这篇文章主要讲解了“rocketmq中retryAnotherBrokerWhenNotStoreOK的原理和应用”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“rocketmq中retryAnotherBrokerWhenNotStoreOK的原理和应用”吧！
本文主要研究一下rocketmq的retryAnotherBrokerWhenNotStoreOK
rocketmq-client-4.5.2-sources.jar!/org/apache/rocketmq/client/producer/DefaultMQProducer.java
public class DefaultMQProducer extends ClientConfig implements MQProducer { private final InternalLogger log = ClientLogger.getLog(); //...... /** * Indicate whether to retry another broker on sending failure internally. */ private boolean retryAnotherBrokerWhenNotStoreOK = false; public boolean isRetryAnotherBrokerWhenNotStoreOK() { return retryAnotherBrokerWhenNotStoreOK; } public void setRetryAnotherBrokerWhenNotStoreOK(boolean retryAnotherBrokerWhenNotStoreOK) { this.retryAnotherBrokerWhenNotStoreOK = retryAnotherBrokerWhenNotStoreOK; } //...... }DefaultMQProducer有个retryAnotherBrokerWhenNotStoreOK属性，默认为false
rocketmq-client-4.5.2-sources.jar!/org/apache/rocketmq/client/impl/producer/DefaultMQProducerImpl.java
public class DefaultMQProducerImpl implements MQProducerInner { private final InternalLogger log = ClientLogger.getLog(); private final Random random = new Random(); private final DefaultMQProducer defaultMQProducer; private final ConcurrentMap<String/* topic */, TopicPublishInfo> topicPublishInfoTable = new ConcurrentHashMap<String, TopicPublishInfo>(); private final ArrayList<SendMessageHook> sendMessageHookList = new ArrayList<SendMessageHook>(); private final RPCHook rpcHook; protected BlockingQueue<Runnable> checkRequestQueue; protected ExecutorService checkExecutor; private ServiceState serviceState = ServiceState.CREATE_JUST; private MQClientInstance mQClientFactory; private ArrayList<CheckForbiddenHook> checkForbiddenHookList = new ArrayList<CheckForbiddenHook>(); private int zipCompressLevel = Integer.parseInt(System.getProperty(MixAll.MESSAGE_COMPRESS_LEVEL, "5")); private MQFaultStrategy mqFaultStrategy = new MQFaultStrategy(); private final BlockingQueue<Runnable> asyncSenderThreadPoolQueue; private final ExecutorService defaultAsyncSenderExecutor; private ExecutorService asyncSenderExecutor; //...... private SendResult sendDefaultImpl( Message msg, final CommunicationMode communicationMode, final SendCallback sendCallback, final long timeout ) throws MQClientException, RemotingException, MQBrokerException, InterruptedException { this.makeSureStateOK(); Validators.checkMessage(msg, this.defaultMQProducer); final long invokeID = random.nextLong(); long beginTimestampFirst = System.currentTimeMillis(); long beginTimestampPrev = beginTimestampFirst; long endTimestamp = beginTimestampFirst; TopicPublishInfo topicPublishInfo = this.tryToFindTopicPublishInfo(msg.getTopic()); if (topicPublishInfo != null && topicPublishInfo.ok()) { boolean callTimeout = false; MessageQueue mq = null; Exception exception = null; SendResult sendResult = null; int timesTotal = communicationMode == CommunicationMode.SYNC ? 1 + this.defaultMQProducer.getRetryTimesWhenSendFailed() : 1; int times = 0; String[] brokersSent = new String[timesTotal]; for (; times < timesTotal; times++) { String lastBrokerName = null == mq ? null : mq.getBrokerName(); MessageQueue mqSelected = this.selectOneMessageQueue(topicPublishInfo, lastBrokerName); if (mqSelected != null) { mq = mqSelected; brokersSent[times] = mq.getBrokerName(); try { beginTimestampPrev = System.currentTimeMillis(); if (times > 0) { //Reset topic with namespace during resend. msg.setTopic(this.defaultMQProducer.withNamespace(msg.getTopic())); } long costTime = beginTimestampPrev - beginTimestampFirst; if (timeout < costTime) { callTimeout = true; break; } sendResult = this.sendKernelImpl(msg, mq, communicationMode, sendCallback, topicPublishInfo, timeout - costTime); endTimestamp = System.currentTimeMillis(); this.updateFaultItem(mq.getBrokerName(), endTimestamp - beginTimestampPrev, false); switch (communicationMode) { case ASYNC: return null; case ONEWAY: return null; case SYNC: if (sendResult.getSendStatus() != SendStatus.SEND_OK) { if (this.defaultMQProducer.isRetryAnotherBrokerWhenNotStoreOK()) { continue; } } return sendResult; default: break; } } catch (RemotingException e) { endTimestamp = System.currentTimeMillis(); this.updateFaultItem(mq.getBrokerName(), endTimestamp - beginTimestampPrev, true); log.warn(String.format("sendKernelImpl