Major Description
AMQP reencoding is using Netty pooled heap buffers to encode the message, creating heap arenas that would affect the broker heap memory footprint: this could be saved by using off-heap/direct arenas that are already allocated by the broker for networking.
What can cause messages to be re-encoded is sending them across bridges, that means that cluster connections (that are special bridges) can stealthy affect the broker memory footprint.
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