Rabbitmq Message Ordering Guarantees

Rabbitmq Message Ordering Guarantees. This does not guarantee the completion of message. Queues in rabbitmq are ordered collections of messages.

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Messages published in one channel, passing through one exchange and one queue and one outgoing channel will be received in the same order that they were sent. If a message is delivered to a consumer and then requeued, either automatically by rabbitmq or by the same or different consumer, rabbitmq will set the redelivered flag on it when it is delivered again. The delivery guarantees are achieved by:

Jack Vanlightly, A Rabbitmq Core Team Member, Will Present On High Availability And Data Safety In Messaging On June 11Th, 2020.


Rabbitmq offers _at most once delivery_and_at least once delivery_but not_exactly once delivery_guarantees. The rabbitmq documentation states the following regarding its ordering guarantees: Messages are enqueued and dequeued (delivered to consumers) in the fifo manner.

Ordering Also Can Be Affected By The Presence Of Multiple Competing Consumers, Consumer Priorities, Message


Message publication order is guaranteed for one single queue, but not across multiple queues, which are processed in parallel. The ordering guarantees do not apply to redelivered messages, as the redelivery is changing the order of delivery. In rabbitmq, we can have multiple consumers listening from one queue.this is good for fast procesing, but not so good for message ordering.

But The Result Is That While The Queue Is Ordered, Processing Is Parallelised And So Ordering Is Weakened.


Rabbitmq is a mature and stable messaging server that uses the amqp protocol to interchange messages between producers and consumers. Rabbitmq requires using a stateful set to deploy a rabbitmq cluster to kubernetes. This means that we get strong ordering guarantees that we need while also scaling out.

We Can Have Multiple Consumers Consuming From A Single Queue, There Is No Restriction On The Number Of Consumers Of A Given Queue.


For the sake of simplicity, let’s say we have queue q. Fifo ordering is not guaranteed for priority and sharded queues. @michaelklishin my original issue is like this, we producer many message like (id, status), which can be (134378578, 0) or (231394533, 1), to one exchange, and so on to one queue, but i have several consumers listening this one queue.here comes the problem, i need to make sure the consumers consume the messages with the same 'id' in order.

This Does Not Guarantee The Completion Of Message.


The stateful set ensures that the rabbitmq nodes are deployed in order, one at a time. Jms based specification java messaging system : Quorum queues are the next generation of replicated queue that aim to replace most use cases for mirrored queues and are available from the 3.8 release and onward.

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