6. consumer消费消息

6. consumer消费消息

测试代码

public static void main(String[] args) {
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("ProducerGroupName");
        consumer.setNamesrvAddr("127.0.0.1:9876");

        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);

        try {
            consumer.subscribe("TopicTest", "*");
        } catch (MQClientException e) {
            e.printStackTrace();
        }

        consumer.registerMessageListener(new MessageListenerConcurrently() {

            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List msgs,
                                                            ConsumeConcurrentlyContext context) {
                for (MessageExt ext : msgs) {
                    String result = new String(ext.getBody());
//                    Thread.sleep(10000);
                    System.out.println(result);
                }
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        }) ;

        try {
            consumer.start();
        } catch (MQClientException e) {
            e.printStackTrace();
        }

        System.out.printf("Consumer Started.%n");
    }

还是从start()入手分析

public void start() throws MQClientException {
        setConsumerGroup(NamespaceUtil.wrapNamespace(this.getNamespace(), this.consumerGroup));
        this.defaultMQPushConsumerImpl.start();
        if (null != traceDispatcher) {
            try {
                traceDispatcher.start(this.getNamesrvAddr(), this.getAccessChannel());
            } catch (MQClientException e) {
                log.warn("trace dispatcher start failed ", e);
            }
        }
    }

--

    public synchronized void start() throws MQClientException {
        switch (this.serviceState) {
            case CREATE_JUST:
                log.info("the consumer [{}] start beginning. messageModel={}, isUnitMode={}", this.defaultMQPushConsumer.getConsumerGroup(),
                    this.defaultMQPushConsumer.getMessageModel(), this.defaultMQPushConsumer.isUnitMode());
                this.serviceState = ServiceState.START_FAILED;

                this.checkConfig();

                this.copySubscription();

                if (this.defaultMQPushConsumer.getMessageModel() == MessageModel.CLUSTERING) {
                    this.defaultMQPushConsumer.changeInstanceNameToPID();
                }

                this.mQClientFactory = MQClientManager.getInstance().getOrCreateMQClientInstance(this.defaultMQPushConsumer, this.rpcHook);

                this.rebalanceImpl.setConsumerGroup(this.defaultMQPushConsumer.getConsumerGroup());
                this.rebalanceImpl.setMessageModel(this.defaultMQPushConsumer.getMessageModel());
                this.rebalanceImpl.setAllocateMessageQueueStrategy(this.defaultMQPushConsumer.getAllocateMessageQueueStrategy());
                this.rebalanceImpl.setmQClientFactory(this.mQClientFactory);

                this.pullAPIWrapper = new PullAPIWrapper(
                    mQClientFactory,
                    this.defaultMQPushConsumer.getConsumerGroup(), isUnitMode());
                this.pullAPIWrapper.registerFilterMessageHook(filterMessageHookList);

                if (this.defaultMQPushConsumer.getOffsetStore() != null) {
                    this.offsetStore = this.defaultMQPushConsumer.getOffsetStore();
                } else {
                    switch (this.defaultMQPushConsumer.getMessageModel()) {
                        case BROADCASTING:
                            this.offsetStore = new LocalFileOffsetStore(this.mQClientFactory, this.defaultMQPushConsumer.getConsumerGroup());
                            break;
                        case CLUSTERING:
                            this.offsetStore = new RemoteBrokerOffsetStore(this.mQClientFactory, this.defaultMQPushConsumer.getConsumerGroup());
                            break;
                        default:
                            break;
                    }
                    this.defaultMQPushConsumer.setOffsetStore(this.offsetStore);
                }
                this.offsetStore.load();

                if (this.getMessageListenerInner() instanceof MessageListenerOrderly) {
                    this.consumeOrderly = true;
                    this.consumeMessageService =
                        new ConsumeMessageOrderlyService(this, (MessageListenerOrderly) this.getMessageListenerInner());
                } else if (this.getMessageListenerInner() instanceof MessageListenerConcurrently) {
                    this.consumeOrderly = false;
                    this.consumeMessageService =
                        new ConsumeMessageConcurrentlyService(this, (MessageListenerConcurrently) this.getMessageListenerInner());
                }

                this.consumeMessageService.start();

