本篇内容介绍了“RocketMQ生产端消息重试机制的使用方法”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
1.可以通过 producer.setRetryTimesWhenSendFailed(count)
来设置生产者发送消息时候失败重试的次数,默认值是2
,即失败一次后,会重试两次,总共发送三次消息
# com.alibaba.rocketmq.client.producer.DefaultMQProducer
private int retryTimesWhenSendFailed = 2;
2.生产者发送消息重试机制
贴上源码,客户端版本号是:3.2.6
# com.alibaba.rocketmq.client.impl.producer.DefaultMQProducerImpl#sendDefaultImpl
int timesTotal = 1 + this.defaultMQProducer.getRetryTimesWhenSendFailed();
int times = 0;
String[] brokersSent = new String[timesTotal];
for (; times < timesTotal && (endTimestamp - beginTimestamp) < maxTimeout; times++) {
String lastBrokerName = null == mq ? null : mq.getBrokerName();
MessageQueue tmpmq = topicPublishInfo.selectOneMessageQueue(lastBrokerName);
if (tmpmq != null) {
mq = tmpmq;
brokersSent[times] = mq.getBrokerName();
try {
sendResult = this.sendKernelImpl(msg, mq, communicationMode, sendCallback, timeout);
endTimestamp = System.currentTimeMillis();
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 (Exception e) {
endTimestamp = System.currentTimeMillis();
continue;
}
}
else {
break;
}
} // end of
“RocketMQ生产端消息重试机制的使用方法”的内容就介绍到这里了,感谢大家的阅读。如果想了解更多行业相关的知识可以关注天达云网站,小编将为大家输出更多高质量的实用文章!