HDDS-179. CloseContainer/PutKey command should be syncronized with write operations. Contributed by Shashikant Banerjee.
This commit is contained in:
Mukul Kumar Singh
parent
0e832e7a74
commit
5ef29087ad
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@ -18,6 +18,7 @@
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package org.apache.hadoop.ozone.container.common.transport.server.ratis;
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import com.google.common.annotations.VisibleForTesting;
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import com.google.common.base.Preconditions;
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import org.apache.hadoop.hdds.HddsUtils;
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import org.apache.ratis.protocol.RaftGroupId;
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@ -52,6 +53,9 @@ import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ThreadPoolExecutor;
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@ -95,6 +99,13 @@ import java.util.concurrent.ThreadPoolExecutor;
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* {@link #applyTransaction} need to be enforced in the StateMachine
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* implementation. For example, synchronization between writeChunk and
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* createContainer in {@link ContainerStateMachine}.
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*
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* PutKey is synchronized with WriteChunk operations, PutKey for a block is
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* executed only after all the WriteChunk preceding the PutKey have finished.
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*
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* CloseContainer is synchronized with WriteChunk and PutKey operations,
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* CloseContainer for a container is processed after all the preceding write
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* operations for the container have finished.
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* */
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public class ContainerStateMachine extends BaseStateMachine {
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static final Logger LOG = LoggerFactory.getLogger(
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@ -105,15 +116,14 @@ public class ContainerStateMachine extends BaseStateMachine {
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private ThreadPoolExecutor chunkExecutor;
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private final ConcurrentHashMap<Long, CompletableFuture<Message>>
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writeChunkFutureMap;
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private final ConcurrentHashMap<Long, CompletableFuture<Message>>
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createContainerFutureMap;
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private final ConcurrentHashMap<Long, StateMachineHelper> stateMachineMap;
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ContainerStateMachine(ContainerDispatcher dispatcher,
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public ContainerStateMachine(ContainerDispatcher dispatcher,
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ThreadPoolExecutor chunkExecutor) {
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this.dispatcher = dispatcher;
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this.chunkExecutor = chunkExecutor;
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this.writeChunkFutureMap = new ConcurrentHashMap<>();
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this.createContainerFutureMap = new ConcurrentHashMap<>();
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this.stateMachineMap = new ConcurrentHashMap<>();
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}
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@Override
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@ -203,32 +213,6 @@ public class ContainerStateMachine extends BaseStateMachine {
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return dispatchCommand(requestProto)::toByteString;
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}
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private CompletableFuture<Message> handleWriteChunk(
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ContainerCommandRequestProto requestProto, long entryIndex) {
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final WriteChunkRequestProto write = requestProto.getWriteChunk();
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long containerID = write.getBlockID().getContainerID();
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CompletableFuture<Message> future =
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createContainerFutureMap.get(containerID);
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CompletableFuture<Message> writeChunkFuture;
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if (future != null) {
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writeChunkFuture = future.thenApplyAsync(
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v -> runCommand(requestProto), chunkExecutor);
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} else {
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writeChunkFuture = CompletableFuture.supplyAsync(
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() -> runCommand(requestProto), chunkExecutor);
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}
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writeChunkFutureMap.put(entryIndex, writeChunkFuture);
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return writeChunkFuture;
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}
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private CompletableFuture<Message> handleCreateContainer(
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ContainerCommandRequestProto requestProto) {
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long containerID = requestProto.getContainerID();
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createContainerFutureMap.
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computeIfAbsent(containerID, k -> new CompletableFuture<>());
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return CompletableFuture.completedFuture(() -> ByteString.EMPTY);
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}
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/*
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* writeStateMachineData calls are not synchronized with each other
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* and also with applyTransaction.