exception, resend at once, InvokeID: %s, RT: %sms, Broker: %s", invokeID, endTimestamp - beginTimestampPrev, mq), e); log.warn(msg.toString()); exception = e; continue; } catch (MQClientException e) { endTimestamp = System.currentTimeMillis(); this.updateFaultItem(mq.getBrokerName(), endTimestamp - beginTimestampPrev, true); log.warn(String.format("sendKernelImpl exception, resend at once, InvokeID: %s, RT: %sms, Broker: %s", invokeID, endTimestamp - beginTimestampPrev, mq), e); log.warn(msg.toString()); exception = e; continue; } catch (MQBrokerException e) { endTimestamp = System.currentTimeMillis(); this.updateFaultItem(mq.getBrokerName(), endTimestamp - beginTimestampPrev, true); log.warn(String.format("sendKernelImpl exception, resend at once, InvokeID: %s, RT: %sms, Broker: %s", invokeID, endTimestamp - beginTimestampPrev, mq), e); log.warn(msg.toString()); exception = e; switch (e.getResponseCode()) { case ResponseCode.TOPIC_NOT_EXIST: case ResponseCode.SERVICE_NOT_AVAILABLE: case ResponseCode.SYSTEM_ERROR: case ResponseCode.NO_PERMISSION: case ResponseCode.NO_BUYER_ID: case ResponseCode.NOT_IN_CURRENT_UNIT: continue; default: if (sendResult != null) { return sendResult; } throw e; } } catch (InterruptedException e) { endTimestamp = System.currentTimeMillis(); this.updateFaultItem(mq.getBrokerName(), endTimestamp - beginTimestampPrev, false); log.warn(String.format("sendKernelImpl exception, throw exception, InvokeID: %s, RT: %sms, Broker: %s", invokeID, endTimestamp - beginTimestampPrev, mq), e); log.warn(msg.toString()); log.warn("sendKernelImpl exception", e); log.warn(msg.toString()); throw e; } } else { break; } } if (sendResult != null) { return sendResult; } String info = String.format("Send [%d] times, still failed, cost [%d]ms, Topic: %s, BrokersSent: %s", times, System.currentTimeMillis() - beginTimestampFirst, msg.getTopic(), Arrays.toString(brokersSent)); info += FAQUrl.suggestTodo(FAQUrl.SEND_MSG_FAILED); MQClientException mqClientException = new MQClientException(info, exception); if (callTimeout) { throw new RemotingTooMuchRequestException("sendDefaultImpl call timeout"); } if (exception instanceof MQBrokerException) { mqClientException.setResponseCode(((MQBrokerException) exception).getResponseCode()); } else if (exception instanceof RemotingConnectException) { mqClientException.setResponseCode(ClientErrorCode.CONNECT_BROKER_EXCEPTION); } else if (exception instanceof RemotingTimeoutException) { mqClientException.setResponseCode(ClientErrorCode.ACCESS_BROKER_TIMEOUT); } else if (exception instanceof MQClientException) { mqClientException.setResponseCode(ClientErrorCode.BROKER_NOT_EXIST_EXCEPTION); } throw mqClientException; } List<String> nsList = this.getmQClientFactory().getMQClientAPIImpl().getNameServerAddressList(); if (null == nsList || nsList.isEmpty()) { throw new MQClientException( "No name server address, please set it." + FAQUrl.suggestTodo(FAQUrl.NAME_SERVER_ADDR_NOT_EXIST_URL), null).setResponseCode(ClientErrorCode.NO_NAME_SERVER_EXCEPTION); } throw new MQClientException("No route info of this topic, " + msg.getTopic() + FAQUrl.suggestTodo(FAQUrl.NO_TOPIC_ROUTE_INFO), null).setResponseCode(ClientErrorCode.NOT_FOUND_TOPIC_EXCEPTION); } public MessageQueue selectOneMessageQueue(final TopicPublishInfo tpInfo, final String lastBrokerName) { return this.mqFaultStrategy.selectOneMessageQueue(tpInfo, lastBrokerName); } //...... }DefaultMQProducerImpl的sendDefaultImpl方法在communicationMode为SYNC时会判断sendResult.getSendStatus()是否是SendStatus.SEND_OK，不是的话，再判断defaultMQProducer.isRetryAnotherBrokerWhenNotStoreOK()，如果是则执行continue，否则直接返回sendResult；for循环里头维护了lastBrokerName，每次执行selectOneMessageQueue(topicPublishInfo, lastBrokerName)的时候会传递过去；selectOneMessageQueue方法执行的是mqFaultStrategy.selectOneMessageQueue(tpInfo, lastBrokerName)方法
rocketmq-client-4.5.2-sources.jar!/org/apache/rocketmq/client/latency/MQFaultStrategy.java
