Reduce default maximum message size to 16MB #11455
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Given the heat of the discussion in #11187, we need to mention why the new value was set to 16 MiB. It is
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The 4.0 docs do not reflect this change: https://www.rabbitmq.com/docs/configure#config-items |
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Created rabbitmq/rabbitmq-website#2073 |
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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.
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Following this discussion #11187 we are setting the default maximum message size to 16MB.
This is just a default, and can be increased or decreased through the configuration setting
rabbit.max_message_size.Closes #11187.