                boolean registerOK = mQClientFactory.registerConsumer(this.defaultMQPushConsumer.getConsumerGroup(), this);
                if (!registerOK) {
                    this.serviceState = ServiceState.CREATE_JUST;
                    this.consumeMessageService.shutdown(defaultMQPushConsumer.getAwaitTerminationMillisWhenShutdown());
                    throw new MQClientException("The consumer group[" + this.defaultMQPushConsumer.getConsumerGroup()
                        + "] has been created before, specify another name please." + FAQUrl.suggestTodo(FAQUrl.GROUP_NAME_DUPLICATE_URL),
                        null);
                }

                mQClientFactory.start();
                log.info("the consumer [{}] start OK.", this.defaultMQPushConsumer.getConsumerGroup());
                this.serviceState = ServiceState.RUNNING;
                break;
            case RUNNING:
            case START_FAILED:
            case SHUTDOWN_ALREADY:
                throw new MQClientException("The PushConsumer service state not OK, maybe started once, "
                    + this.serviceState
                    + FAQUrl.suggestTodo(FAQUrl.CLIENT_SERVICE_NOT_OK),
                    null);
            default:
                break;
        }

        this.updateTopicSubscribeInfoWhenSubscriptionChanged();
        this.mQClientFactory.checkClientInBroker();
        this.mQClientFactory.sendHeartbeatToAllBrokerWithLock();
        this.mQClientFactory.rebalanceImmediately();
    }

--默认的是平均算法：AllocateMessageQueueAveragely

public List allocate(String consumerGroup, String currentCID, List mqAll,
        List cidAll) {
        if (currentCID == null || currentCID.length() < 1) {
            throw new IllegalArgumentException("currentCID is empty");
        }
        if (mqAll == null || mqAll.isEmpty()) {
            throw new IllegalArgumentException("mqAll is null or mqAll empty");
        }
        if (cidAll == null || cidAll.isEmpty()) {
            throw new IllegalArgumentException("cidAll is null or cidAll empty");
        }

        List result = new ArrayList();
        // 消费组里面的client不包含当前client
        if (!cidAll.contains(currentCID)) {
            log.info("[BUG] ConsumerGroup: {} The consumerId: {} not in cidAll: {}",
                consumerGroup,
                currentCID,
                cidAll);
            return result;
        }

        int index = cidAll.indexOf(currentCID);
        // 计算messageQueue比消费者的数量多几个
        int mod = mqAll.size() % cidAll.size();
        // 如果队列的数量小于等于consumer的数量，分配1个
        // 如果余数大于0，index在余数mod之前的就要多分一个messageQueue
        // 比如6个messageQueue, 4个consumer，当前consumerIndex = 1
        //余数为2，第1个(index=0)和第2个(index=1)平均分配为2
        // averageSize代表的就是index之前的consumer,每个consuemr分配多少个messageQueue
        int averageSize =
            mqAll.size() <= cidAll.size() ? 1 : (mod > 0 && index < mod ? mqAll.size() / cidAll.size()
                + 1 : mqAll.size() / cidAll.size());
        //计算分配给当前consumer的messageQueue的范围
        int startIndex = (mod > 0 && index < mod) ? index * averageSize : index * averageSize + mod;
        int range = Math.min(averageSize, mqAll.size() - startIndex);
        for (int i = 0; i < range; i++) {
            result.add(mqAll.get((startIndex + i) % mqAll.size()));
        }
        return result;
    }

--

private void updateTopicSubscribeInfoWhenSubscriptionChanged() {
        Map subTable = this.getSubscriptionInner();
        if (subTable != null) {
            for (final Map.Entry entry : subTable.entrySet()) {
                final String topic = entry.getKey();
                this.mQClientFactory.updateTopicRouteInfoFromNameServer(topic);
            }
        }
    }

--

可以看到subscriptionInner不为空，这是就去nameSrv拉取topic的路由信息

拉取完topic信息之后，就开始消费了，但是呢，一个messageQueue只能被一个consuemr消费，一个consumer可以消费多个messageQueue所以，这里就需要先申请消费的messageQueue

this.mQClientFactory.rebalanceImmediately();

--

public void rebalanceImmediately() {
        this.rebalanceService.wakeup();
    }

--

public void wakeup() {
        if (hasNotified.compareAndSet(false, true)) {
            waitPoint.countDown(); // notify
        }
    }

这里waitPoint是Countdownlatch,这里countDown()，必定有地方在wait()