public class MQFaultStrategy { private final static InternalLogger log = ClientLogger.getLog(); private final LatencyFaultTolerance<String> latencyFaultTolerance = new LatencyFaultToleranceImpl(); private boolean sendLatencyFaultEnable = false; private long[] latencyMax = {50L, 100L, 550L, 1000L, 2000L, 3000L, 15000L}; private long[] notAvailableDuration = {0L, 0L, 30000L, 60000L, 120000L, 180000L, 600000L}; public long[] getNotAvailableDuration() { return notAvailableDuration; } public void setNotAvailableDuration(final long[] notAvailableDuration) { this.notAvailableDuration = notAvailableDuration; } public long[] getLatencyMax() { return latencyMax; } public void setLatencyMax(final long[] latencyMax) { this.latencyMax = latencyMax; } public boolean isSendLatencyFaultEnable() { return sendLatencyFaultEnable; } public void setSendLatencyFaultEnable(final boolean sendLatencyFaultEnable) { this.sendLatencyFaultEnable = sendLatencyFaultEnable; } public MessageQueue selectOneMessageQueue(final TopicPublishInfo tpInfo, final String lastBrokerName) { if (this.sendLatencyFaultEnable) { try { int index = tpInfo.getSendWhichQueue().getAndIncrement(); for (int i = 0; i < tpInfo.getMessageQueueList().size(); i++) { int pos = Math.abs(index++) % tpInfo.getMessageQueueList().size(); if (pos < 0) pos = 0; MessageQueue mq = tpInfo.getMessageQueueList().get(pos); if (latencyFaultTolerance.isAvailable(mq.getBrokerName())) { if (null == lastBrokerName || mq.getBrokerName().equals(lastBrokerName)) return mq; } } final String notBestBroker = latencyFaultTolerance.pickOneAtLeast(); int writeQueueNums = tpInfo.getQueueIdByBroker(notBestBroker); if (writeQueueNums > 0) { final MessageQueue mq = tpInfo.selectOneMessageQueue(); if (notBestBroker != null) { mq.setBrokerName(notBestBroker); mq.setQueueId(tpInfo.getSendWhichQueue().getAndIncrement() % writeQueueNums); } return mq; } else { latencyFaultTolerance.remove(notBestBroker); } } catch (Exception e) { log.error("Error occurred when selecting message queue", e); } return tpInfo.selectOneMessageQueue(); } return tpInfo.selectOneMessageQueue(lastBrokerName); } public void updateFaultItem(final String brokerName, final long currentLatency, boolean isolation) { if (this.sendLatencyFaultEnable) { long duration = computeNotAvailableDuration(isolation ? 30000 : currentLatency); this.latencyFaultTolerance.updateFaultItem(brokerName, currentLatency, duration); } } private long computeNotAvailableDuration(final long currentLatency) { for (int i = latencyMax.length - 1; i >= 0; i--) { if (currentLatency >= latencyMax[i]) return this.notAvailableDuration[i]; } return 0; } }MQFaultStrategy的selectOneMessageQueue方法首先判断是否开启sendLatencyFaultEnable，默认为false，直接走tpInfo.selectOneMessageQueue(lastBrokerName)
rocketmq-client-4.5.2-sources.jar!/org/apache/rocketmq/client/impl/producer/TopicPublishInfo.java
public class TopicPublishInfo { private boolean orderTopic = false; private boolean haveTopicRouterInfo = false; private List<MessageQueue> messageQueueList = new ArrayList<MessageQueue>(); private volatile ThreadLocalIndex sendWhichQueue = new ThreadLocalIndex(); private TopicRouteData topicRouteData; //...... public MessageQueue selectOneMessageQueue(final String lastBrokerName) { if (lastBrokerName == null) { return selectOneMessageQueue(); } else { int index = this.sendWhichQueue.getAndIncrement(); for (int i = 0; i < this.messageQueueList.size(); i++) { int pos = Math.abs(index++) % this.messageQueueList.size(); if (pos < 0) pos = 0; MessageQueue mq = this.messageQueueList.get(pos); if (!mq.getBrokerName().equals(lastBrokerName)) { return mq; } } return selectOneMessageQueue(); } } public MessageQueue selectOneMessageQueue() { int index = this.sendWhichQueue.getAndIncrement(); int pos = Math.abs(index) % this.messageQueueList.size(); if (pos < 0) pos = 0; return this.messageQueueList.get(pos); } //...... }TopicPublishInfo的selectOneMessageQueue在lastBrokerName为null的时候执行selectOneMessageQueue，采取的轮询的方式选择MessageQueue；lastBrokerName不为null的时候，最多循环messageQueueList.size()次，选出一个brokerName不为lastBrokerName的MessageQueue；如果都没有选到最后通过无参的selectOneMessageQueue来选择
DefaultMQProducerImpl的sendDefaultImpl方法在communicationMode为SYNC时会判断sendResult.getSendStatus()是否是SendStatus.SEND_OK，不是的话，再判断defaultMQProducer.isRetryAnotherBrokerWhenNotStoreOK()，如果是则执行continue，否则直接返回sendResult；for循环里头维护了lastBrokerName，每次执行selectOneMessageQueue(topicPublishInfo, lastBrokerName)的时候会传递过去；selectOneMessageQueue方法执行的是mqFaultStrategy.selectOneMessageQueue(tpInfo, lastBrokerName)方法
感谢各位的阅读，以上就是“rocketmq中retryAnotherBrokerWhenNotStoreOK的原理和应用”的内容了，经过本文的学习后，相信大家对rocketmq中retryAnotherBrokerWhenNotStoreOK的原理和应用这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是亿速云，小编将为大家推送更多相关知识点的文章，欢迎关注！
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