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@ -239,15 +223,17 @@ public class ContainerStateMachine extends BaseStateMachine {
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final ContainerCommandRequestProto requestProto =
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getRequestProto(entry.getSmLogEntry().getStateMachineData());
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Type cmdType = requestProto.getCmdType();
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switch (cmdType) {
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case CreateContainer:
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return handleCreateContainer(requestProto);
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case WriteChunk:
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return handleWriteChunk(requestProto, entry.getIndex());
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default:
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throw new IllegalStateException("Cmd Type:" + cmdType
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+ " should not have state machine data");
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long containerId = requestProto.getContainerID();
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stateMachineMap
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.computeIfAbsent(containerId, k -> new StateMachineHelper());
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CompletableFuture<Message> stateMachineFuture =
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stateMachineMap.get(containerId)
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.handleStateMachineData(requestProto, entry.getIndex());
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if (stateMachineFuture == null) {
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throw new IllegalStateException(
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"Cmd Type:" + cmdType + " should not have state machine data");
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}
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return stateMachineFuture;
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} catch (IOException e) {
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return completeExceptionally(e);
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}
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@ -363,25 +349,13 @@ public class ContainerStateMachine extends BaseStateMachine {
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try {
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ContainerCommandRequestProto requestProto =
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getRequestProto(trx.getSMLogEntry().getData());
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Type cmdType = requestProto.getCmdType();
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if (cmdType == Type.WriteChunk) {
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WriteChunkRequestProto write = requestProto.getWriteChunk();
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// the data field has already been removed in start Transaction
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Preconditions.checkArgument(!write.hasData());
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CompletableFuture<Message> stateMachineFuture =
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writeChunkFutureMap.remove(trx.getLogEntry().getIndex());
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return stateMachineFuture
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.thenComposeAsync(v ->
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CompletableFuture.completedFuture(runCommand(requestProto)));
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} else {
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Message message = runCommand(requestProto);
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if (cmdType == Type.CreateContainer) {
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long containerID = requestProto.getContainerID();
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createContainerFutureMap.remove(containerID).complete(message);
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}
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return CompletableFuture.completedFuture(message);
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}
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Preconditions.checkState(!HddsUtils.isReadOnly(requestProto));
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stateMachineMap.computeIfAbsent(requestProto.getContainerID(),
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k -> new StateMachineHelper());
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long index =
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trx.getLogEntry() == null ? -1 : trx.getLogEntry().getIndex();
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return stateMachineMap.get(requestProto.getContainerID())
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.executeContainerCommand(requestProto, index);
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} catch (IOException e) {
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return completeExceptionally(e);
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}
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@ -396,4 +370,239 @@ public class ContainerStateMachine extends BaseStateMachine {
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@Override
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public void close() throws IOException {
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}
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/**
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* Class to manage the future tasks for writeChunks.
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*/
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static class CommitChunkFutureMap {
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private final ConcurrentHashMap<Long, CompletableFuture<Message>>
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block2ChunkMap = new ConcurrentHashMap<>();
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synchronized int removeAndGetSize(long index) {
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block2ChunkMap.remove(index);
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return block2ChunkMap.size();
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}
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synchronized CompletableFuture<Message> add(long index,
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CompletableFuture<Message> future) {
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return block2ChunkMap.put(index, future);
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}
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synchronized List<CompletableFuture<Message>> getAll() {
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return new ArrayList<>(block2ChunkMap.values());
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}
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}
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/**
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* This class maintains maps and provide utilities to enforce synchronization
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* among createContainer, writeChunk, putKey and closeContainer.
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*/
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private class StateMachineHelper {
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private CompletableFuture<Message> createContainerFuture;
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// Map for maintaining all writeChunk futures mapped to blockId
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private final ConcurrentHashMap<Long, CommitChunkFutureMap>
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block2ChunkMap;
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// Map for putKey futures
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private final ConcurrentHashMap<Long, CompletableFuture<Message>>
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blockCommitMap;
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StateMachineHelper() {
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createContainerFuture = null;
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block2ChunkMap = new ConcurrentHashMap<>();
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blockCommitMap = new ConcurrentHashMap<>();
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}
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// The following section handles writeStateMachineData transactions
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// on a container
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// enqueue the create container future during writeStateMachineData
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// so that the write stateMachine data phase of writeChunk wait on
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// create container to finish.
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private CompletableFuture<Message> handleCreateContainer() {
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createContainerFuture = new CompletableFuture<>();
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return CompletableFuture.completedFuture(() -> ByteString.EMPTY);
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}
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// This synchronizes on create container to finish
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private CompletableFuture<Message> handleWriteChunk(
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ContainerCommandRequestProto requestProto, long entryIndex) {
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CompletableFuture<Message> containerOpFuture;
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if (createContainerFuture != null) {
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containerOpFuture = createContainerFuture
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.thenApplyAsync(v -> runCommand(requestProto), chunkExecutor);
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} else {
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containerOpFuture = CompletableFuture
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.supplyAsync(() -> runCommand(requestProto), chunkExecutor);
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}
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writeChunkFutureMap.put(entryIndex, containerOpFuture);
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return containerOpFuture;
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}
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CompletableFuture<Message> handleStateMachineData(
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final ContainerCommandRequestProto requestProto, long index) {
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Type cmdType = requestProto.getCmdType();
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if (cmdType == Type.CreateContainer) {
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return handleCreateContainer();
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} else if (cmdType == Type.WriteChunk) {
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return handleWriteChunk(requestProto, index);
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} else {
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return null;
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}
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}
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// The following section handles applyTransaction transactions
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// on a container
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private CompletableFuture<Message> handlePutKey(
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ContainerCommandRequestProto requestProto) {
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List<CompletableFuture<Message>> futureList = new ArrayList<>();
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long localId =
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requestProto.getPutKey().getKeyData().getBlockID().getLocalID();
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// Need not wait for create container future here as it has already
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// finished.
