) {
+
+ ECBlockOutputStream[] targetBlockStreams =
+ new ECBlockOutputStream[toReconstructIndexes.size()];
+ ByteBuffer[] bufs = new ByteBuffer[toReconstructIndexes.size()];
+ for (int i = 0; i < toReconstructIndexes.size(); i++) {
+ OzoneClientConfig configuration = new OzoneClientConfig();
+ // TODO: Let's avoid unnecessary bufferPool creation for
+ BufferPool bufferPool =
+ new BufferPool(configuration.getStreamBufferSize(),
+ (int) (configuration.getStreamBufferMaxSize() / configuration
+ .getStreamBufferSize()),
+ ByteStringConversion.createByteBufferConversion(false));
+ targetBlockStreams[i] =
+ new ECBlockOutputStream(blockLocationInfo.getBlockID(),
+ this.containerOperationClient.getXceiverClientManager(),
+ Pipeline.newBuilder().setId(PipelineID.valueOf(
+ targetMap.get(toReconstructIndexes.get(i)).getUuid()))
+ .setReplicationConfig(repConfig).setNodes(ImmutableList
+ .of(targetMap.get(toReconstructIndexes.get(i))))
+ .setState(Pipeline.PipelineState.CLOSED).build(),
+ bufferPool, configuration, blockLocationInfo.getToken());
+ bufs[i] = byteBufferPool.getBuffer(false, repConfig.getEcChunkSize());
+ // Make sure it's clean. Don't want to reuse the erroneously returned
+ // buffers from the pool.
+ bufs[i].clear();
+ }
+
+ sis.setRecoveryIndexes(toReconstructIndexes.stream().map(i -> (i - 1))
+ .collect(Collectors.toSet()));
+ long length = safeBlockGroupLength;
+ while (length > 0) {
+ int readLen = sis.recoverChunks(bufs);
+ // TODO: can be submitted in parallel
+ for (int i = 0; i < bufs.length; i++) {
+ targetBlockStreams[i].write(bufs[i]);
+ if (isFailed(targetBlockStreams[i],
+ targetBlockStreams[i].getCurrentChunkResponseFuture())) {
+ // If one chunk response failed, we should retry.
+ // Even after retries if it failed, we should declare the
+ // reconstruction as failed.
+ // For now, let's throw the exception.
+ throw new IOException(
+ "Chunk write failed at the new target node: "
+ + targetBlockStreams[i].getDatanodeDetails()
+ + ". Aborting the reconstruction process.");
+ }
+ bufs[i].clear();
+ }
+ length -= readLen;
+ }
+
+ for (int i = 0; i < targetBlockStreams.length; i++) {
+ try {
+ targetBlockStreams[i]
+ .executePutBlock(true, true, blockLocationInfo.getLength());
+ if (isFailed(targetBlockStreams[i],
+ targetBlockStreams[i].getCurrentPutBlkResponseFuture())) {
+ // If one chunk response failed, we should retry.
+ // Even after retries if it failed, we should declare the
+ // reconstruction as failed.
+ // For now, let's throw the exception.
+ throw new IOException(
+ "Chunk write failed at the new target node: "
+ + targetBlockStreams[i].getDatanodeDetails()
+ + ". Aborting the reconstruction process.");
+ }
+ } finally {
+ byteBufferPool.putBuffer(bufs[i]);
+ targetBlockStreams[i].close();
Review Comment:
Loop would exit on first failed stream. Seems like cleanup is not performed on the remaining ones.
##########
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/hdds/scm/storage/TestContainerCommandsEC.java:
##########
@@ -278,6 +292,274 @@ public void testCreateRecoveryContainer() throws Exception {
}
}
+ private static byte[] getBytesWith(int singleDigitNumber, int total) {
+ StringBuilder builder = new StringBuilder(singleDigitNumber);
+ for (int i = 1; i <= total; i++) {
+ builder.append(singleDigitNumber);
+ }
+ return builder.toString().getBytes(UTF_8);
+ }
+
+ /**
+ * Tests the reconstruction of single missed data index.
+ */
+ @Test
+ public void testECReconstructionCoordinatorWithMissingIndexes1()
+ throws Exception {
+ testECReconstructionCoordinator(ImmutableList.of(1));
+ }
+
+ /**
+ * Tests the reconstruction of single missed data index.