经过查找

在上面的start()方法中-->mQClientFactory.start();-->this.rebalanceService.start();

RebalanceService.start()

public void run() {
        log.info(this.getServiceName() + " service started");

        while (!this.isStopped()) {
            this.waitForRunning(waitInterval);
            this.mqClientFactory.doRebalance();
        }

        log.info(this.getServiceName() + " service end");
    }

会调用MQClientInstance.doRebalance()

public void doRebalance() {
        for (Map.Entry entry : this.consumerTable.entrySet()) {
            MQConsumerInner impl = entry.getValue();
            if (impl != null) {
                try {
                    impl.doRebalance();
                } catch (Throwable e) {
                    log.error("doRebalance exception", e);
                }
            }
        }
    }

默认的MQConsumerInner是DefaultMQPushConsumerImpl

DefaultMQPushConsumerImpl.doRebalance()

 public void doRebalance() {
        if (!this.pause) {
            this.rebalanceImpl.doRebalance(this.isConsumeOrderly());
        }
    }

这里rebalanceImpl是RebalanceImpl

    public void doRebalance(final boolean isOrder) {
        Map subTable = this.getSubscriptionInner();
        if (subTable != null) {
            for (final Map.Entry entry : subTable.entrySet()) {
                final String topic = entry.getKey();
                try {
                    this.rebalanceByTopic(topic, isOrder);
                } catch (Throwable e) {
                    if (!topic.startsWith(MixAll.RETRY_GROUP_TOPIC_PREFIX)) {
                        log.warn("rebalanceByTopic Exception", e);
                    }
                }
            }
        }

        this.truncateMessageQueueNotMyTopic();
    }

--

 private void rebalanceByTopic(final String topic, final boolean isOrder) {
        switch (messageModel) {
            case BROADCASTING: {
                ...
                break;
            }
            case CLUSTERING: {
                Set mqSet = this.topicSubscribeInfoTable.get(topic);
                // 拉取topic的消费者列表
                List cidAll = this.mQClientFactory.findConsumerIdList(topic, consumerGroup);
                if (null == mqSet) {
                    if (!topic.startsWith(MixAll.RETRY_GROUP_TOPIC_PREFIX)) {
                        log.warn("doRebalance, {}, but the topic[{}] not exist.", consumerGroup, topic);
                    }
                }

                if (null == cidAll) {
                    log.warn("doRebalance, {} {}, get consumer id list failed", consumerGroup, topic);
                }

                if (mqSet != null && cidAll != null) {
                    List mqAll = new ArrayList();
                    mqAll.addAll(mqSet);

                    Collections.sort(mqAll);
                    Collections.sort(cidAll);

                    // 根据messageQueue分配策略，分配消费的messageQueue
                    // 默认strategy是AllocateMessageQueueAveragely
                    AllocateMessageQueueStrategy strategy = this.allocateMessageQueueStrategy;

                    List allocateResult = null;
                    try {
                        allocateResult = strategy.allocate(
                            this.consumerGroup,
                            this.mQClientFactory.getClientId(),
                            mqAll,
                            cidAll);
                    } catch (Throwable e) {
                        log.error("AllocateMessageQueueStrategy.allocate Exception. allocateMessageQueueStrategyName={}", strategy.getName(),
                            e);
                        return;
                    }

                    Set allocateResultSet = new HashSet();
                    if (allocateResult != null) {
                        allocateResultSet.addAll(allocateResult);
                    }
                    // 判断messageQueue分配是否发生变更
                    boolean changed = this.updateProcessQueueTableInRebalance(topic, allocateResultSet, isOrder);
                    if (changed) {
                        log.info(
                            "rebalanced result changed. allocateMessageQueueStrategyName={}, group={}, topic={}, clientId={}, mqAllSize={}, cidAllSize={}, rebalanceResultSize={}, rebalanceResultSet={}",
                            strategy.getName(), consumerGroup, topic, this.mQClientFactory.getClientId(), mqSet.size(), cidAll.size(),
                            allocateResultSet.size(), allocateResultSet);
                        // 发生变更，开始处理
                        this.messageQueueChanged(topic, mqSet, allocateResultSet);
                    }
                }
                break;
            }
            default:
                break;
        }
    }

--

 private boolean updateProcessQueueTableInRebalance(final String topic, final Set mqSet,
        final boolean isOrder) {
        boolean changed = false;
        // 当前mq分配的messageQueue
        Iterator> it = this.processQueueTable.entrySet().iterator();
        while (it.hasNext()) {
            Entry next = it.next();
            MessageQueue mq = next.getKey();
            ProcessQueue pq = next.getValue();

            if (mq.getTopic().equals(topic)) {
                //新分配的messageQueue中，没有mq
                // 需要删除这个mq
                if (!mqSet.contains(mq)) {
                    pq.setDropped(true);
                    if (this.removeUnnecessaryMessageQueue(mq, pq)) {
                        it.remove();
                        changed = true;
                        log.info("doRebalance, {}, remove unnecessary mq, {}", consumerGroup, mq);
                    }
                }
                // processQueue达到了最大空闲时间
                else if (pq.isPullExpired()) {
                    // 根据消费者类型做相应的处理
                    // pull --> CONSUME_ACTIVELY
                    // push --> CONSUME_PASSIVELY
                    switch (this.consumeType()) {
                        case CONSUME_ACTIVELY:
                            break;
                        case CONSUME_PASSIVELY:
                            pq.setDropped(true);
                            if (this.removeUnnecessaryMessageQueue(mq, pq)) {
                                it.remove();
                                changed = true;
                                log.error("[BUG]doRebalance, {}, remove unnecessary mq, {}, because pull is pause, so try to fixed it",
                                    consumerGroup, mq);
                            }
                            break;
                        default:
                            break;
                    }
                }
            }
        }
        // 上面完成了之前已分配的messageQueue的删除
        // 下面接着处理新增的messageQueue
        List pullRequestList = new ArrayList();
        for (MessageQueue mq : mqSet) {
            if (!this.processQueueTable.containsKey(mq)) {
                // 顺序消费，但是锁定messageQueue失败
                // 这里在顺序消费里细讲
                if (isOrder && !this.lock(mq)) {
                    log.warn("doRebalance, {}, add a new mq failed, {}, because lock failed", consumerGroup, mq);
                    continue;
                }
                //从内存中删除这个消费队列的消费进度
                this.removeDirtyOffset(mq);
                ProcessQueue pq = new ProcessQueue();

                // 计算新messageQueue从哪里开始消费
                long nextOffset = -1L;
                try {
                    nextOffset = this.computePullFromWhereWithException(mq);
                } catch (Exception e) {
                    log.info("doRebalance, {}, compute offset failed, {}", consumerGroup, mq);
                    continue;
                }

                if (nextOffset >= 0) {
                    ProcessQueue pre = this.processQueueTable.putIfAbsent(mq, pq);
                    if (pre != null) {
                        log.info("doRebalance, {}, mq already exists, {}", consumerGroup, mq);
                    } else {
                        log.info("doRebalance, {}, add a new mq, {}", consumerGroup, mq);
                        PullRequest pullRequest = new PullRequest();
                        pullRequest.setConsumerGroup(consumerGroup);
                        pullRequest.setNextOffset(nextOffset);
                        pullRequest.setMessageQueue(mq);
                        pullRequest.setProcessQueue(pq);
                        pullRequestList.add(pullRequest);
                        changed = true;
                    }
                } else {
                    log.warn("doRebalance, {}, add new mq failed, {}", consumerGroup, mq);
                }
            }
        }
        //发送一个pullRequest
        this.dispatchPullRequest(pullRequestList);

        return changed;
    }

--

 public void dispatchPullRequest(List pullRequestList) {
        for (PullRequest pullRequest : pullRequestList) {
            this.defaultMQPushConsumerImpl.executePullRequestImmediately(pullRequest);
            log.info("doRebalance, {}, add a new pull request {}", consumerGroup, pullRequest);
        }
    }

--

public void executePullRequestImmediately(final PullRequest pullRequest) {
        this.mQClientFactory.getPullMessageService().executePullRequestImmediately(pullRequest);
    }

--

public void executePullRequestImmediately(final PullRequest pullRequest) {
        try {
            this.pullRequestQueue.put(pullRequest);
        } catch (InterruptedException e) {
            log.error("executePullRequestImmediately pullRequestQueue.put", e);
        }
    }

这里往pullRequestQueue里面put一个request

MQClientInstance.start()里面调用了pullMessageService.start()