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if (block2ChunkMap.get(localId) != null) {
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futureList.addAll(block2ChunkMap.get(localId).getAll());
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}
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CompletableFuture<Message> effectiveFuture =
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runCommandAfterFutures(futureList, requestProto);
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CompletableFuture<Message> putKeyFuture =
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effectiveFuture.thenApply(message -> {
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blockCommitMap.remove(localId);
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return message;
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});
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blockCommitMap.put(localId, putKeyFuture);
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return putKeyFuture;
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}
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// Close Container should be executed only if all pending WriteType
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// container cmds get executed. Transactions which can return a future
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// are WriteChunk and PutKey.
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private CompletableFuture<Message> handleCloseContainer(
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ContainerCommandRequestProto requestProto) {
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List<CompletableFuture<Message>> futureList = new ArrayList<>();
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// No need to wait for create container future here as it should have
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// already finished.
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block2ChunkMap.values().forEach(b -> futureList.addAll(b.getAll()));
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futureList.addAll(blockCommitMap.values());
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// There are pending write Chunk/PutKey type requests
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// Queue this closeContainer request behind all these requests
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CompletableFuture<Message> closeContainerFuture =
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runCommandAfterFutures(futureList, requestProto);
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return closeContainerFuture.thenApply(message -> {
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stateMachineMap.remove(requestProto.getContainerID());
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return message;
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});
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}
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private CompletableFuture<Message> handleChunkCommit(
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ContainerCommandRequestProto requestProto, long index) {
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WriteChunkRequestProto write = requestProto.getWriteChunk();
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// the data field has already been removed in start Transaction
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Preconditions.checkArgument(!write.hasData());
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CompletableFuture<Message> stateMachineFuture =
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writeChunkFutureMap.remove(index);
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CompletableFuture<Message> commitChunkFuture = stateMachineFuture
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.thenComposeAsync(v -> CompletableFuture
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.completedFuture(runCommand(requestProto)));
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long localId = requestProto.getWriteChunk().getBlockID().getLocalID();
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// Put the applyTransaction Future again to the Map.
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// closeContainer should synchronize with this.
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block2ChunkMap
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.computeIfAbsent(localId, id -> new CommitChunkFutureMap())
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.add(index, commitChunkFuture);
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return commitChunkFuture.thenApply(message -> {
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block2ChunkMap.computeIfPresent(localId, (containerId, chunks)
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-> chunks.removeAndGetSize(index) == 0? null: chunks);
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return message;
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});
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}
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private CompletableFuture<Message> runCommandAfterFutures(
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List<CompletableFuture<Message>> futureList,
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ContainerCommandRequestProto requestProto) {
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CompletableFuture<Message> effectiveFuture;
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if (futureList.isEmpty()) {
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effectiveFuture = CompletableFuture
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.supplyAsync(() -> runCommand(requestProto));
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} else {
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CompletableFuture<Void> allFuture = CompletableFuture.allOf(
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futureList.toArray(new CompletableFuture[futureList.size()]));
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effectiveFuture = allFuture
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.thenApplyAsync(v -> runCommand(requestProto));
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}
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return effectiveFuture;
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}
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CompletableFuture<Message> handleCreateContainer(
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ContainerCommandRequestProto requestProto) {
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CompletableFuture<Message> future =
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CompletableFuture.completedFuture(runCommand(requestProto));
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future.thenAccept(m -> {
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createContainerFuture.complete(m);
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createContainerFuture = null;
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});
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return future;
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}
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CompletableFuture<Message> handleOtherCommands(
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ContainerCommandRequestProto requestProto) {
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return CompletableFuture.completedFuture(runCommand(requestProto));
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}
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CompletableFuture<Message> executeContainerCommand(
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ContainerCommandRequestProto requestProto, long index) {
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Type cmdType = requestProto.getCmdType();
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switch (cmdType) {
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case WriteChunk:
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return handleChunkCommit(requestProto, index);
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case CloseContainer:
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return handleCloseContainer(requestProto);
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case PutKey:
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return handlePutKey(requestProto);
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case CreateContainer:
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return handleCreateContainer(requestProto);
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default:
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return handleOtherCommands(requestProto);