+ */
+ @Test
+ public void testECReconstructionCoordinatorWithMissingIndexes2()
+ throws Exception {
+ testECReconstructionCoordinator(ImmutableList.of(2));
+ }
+
+ /**
+ * Tests the reconstruction of single missed data index.
+ */
+ @Test
+ public void testECReconstructionCoordinatorWithMissingIndexes3()
+ throws Exception {
+ testECReconstructionCoordinator(ImmutableList.of(3));
+ }
+
+ /**
+ * Tests the reconstruction of single missed parity index.
+ */
+ @Test
+ public void testECReconstructionCoordinatorWithMissingIndexes4()
+ throws Exception {
+ testECReconstructionCoordinator(ImmutableList.of(4));
+ }
+
+ /**
+ * Tests the reconstruction of single missed parity index.
+ */
+ @Test
+ public void testECReconstructionCoordinatorWithMissingIndexes5()
+ throws Exception {
+ testECReconstructionCoordinator(ImmutableList.of(5));
+ }
+
+ /**
+ * Tests the reconstruction of all missed parity indexes.
+ */
+ @Test
+ public void testECReconstructionCoordinatorWithMissingIndexes45()
+ throws Exception {
+ testECReconstructionCoordinator(ImmutableList.of(4, 5));
+ }
+
+ /**
+ * Tests the reconstruction of multiple data indexes missed.
+ */
+ @Test
+ public void testECReconstructionCoordinatorWithMissingIndexes23()
+ throws Exception {
+ testECReconstructionCoordinator(ImmutableList.of(2, 3));
+ }
+
+ /**
+ * Tests the reconstruction of data and parity missing indexes.
+ */
+ @Test
+ public void testECReconstructionCoordinatorWithMissingIndexes24()
+ throws Exception {
+ testECReconstructionCoordinator(ImmutableList.of(2, 4));
+ }
+
+ /**
+ * Tests the reconstruction of data and parity missing indexes.
+ */
+ @Test
+ public void testECReconstructionCoordinatorWithMissingIndexes35()
+ throws Exception {
+ testECReconstructionCoordinator(ImmutableList.of(3, 5));
+ }
Review Comment:
Can be done with single parameterized test:
```suggestion
@ParameterizedTest
@MethodSource("recoverableMissingIndexes")
void testECReconstructionCoordinatorWith(List<Integer> missingIndexes)
throws Exception {
testECReconstructionCoordinator(missingIndexes);
}
static Stream<List<Integer>> recoverableMissingIndexes() {
return Stream.concat(
IntStream.rangeClosed(1, 5).mapToObj(ImmutableList::of),
Stream.of(
ImmutableList.of(2, 3),
ImmutableList.of(2, 4),
ImmutableList.of(3, 5),
ImmutableList.of(4, 5)
);
}
```
(+ needs imports)
##########
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/ec/reconstruction/ECReconstructionCoordinator.java:
##########
@@ -0,0 +1,417 @@
+/*
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.hadoop.ozone.container.ec.reconstruction;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import org.apache.hadoop.hdds.client.BlockID;
+import org.apache.hadoop.hdds.client.ECReplicationConfig;
+import org.apache.hadoop.hdds.conf.ConfigurationSource;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
+import org.apache.hadoop.hdds.scm.ByteStringConversion;
+import org.apache.hadoop.hdds.scm.OzoneClientConfig;
+import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
+import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
+import org.apache.hadoop.hdds.scm.storage.BlockLocationInfo;
+import org.apache.hadoop.hdds.scm.storage.BufferPool;
+import org.apache.hadoop.hdds.scm.storage.ECBlockOutputStream;
+import org.apache.hadoop.hdds.security.x509.certificate.client.CertificateClient;
+import org.apache.hadoop.io.ByteBufferPool;
+import org.apache.hadoop.io.ElasticByteBufferPool;
+import org.apache.hadoop.ozone.OzoneConsts;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactory;
+import org.apache.hadoop.ozone.client.io.BlockInputStreamFactoryImpl;
+import org.apache.hadoop.ozone.client.io.ECBlockInputStreamProxy;
+import org.apache.hadoop.ozone.client.io.ECBlockReconstructedStripeInputStream;
+import org.apache.hadoop.ozone.container.common.helpers.BlockData;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+/**
+ * The Coordinator implements the main flow of reconstructing
+ * missing container replicas.