这是PullMessageService.start() --> PullMessageService.run()

 public void run() {
        log.info(this.getServiceName() + " service started");

        while (!this.isStopped()) {
            try {
                PullRequest pullRequest = this.pullRequestQueue.take();
                this.pullMessage(pullRequest);
            } catch (InterruptedException ignored) {
            } catch (Exception e) {
                log.error("Pull Message Service Run Method exception", e);
            }
        }

        log.info(this.getServiceName() + " service end");
    }

--

  private void pullMessage(final PullRequest pullRequest) {
        final MQConsumerInner consumer = this.mQClientFactory.selectConsumer(pullRequest.getConsumerGroup());
        if (consumer != null) {
            DefaultMQPushConsumerImpl impl = (DefaultMQPushConsumerImpl) consumer;
            impl.pullMessage(pullRequest);
        } else {
            log.warn("No matched consumer for the PullRequest {}, drop it", pullRequest);
        }
    }

--DefaultMQPushConsumerImpl.pullMessage()

   public void pullMessage(final PullRequest pullRequest) {
        final ProcessQueue processQueue = pullRequest.getProcessQueue();
        // 省略部分代码
        ...
        try {
            this.pullAPIWrapper.pullKernelImpl(
                pullRequest.getMessageQueue(),
                subexpression,
                subscriptionData.getexpressionType(),
                subscriptionData.getSubVersion(),
                pullRequest.getNextOffset(),
                this.defaultMQPushConsumer.getPullBatchSize(),
                sysFlag,
                commitOffsetValue,
                BROKER_SUSPEND_MAX_TIME_MILLIS,
                CONSUMER_TIMEOUT_MILLIS_WHEN_SUSPEND,
                CommunicationMode.ASYNC,
                pullCallback
            );
        } catch (Exception e) {
            log.error("pullKernelImpl exception", e);
            this.executePullRequestLater(pullRequest, pullTimeDelayMillsWhenException);
        }
    }

--

PullAPIWrapper .pullKernelImpl()

    public PullResult pullKernelImpl(
        final MessageQueue mq,
        final String subexpression,
        final String expressionType,
        final long subVersion,
        final long offset,
        final int maxNums,
        final int sysFlag,
        final long commitOffset,
        final long brokerSuspendMaxTimeMillis,
        final long timeoutMillis,
        final CommunicationMode communicationMode,
        final PullCallback pullCallback
    ) throws MQClientException, RemotingException, MQBrokerException, InterruptedException {
        // 内存中找到broker的信息
        FindBrokerResult findBrokerResult =
            this.mQClientFactory.findBrokerAddressInSubscribe(mq.getBrokerName(),
                this.recalculatePullFromWhichNode(mq), false);
        if (null == findBrokerResult) {
            // 内存中，没有找到，去namesrv拉取topic信息
            this.mQClientFactory.updateTopicRouteInfoFromNameServer(mq.getTopic());
            findBrokerResult =
                this.mQClientFactory.findBrokerAddressInSubscribe(mq.getBrokerName(),
                    this.recalculatePullFromWhichNode(mq), false);
        }

        if (findBrokerResult != null) {
            {
                // check version
                if (!expressionType.isTagType(expressionType)
                    && findBrokerResult.getBrokerVersion() < MQVersion.Version.V4_1_0_SNAPSHOT.ordinal()) {
                    throw new MQClientException("The broker[" + mq.getBrokerName() + ", "
                        + findBrokerResult.getBrokerVersion() + "] does not upgrade to support for filter message by " + expressionType, null);
                }
            }
            int sysFlagInner = sysFlag;

            if (findBrokerResult.isSlave()) {
                sysFlagInner = PullSysFlag.clearCommitOffsetFlag(sysFlagInner);
            }

            PullMessageRequestHeader requestHeader = new PullMessageRequestHeader();
            // 构造requestHeader
            ...