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}
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}
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}
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@VisibleForTesting
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public ConcurrentHashMap<Long, StateMachineHelper> getStateMachineMap() {
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return stateMachineMap;
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}
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@VisibleForTesting
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public CompletableFuture<Message> getCreateContainerFuture(long containerId) {
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StateMachineHelper helper = stateMachineMap.get(containerId);
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return helper == null ? null : helper.createContainerFuture;
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}
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@VisibleForTesting
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public List<CompletableFuture<Message>> getCommitChunkFutureMap(
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long containerId) {
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StateMachineHelper helper = stateMachineMap.get(containerId);
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if (helper != null) {
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List<CompletableFuture<Message>> futureList = new ArrayList<>();
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stateMachineMap.get(containerId).block2ChunkMap.values()
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.forEach(b -> futureList.addAll(b.getAll()));
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return futureList;
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}
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return null;
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}
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@VisibleForTesting
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public Collection<CompletableFuture<Message>> getWriteChunkFutureMap() {
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return writeChunkFutureMap.values();
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}
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}
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@ -0,0 +1,201 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.ozone.container.server;
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import org.apache.hadoop.hdds.client.BlockID;
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import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos
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.ContainerCommandResponseProto;
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import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos
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.ContainerCommandRequestProto;
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import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos
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.ContainerType;
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import org.apache.hadoop.hdds.scm.container.common.helpers.Pipeline;
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import org.apache.hadoop.ozone.container.ContainerTestHelper;
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import org.apache.hadoop.ozone.container.common.interfaces.ContainerDispatcher;
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import org.apache.hadoop.ozone.container.common.interfaces.Handler;
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import org.apache.hadoop.ozone.container.common.transport.server.ratis
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.ContainerStateMachine;
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import org.apache.ratis.RatisHelper;
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import org.apache.ratis.protocol.ClientId;
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import org.apache.ratis.protocol.Message;
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import org.apache.ratis.protocol.RaftClientRequest;
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import org.apache.ratis.shaded.proto.RaftProtos;
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import org.apache.ratis.statemachine.TransactionContext;
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import org.apache.ratis.util.ProtoUtils;
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import org.junit.Assert;
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import org.junit.Test;
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import java.io.IOException;
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import java.util.Collections;
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import java.util.Random;
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import java.util.concurrent.ThreadPoolExecutor;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.ArrayBlockingQueue;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.atomic.AtomicLong;
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/**
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* This class tests ContainerStateMachine.
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*/
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public class TestContainerStateMachine {
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private static final AtomicLong CALL_ID_COUNTER = new AtomicLong();
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private static long nextCallId() {
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return CALL_ID_COUNTER.getAndIncrement() & Long.MAX_VALUE;
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}
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private ThreadPoolExecutor executor =
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new ThreadPoolExecutor(4, 4, 100, TimeUnit.SECONDS,
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new ArrayBlockingQueue<>(1024),
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new ThreadPoolExecutor.CallerRunsPolicy());
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private ContainerStateMachine stateMachine =
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new ContainerStateMachine(new TestContainerDispatcher(), executor);
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@Test
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public void testCloseContainerSynchronization() throws Exception {
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Pipeline pipeline = ContainerTestHelper.createPipeline(3);
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long containerId = new Random().nextLong();
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//create container request
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RaftClientRequest createContainer = getRaftClientRequest(
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ContainerTestHelper.getCreateContainerRequest(containerId, pipeline));
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ContainerCommandRequestProto writeChunkProto = ContainerTestHelper
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||||
.getWriteChunkRequest(pipeline, new BlockID(containerId, nextCallId()),
|
||||
1024);
|
||||
|
||||
RaftClientRequest writeChunkRequest = getRaftClientRequest(writeChunkProto);
|
||||
|
||||
// add putKey request
|
||||
ContainerCommandRequestProto putKeyProto = ContainerTestHelper
|
||||
.getPutKeyRequest(pipeline, writeChunkProto.getWriteChunk());
|
||||
RaftClientRequest putKeyRequest = getRaftClientRequest(putKeyProto);
|
||||
|
||||
TransactionContext createContainerCtxt =
|
||||
startAndWriteStateMachineData(createContainer);
|
||||
// Start and Write into the StateMachine
|
||||
TransactionContext writeChunkcontext =
|
||||
startAndWriteStateMachineData(writeChunkRequest);
|
||||
|
||||
TransactionContext putKeyContext =
|
||||
stateMachine.startTransaction(putKeyRequest);
|
||||
Assert.assertEquals(1, stateMachine.getStateMachineMap().size());
|
||||
Assert.assertNotNull(stateMachine.getCreateContainerFuture(containerId));
|
||||
Assert.assertEquals(1,
|
||||
stateMachine.getWriteChunkFutureMap().size());
|
||||
Assert.assertTrue(
|
||||
stateMachine.getCommitChunkFutureMap(containerId).isEmpty());
|
||||
|
||||
//Add a closeContainerRequest
|
||||
RaftClientRequest closeRequest = getRaftClientRequest(
|
||||
ContainerTestHelper.getCloseContainer(pipeline, containerId));
|
||||
|
||||
TransactionContext closeCtx = stateMachine.startTransaction(closeRequest);
|
||||
|
||||
// Now apply all the transaction for the CreateContainer Command.
