nowinkeyy commented on code in PR #5887:
URL: https://github.com/apache/rocketmq/pull/5887#discussion_r1104366365
##########
store/src/main/java/org/apache/rocketmq/store/DefaultMessageStore.java:
##########
@@ -2743,6 +2835,291 @@ public String getServiceName() {
}
+ class MainBatchDispatchRequestService extends ServiceThread {
+
+ private final ExecutorService batchDispatchRequestExecutor;
+
+ public MainBatchDispatchRequestService() {
+ batchDispatchRequestExecutor = new ThreadPoolExecutor(
+
DefaultMessageStore.this.getBrokerConfig().getBatchDispatchRequestThreadPoolNums(),
+
DefaultMessageStore.this.getBrokerConfig().getBatchDispatchRequestThreadPoolNums(),
+ 1000 * 60,
+ TimeUnit.MICROSECONDS,
+ new LinkedBlockingQueue<>(4096),
+ new
ThreadFactoryImpl("BatchDispatchRequestServiceThread_"),
+ new ThreadPoolExecutor.AbortPolicy());
+ }
+
+ private void pollBatchDispatchRequest() {
+ try {
+ if (!batchDispatchRequestQueue.isEmpty()) {
+ BatchDispatchRequest task =
batchDispatchRequestQueue.peek();
+ batchDispatchRequestExecutor.execute(() -> {
+ try {
+ ByteBuffer tmpByteBuffer =
task.byteBuffer.duplicate();
+ tmpByteBuffer.position(task.position);
+ tmpByteBuffer.limit(task.position + task.size);
+ List<DispatchRequest> dispatchRequestList = new
ArrayList<>();
+ while (tmpByteBuffer.hasRemaining()) {
+ DispatchRequest dispatchRequest =
DefaultMessageStore.this.commitLog.checkMessageAndReturnSize(tmpByteBuffer,
false, false, false);
+ if (dispatchRequest.isSuccess()) {
+ dispatchRequestList.add(dispatchRequest);
+ } else {
+ LOGGER.error("[BUG]read total count not
equals msg total size.");
+ }
+ }
+ dispatchRequestOrderlyQueue.put(task.id,
dispatchRequestList.toArray(new DispatchRequest[dispatchRequestList.size()]));
+ mappedPageHoldCount.getAndDecrement();
+ } catch (Exception e) {
+ LOGGER.error("There is an exception in task
execution.", e);
+ }
+ });
+ batchDispatchRequestQueue.poll();
+ }
+ } catch (Exception e) {
+ DefaultMessageStore.LOGGER.warn(this.getServiceName() + "
service has exception. ", e);
+ }
+ }
+
+ @Override
+ public void run() {
+ DefaultMessageStore.LOGGER.info(this.getServiceName() + " service
started");
+
+ while (!this.isStopped()) {
+ try {
+ TimeUnit.MILLISECONDS.sleep(1);
+ pollBatchDispatchRequest();
+ } catch (Exception e) {
+ DefaultMessageStore.LOGGER.warn(this.getServiceName() + "
service has exception. ", e);
+ }
+ }
+
+ DefaultMessageStore.LOGGER.info(this.getServiceName() + " service
end");
+ }
+
+ @Override
+ public String getServiceName() {
+ if
(DefaultMessageStore.this.getBrokerConfig().isInBrokerContainer()) {
+ return
DefaultMessageStore.this.getBrokerIdentity().getIdentifier() +
MainBatchDispatchRequestService.class.getSimpleName();
+ }
+ return MainBatchDispatchRequestService.class.getSimpleName();
+ }
+
+ }
+
+ class DispatchService extends ServiceThread {
+
+ private final List<DispatchRequest[]> dispatchRequestsList = new
ArrayList<>();
+
+ private void dispatch() {
+ dispatchRequestsList.clear();
+ dispatchRequestOrderlyQueue.get(dispatchRequestsList);
+ if (!dispatchRequestsList.isEmpty()) {
+ for (DispatchRequest[] dispatchRequests :
dispatchRequestsList) {
+ for (DispatchRequest dispatchRequest : dispatchRequests) {
+ DefaultMessageStore.this.doDispatch(dispatchRequest);
+ // wake up long-polling
+ if
(DefaultMessageStore.this.brokerConfig.isLongPollingEnable()
+ &&
DefaultMessageStore.this.messageArrivingListener != null) {
+
DefaultMessageStore.this.messageArrivingListener.arriving(dispatchRequest.getTopic(),
+ dispatchRequest.getQueueId(),
dispatchRequest.getConsumeQueueOffset() + 1,
+ dispatchRequest.getTagsCode(),
dispatchRequest.getStoreTimestamp(),
+ dispatchRequest.getBitMap(),
dispatchRequest.getPropertiesMap());
+