            String brokerAddr = findBrokerResult.getBrokerAddr();
            if (PullSysFlag.hasClassFilterFlag(sysFlagInner)) {
                brokerAddr = computePullFromWhichFilterServer(mq.getTopic(), brokerAddr);
            }

            PullResult pullResult = this.mQClientFactory.getMQClientAPIImpl().pullMessage(
                brokerAddr,
                requestHeader,
                timeoutMillis,
                communicationMode,
                pullCallback);

            return pullResult;
        }

        throw new MQClientException("The broker[" + mq.getBrokerName() + "] not exist", null);
    }

--

    public PullResult pullMessage(
        final String addr,
        final PullMessageRequestHeader requestHeader,
        final long timeoutMillis,
        final CommunicationMode communicationMode,
        final PullCallback pullCallback
    ) throws RemotingException, MQBrokerException, InterruptedException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.PULL_MESSAGE, requestHeader);

        switch (communicationMode) {
            case ONEWAY:
                assert false;
                return null;
            case ASYNC:
                this.pullMessageAsync(addr, request, timeoutMillis, pullCallback);
                return null;
            case SYNC:
                return this.pullMessageSync(addr, request, timeoutMillis);
            default:
                assert false;
                break;
        }

        return null;
    }

--Debug发现，是异步拉取

    private void pullMessageAsync(
        final String addr,
        final RemotingCommand request,
        final long timeoutMillis,
        final PullCallback pullCallback
    ) throws RemotingException, InterruptedException {
        this.remotingClient.invokeAsync(addr, request, timeoutMillis, new InvokeCallback() {
            @Override
            public void operationComplete(ResponseFuture responseFuture) {
                RemotingCommand response = responseFuture.getResponseCommand();
                if (response != null) {
                    try {
                        PullResult pullResult = MQClientAPIImpl.this.processPullResponse(response, addr);
                        assert pullResult != null;
                        pullCallback.onSuccess(pullResult);
                    } catch (Exception e) {
                        pullCallback.onException(e);
                    }
                } else {
                    if (!responseFuture.isSendRequestOK()) {
                        pullCallback.onException(new MQClientException("send request failed to " + addr + ". Request: " + request, responseFuture.getCause()));
                    } else if (responseFuture.isTimeout()) {
                        pullCallback.onException(new MQClientException("wait response from " + addr + " timeout :" + responseFuture.getTimeoutMillis() + "ms" + ". Request: " + request,
                            responseFuture.getCause()));
                    } else {
                        pullCallback.onException(new MQClientException("unknown reason. addr: " + addr + ", timeoutMillis: " + timeoutMillis + ". Request: " + request, responseFuture.getCause()));
                    }
                }
            }
        });
    }

这里可以看到，发送的消息类型是PULL_MESSAGE

当申请到的messageQueue发生变化时，还需要同步给broker

RebalancePushImpl.messageQueueChanged()

 public void messageQueueChanged(String topic, Set mqAll, Set mqDivided) {
        
        SubscriptionData subscriptionData = this.subscriptionInner.get(topic);
        long newVersion = System.currentTimeMillis();
        log.info("{} Rebalance changed, also update version: {}, {}", topic, subscriptionData.getSubVersion(), newVersion);
        subscriptionData.setSubVersion(newVersion);

        int currentQueueCount = this.processQueueTable.size();
        if (currentQueueCount != 0) {
            int pullThresholdForTopic = this.defaultMQPushConsumerImpl.getDefaultMQPushConsumer().getPullThresholdForTopic();
            if (pullThresholdForTopic != -1) {
                int newVal = Math.max(1, pullThresholdForTopic / currentQueueCount);
                log.info("The pullThresholdForQueue is changed from {} to {}",
                    this.defaultMQPushConsumerImpl.getDefaultMQPushConsumer().getPullThresholdForQueue(), newVal);
                this.defaultMQPushConsumerImpl.getDefaultMQPushConsumer().setPullThresholdForQueue(newVal);
            }

            int pullThresholdSizeForTopic = this.defaultMQPushConsumerImpl.getDefaultMQPushConsumer().getPullThresholdSizeForTopic();
            if (pullThresholdSizeForTopic != -1) {
                int newVal = Math.max(1, pullThresholdSizeForTopic / currentQueueCount);
                log.info("The pullThresholdSizeForQueue is changed from {} to {}",
                    this.defaultMQPushConsumerImpl.getDefaultMQPushConsumer().getPullThresholdSizeForQueue(), newVal);
                this.defaultMQPushConsumerImpl.getDefaultMQPushConsumer().setPullThresholdSizeForQueue(newVal);
            }
        }

        // 通过心跳，通知broker,messageQueue消费发送变更
        this.getmQClientFactory().sendHeartbeatToAllBrokerWithLock();
    }