|
||||
// This will unblock writeChunks as well
|
||||
|
||||
stateMachine.applyTransaction(createContainerCtxt);
|
||||
stateMachine.applyTransaction(writeChunkcontext);
|
||||
CompletableFuture<Message> putKeyFuture =
|
||||
stateMachine.applyTransaction(putKeyContext);
|
||||
waitForTransactionCompletion(putKeyFuture);
|
||||
// Make sure the putKey transaction complete
|
||||
Assert.assertTrue(putKeyFuture.isDone());
|
||||
|
||||
// Execute the closeContainer. This should ensure all prior Write Type
|
||||
// container requests finish execution
|
||||
|
||||
CompletableFuture<Message> closeFuture =
|
||||
stateMachine.applyTransaction(closeCtx);
|
||||
waitForTransactionCompletion(closeFuture);
|
||||
// Make sure the closeContainer transaction complete
|
||||
Assert.assertTrue(closeFuture.isDone());
|
||||
Assert.assertNull(stateMachine.getCreateContainerFuture(containerId));
|
||||
Assert.assertNull(stateMachine.getCommitChunkFutureMap(containerId));
|
||||
|
||||
}
|
||||
|
||||
private RaftClientRequest getRaftClientRequest(
|
||||
ContainerCommandRequestProto req) throws IOException {
|
||||
ClientId clientId = ClientId.randomId();
|
||||
return new RaftClientRequest(clientId,
|
||||
RatisHelper.toRaftPeerId(ContainerTestHelper.createDatanodeDetails()),
|
||||
RatisHelper.emptyRaftGroup().getGroupId(), nextCallId(), 0,
|
||||
Message.valueOf(req.toByteString()), RaftClientRequest
|
||||
.writeRequestType(RaftProtos.ReplicationLevel.MAJORITY));
|
||||
}
|
||||
|
||||
private void waitForTransactionCompletion(
|
||||
CompletableFuture<Message> future) throws Exception {
|
||||
ExecutorService executorService = Executors.newSingleThreadExecutor();
|
||||
executorService
|
||||
.invokeAll(Collections.singleton(future::get), 10,
|
||||
TimeUnit.SECONDS); // Timeout of 10 minutes.
|
||||
executorService.shutdown();
|
||||
}
|
||||
|
||||
private TransactionContext startAndWriteStateMachineData(
|
||||
RaftClientRequest request) throws IOException {
|
||||
TransactionContext ctx = stateMachine.startTransaction(request);
|
||||
RaftProtos.LogEntryProto e = ProtoUtils
|
||||
.toLogEntryProto(ctx.getSMLogEntry(), request.getSeqNum(),
|
||||
request.getCallId(), ClientId.randomId(), request.getCallId());
|
||||
ctx.setLogEntry(e);
|
||||
stateMachine.writeStateMachineData(e);
|
||||
return ctx;
|
||||
}
|
||||
|
||||
// ContainerDispatcher for test only purpose.
|
||||
private static class TestContainerDispatcher implements ContainerDispatcher {
|
||||
/**
|
||||
* Dispatches commands to container layer.
|
||||
*
|
||||
* @param msg - Command Request
|
||||
* @return Command Response
|
||||
*/
|
||||
@Override
|
||||
public ContainerCommandResponseProto dispatch(
|
||||
ContainerCommandRequestProto msg) {
|
||||
return ContainerTestHelper.getCreateContainerResponse(msg);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void init() {
|
||||
}
|
||||
|
||||
@Override
|
||||
public void shutdown() {
|
||||
}
|
||||
|
||||
@Override
|
||||
public void setScmId(String scmId) {
|
||||
}
|
||||
|
||||
@Override
|
||||
public Handler getHandler(ContainerType containerType) {
|
||||
return null;
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue