Introduction to kafka, data order, data disorder (10)

data order

Data disorder

max.in.flight.requests.per.connection specifies how many messages the producer can send before receiving a response from the server.

Before version 1.x, kafka ensured that single partitions are in order, and the conditions are as follows:
max.in.flight.requests.per.connection=1
2) In versions 1.x and later, kafka ensures that single-interval data partitions are in order, and the conditions are as follows:
Disabled Idempotency
max.in.flight.requests.per.connection needs to be set to 1
to enable idempotency
max.in.flight.requests.per.connection needs to be set to be less than or equal to 5.
Reason: Because after kafka1.x, start idempotence Finally, Kafka will cache the latest 5 request source data sent by the producer, so no matter what, it can guarantee that the last 5 request data are in order