Decrease default MQTT Maximum Packet Size #12352
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Given that the default max_message_size got decreased from 128 MiB to 16 MiB in RabbitMQ 4.0 in #11455, it makes sense to also decrease the default MQTT Maximum Packet Size from 256 MiB to 16 MiB. Since this change was missed in RabbitMQ 4.0, it is scheduled for RabbitMQ 4.1.
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Given that the default max_message_size got decreased from 128 MiB to 16 MiB in RabbitMQ 4.0 in #11455, it makes sense to also decrease the default MQTT Maximum Packet Size from 256 MiB to 16 MiB. Since this change was missed in RabbitMQ 4.0, it is scheduled for RabbitMQ 4.1.