DefaultMessageStore.this.reputMessageService.notifyMessageArrive4MultiQueue(dispatchRequest);
+ }
+ if
(!DefaultMessageStore.this.getMessageStoreConfig().isDuplicationEnable() &&
+
DefaultMessageStore.this.getMessageStoreConfig().getBrokerRole() ==
BrokerRole.SLAVE) {
+ DefaultMessageStore.this.storeStatsService
+
.getSinglePutMessageTopicTimesTotal(dispatchRequest.getTopic()).add(1);
+ DefaultMessageStore.this.storeStatsService
+
.getSinglePutMessageTopicSizeTotal(dispatchRequest.getTopic())
+ .add(dispatchRequest.getMsgSize());
+ }
+ }
+ }
+ }
+ }
+
+ @Override
+ public void run() {
+ DefaultMessageStore.LOGGER.info(this.getServiceName() + " service
started");
+
+ while (!this.isStopped()) {
+ try {
+ TimeUnit.MILLISECONDS.sleep(1);
+ dispatch();
+ } catch (Exception e) {
+ DefaultMessageStore.LOGGER.warn(this.getServiceName() + "
service has exception. ", e);
+ }
+ }
+
+ DefaultMessageStore.LOGGER.info(this.getServiceName() + " service
end");
+ }
+
+ @Override
+ public String getServiceName() {
+ if
(DefaultMessageStore.this.getBrokerConfig().isInBrokerContainer()) {
+ return
DefaultMessageStore.this.getBrokerIdentity().getIdentifier() +
DispatchService.class.getSimpleName();
+ }
+ return DispatchService.class.getSimpleName();
+ }
+ }
+
+ class ConcurrentReputMessageService extends ReputMessageService {
+
+ private static final int BATCH_SIZE = 1024 * 1024 * 4;
+
+ private long batchId = 0;
+
+ private MainBatchDispatchRequestService
mainBatchDispatchRequestService;
+
+ private DispatchService dispatchService;
+
+ public ConcurrentReputMessageService() {
+ super();
+ this.mainBatchDispatchRequestService = new
MainBatchDispatchRequestService();
+ this.dispatchService = new DispatchService();
+ }
+
+ public void createBatchDispatchRequest(ByteBuffer byteBuffer, int
position, int size) {
+ if (position < 0) {
+ return;
+ }
+ mappedPageHoldCount.getAndIncrement();
+ BatchDispatchRequest task = new BatchDispatchRequest(byteBuffer,
position, size, batchId++);
+ batchDispatchRequestQueue.offer(task);
+ }
+
+ @Override
+ public void start() {
+ super.start();
+ this.mainBatchDispatchRequestService.start();
+ this.dispatchService.start();
+ }
+
+ @Override
+ public void doReput() {
+ if (this.reputFromOffset <
DefaultMessageStore.this.commitLog.getMinOffset()) {
+ LOGGER.warn("The reputFromOffset={} is smaller than
minPyOffset={}, this usually indicate that the dispatch behind too much and the
commitlog has expired.",
+ this.reputFromOffset,
DefaultMessageStore.this.commitLog.getMinOffset());
+ this.reputFromOffset =
DefaultMessageStore.this.commitLog.getMinOffset();
+ }
+ for (boolean doNext = true; this.isCommitLogAvailable() && doNext;
) {
+
+ SelectMappedBufferResult result =
DefaultMessageStore.this.commitLog.getData(reputFromOffset);
+
+ if (result == null) {
+ break;
+ }
+
+ int batchDispatchRequestStart = -1;
+ int batchDispatchRequestSize = -1;
+ try {
+ this.reputFromOffset = result.getStartOffset();
+
+ for (int readSize = 0; readSize < result.getSize() &&
reputFromOffset < DefaultMessageStore.this.getConfirmOffset() && doNext; ) {
+ ByteBuffer byteBuffer = result.getByteBuffer();
+
+ int totalSize =
preCheckMessageAndReturnSize(byteBuffer);
+
+ if (totalSize > 0) {
+ if (batchDispatchRequestStart == -1) {
+ batchDispatchRequestStart =
byteBuffer.position();
+ batchDispatchRequestSize = 0;
+ }
+ batchDispatchRequestSize += totalSize;
+ if (batchDispatchRequestSize > BATCH_SIZE) {
Review Comment:
What you said is right. But we don't want to expose BATCH_SIZE right now. It
doesn't make much sense to debug this parameter right now because it's not the
bottleneck. If this parameter is set too small, problems may occur. (If you
have any more reasons, please let me know and I will make changes.)
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