+ * <p>
+ * For a container reconstruction task, the main flow is:
+ * - ListBlock from all healthy replicas
+ * - calculate effective block group len for all blocks
+ * - for each block
+ * - build a ReconstructInputStream to read healthy chunks
+ * - build a ECBlockOutputStream to write out decoded chunks
+ * - for each stripe
+ * - use ReconstructInputStream.readStripe to decode missing chunks
+ * - use ECBlockOutputStream.write to write decoded chunks to TargetDNs
+ * - PutBlock
+ * - CloseContainer
+ */
+public class ECReconstructionCoordinator implements Closeable {
+
+ static final Logger LOG =
+ LoggerFactory.getLogger(ECReconstructionCoordinator.class);
+
+ private static final int EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE = 3;
+
+ private final ECContainerOperationClient containerOperationClient;
+
+ private final ConfigurationSource config;
+
+ private final ByteBufferPool byteBufferPool;
+
+ private ExecutorService ecReconstructExecutor;
+
+ private BlockInputStreamFactory blockInputStreamFactory;
+
+ public ECReconstructionCoordinator(ECContainerOperationClient containerClient,
+ ConfigurationSource conf, ByteBufferPool byteBufferPool,
+ ExecutorService reconstructExecutor,
+ BlockInputStreamFactory streamFactory) {
+ this.containerOperationClient = containerClient;
+ this.config = conf;
+ this.byteBufferPool = byteBufferPool;
+ this.blockInputStreamFactory = streamFactory;
+ this.ecReconstructExecutor = reconstructExecutor;
+ }
+
+ public ECReconstructionCoordinator(ConfigurationSource conf,
+ CertificateClient certificateClient) throws IOException {
+ this(new ECContainerOperationClient(conf, certificateClient), conf,
+ new ElasticByteBufferPool(), null, null);
+ this.ecReconstructExecutor =
+ new ThreadPoolExecutor(EC_RECONSTRUCT_STRIPE_READ_POOL_MIN_SIZE,
+ config.getObject(OzoneClientConfig.class)
+ .getEcReconstructStripeReadPoolLimit(), 60, TimeUnit.SECONDS,
+ new SynchronousQueue<>(), new ThreadFactoryBuilder()
+ .setNameFormat("ec-reconstruct-reader-TID-%d").build(),
+ new ThreadPoolExecutor.CallerRunsPolicy());
+ this.blockInputStreamFactory = BlockInputStreamFactoryImpl
+ .getInstance(byteBufferPool, () -> ecReconstructExecutor);
+ }
+
+ public void reconstructECContainerGroup(long containerID,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> sourceNodeMap,
+ SortedMap<Integer, DatanodeDetails> targetNodeMap) throws IOException {
+
+ Pipeline pipeline = rebuildInputPipeline(repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockData[]> blockDataMap =
+ getBlockDataMap(containerID, repConfig, sourceNodeMap);
+
+ SortedMap<Long, BlockLocationInfo> blockLocationInfoMap =
+ calcBlockLocationInfoMap(containerID, blockDataMap, pipeline);
+
+ // 1. create target recovering containers.
+ Set<Map.Entry<Integer, DatanodeDetails>> targetIndexDns =
+ targetNodeMap.entrySet();
+ Iterator<Map.Entry<Integer, DatanodeDetails>> iterator =
+ targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ Map.Entry<Integer, DatanodeDetails> indexDnPair = iterator.next();
+ this.containerOperationClient
+ .createRecoveringContainer(containerID, indexDnPair.getValue(),
+ repConfig, null, indexDnPair.getKey());
+ }
+
+ // 2. Reconstruct and transfer to targets
+ for (BlockLocationInfo blockLocationInfo : blockLocationInfoMap.values()) {
+ reconstructECBlockGroup(blockLocationInfo, repConfig, targetNodeMap);
+ }
+
+ // 3. Close containers
+ iterator = targetIndexDns.iterator();
+ while (iterator.hasNext()) {
+ DatanodeDetails dn = iterator.next().getValue();
+ this.containerOperationClient
+ .closeContainer(containerID, dn, repConfig, null);
+ }
+
+ }
+
+ void reconstructECBlockGroup(BlockLocationInfo blockLocationInfo,
+ ECReplicationConfig repConfig,
+ SortedMap<Integer, DatanodeDetails> targetMap)
+ throws IOException {
+ long safeBlockGroupLength = blockLocationInfo.getLength();
+ List<Integer> missingContainerIndexes =
+ targetMap.keySet().stream().collect(Collectors.toList());
+
+ // calculate the real missing block indexes
+ int dataLocs = ECBlockInputStreamProxy
+ .expectedDataLocations(repConfig, safeBlockGroupLength);
+ List<Integer> toReconstructIndexes = new ArrayList<>();
+ for (int i = 0; i < missingContainerIndexes.size(); i++) {
+ Integer index = missingContainerIndexes.get(i);
+ if (index <= dataLocs || index > repConfig.getData()) {
+ toReconstructIndexes.add(index);
+ }
+ // else padded indexes.
