1 by producer.setRetryTimesWhenSendFailed(count)
the number of messages sent by the producer to set the retry time to failure, the default value 2
, i.e. after a failure, twice retried, the message transmitted three times in total
# com.alibaba.rocketmq.client.producer.DefaultMQProducer
private int retryTimesWhenSendFailed = 2;
2. The message sent by the producer retry mechanism
Paste the source code, the client version number is: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