rabbitmq ack

RABBITMQ Message Queuing: ACK mechanism Each consumer may take some time to process the received data. If in this process, consumer error, abnormal exit, and the data has not been processed, so unfortunately, this data is lost. Because we confirm it in a no-ack way, that is, every time the consumer is received, and whether or not it is done,

RABBITMQ Duplicate ACK causes message lossToo important so reproduced, as a private, I hope the original author do not blame Me RABBITMQ Duplicate acknowledgement causes message loss background RABBITMQ in the application scenario, most of the work Queue Work-queue mode is used. In a common work queue pattern, consum

timeout limit, and RABBITMQ is only re-delivered when the consumer is hung up. Even a message can take a long time to process. Message answering is turned on by default. We turn this mechanism off by displaying the settings autoask=true. It is now automatically answered, and once we complete the task, the consumer will automatically send an answer. Notifies the RABBITMQ that a message has been processed an

Added on the consumer MQ configuration file, the configuration key code is ACKNOWLEDEG = "Manual" , meaning that the consumer's ACK is manually (at this point the queue has been bound to the producer's exchange through a routekey) Create a new class Mqconsumer, implement the interface Channelawaremessagelistener, implement the OnMessage method, and do not need to specify a method. Key points after implementing the Channelawaremessagelistener

TCP requires ACK, but for efficiency, instead of waiting for ACK every time a piece of data is sent, it tries its best to use the window mechanism to accumulate ack sending, of course, in some special circumstances, Ack still needs to be sent immediately, for example, when unordered data is received, although the recei

The previous article analyzed how the receiving end sends ack to the sending end. In summary, it is ack immediately, Ack with latency and ACK. Now let's take a look at how the TCP sending end handles ack, essentially, the so-called TCP connection is the processing of seq and

receipt after consuming the message to RABBITMQ,RABBITMQ to receive the message receipt (msg acknowledgment) before removing the message from the queue If RABBITMQ does not receive a receipt and detects that the consumer's RABBITMQ connection is broken, RABBITMQ will send t

[RabbitMQ] 6. Confirm the message of the rabbitmq producer and the rabbitmq producer. Through the Publisher Confirms and Returns mechanism, the producer can determine whether the message is sent to exchange and queue. Through the consumer confirmation mechanism, Rabbitmq can decide whether to resend the message to the

the/virtual host: * is the usage in regular expressions. The permissions of RABBITMQ are configured according to different virtual hosts, which may not be the same as users in different virtual hosts (Vsan).2 RABBITMQ Security features 6 publish message acknowledgement mechanismIf the standard AMQP protocol is used, the only way to ensure that the message is not lost is to use the transaction mechanism-to

lost. This is not what we want to see. We hope that if a consumer client fails, we want to resend the task to another consumer client. To prevent message loss, RabbbitMQ provides a message confirmation mechanism. The consumer uses an ack to notify RabbitMQ that a message has been received and processed, and then RabbitMQ releases and deletes the message. If the

RabbitMQ Article 1: setup and configuration of rabbitMQ and rabbitmq Article 1 Install rabbitMQ in WindowsStep 1: Install software If rabbitMQ is installed, first install OTP software based on the erlang language, and then download the r