+ }
+
+ // Looks like we don't need to reconstruct any missing blocks in this block
+ // group. The reason for this should be block group had only padding blocks
+ // in the missing locations.
+ if (toReconstructIndexes.size() == 0) {
+ if (LOG.isDebugEnabled()) {
+ LOG.debug("Skipping the reconstruction for the block: "
+ + blockLocationInfo.getBlockID() + ". In the missing locations: "
+ + missingContainerIndexes
+ + ", this block group has only padded blocks.");
+ }
+ return;
+ }
+
+ try (ECBlockReconstructedStripeInputStream sis
+ = new ECBlockReconstructedStripeInputStream(
+ repConfig, blockLocationInfo, true,
+ this.containerOperationClient.getXceiverClientManager(), null,
+ this.blockInputStreamFactory, byteBufferPool,
+ this.ecReconstructExecutor)) {
+
+ ECBlockOutputStream[] targetBlockStreams =
+ new ECBlockOutputStream[toReconstructIndexes.size()];
+ ByteBuffer[] bufs = new ByteBuffer[toReconstructIndexes.size()];
+ for (int i = 0; i < toReconstructIndexes.size(); i++) {
+ OzoneClientConfig configuration = new OzoneClientConfig();
+ // TODO: Let's avoid unnecessary bufferPool creation for
+ BufferPool bufferPool =
+ new BufferPool(configuration.getStreamBufferSize(),
+ (int) (configuration.getStreamBufferMaxSize() / configuration
+ .getStreamBufferSize()),
+ ByteStringConversion.createByteBufferConversion(false));
+ targetBlockStreams[i] =
+ new ECBlockOutputStream(blockLocationInfo.getBlockID(),
+ this.containerOperationClient.getXceiverClientManager(),
+ Pipeline.newBuilder().setId(PipelineID.valueOf(
+ targetMap.get(toReconstructIndexes.get(i)).getUuid()))
+ .setReplicationConfig(repConfig).setNodes(ImmutableList
+ .of(targetMap.get(toReconstructIndexes.get(i))))
+ .setState(Pipeline.PipelineState.CLOSED).build(),
+ bufferPool, configuration, blockLocationInfo.getToken());
+ bufs[i] = byteBufferPool.getBuffer(false, repConfig.getEcChunkSize());
+ // Make sure it's clean. Don't want to reuse the erroneously returned
+ // buffers from the pool.
+ bufs[i].clear();
+ }
+
+ sis.setRecoveryIndexes(toReconstructIndexes.stream().map(i -> (i - 1))
+ .collect(Collectors.toSet()));
+ long length = safeBlockGroupLength;
+ while (length > 0) {
+ int readLen = sis.recoverChunks(bufs);
+ // TODO: can be submitted in parallel
+ for (int i = 0; i < bufs.length; i++) {
+ targetBlockStreams[i].write(bufs[i]);
+ if (isFailed(targetBlockStreams[i],
+ targetBlockStreams[i].getCurrentChunkResponseFuture())) {
+ // If one chunk response failed, we should retry.
+ // Even after retries if it failed, we should declare the
+ // reconstruction as failed.
+ // For now, let's throw the exception.
+ throw new IOException(
+ "Chunk write failed at the new target node: "
+ + targetBlockStreams[i].getDatanodeDetails()
+ + ". Aborting the reconstruction process.");
+ }
Review Comment:
Nit: block can be extracted to method.
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