Use credit flow for dest side of on-publish shovels (backport #5715) #5778
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This avoids message queue build up of the rabbit_writer process in case the destination is slow (or blocked by a resource alarm) and the sending to the socket blocks. This is applied only for one of the ack-modes: - on-confirm: already has acknowledgment for each message - on-publish: now has credit based flow control - which allows multiple but finite number of on-the-fly messages at any time - no-ack: highest performance and asynchronicity without any guarantees fixes #3407 (cherry picked from commit 963b54d)
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This is an automatic backport of pull request #5715 done by Mergify.
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