On 29/11/2019 3:42 pm, VERMEULEN Olivier wrote:
Hello,
First let me explain the setup.
We have 1 Broker-J (version 7.1.3) with 1 queue.
We have 1 Dispatch-Router (version 1.9.0) with 1 waypoint address and 1 out
auto-link.
The queue contains 10 messages.
When I create a JMS consumer (with jms.prefetchPolicy.all=1), consume 1 message and close
the consumer I see the "outbound messages" statistic of the Broker-J increasing
way more than I would expect, around +30 messages...
Is this expected ?
I'm not sure what exactly the 'outbound messages' statistic tracks, but
it is certainly expected that there will be more than 1 transfer between
broker and router, more even than the 10 messages on the queue.
Credit is not directly propagated from consumer link to the broker link.
The broker will be granted credit based on the prefetch setting on the
connector (250 by default). The router will deliver the first message to
the consumer that gave it one credit. When the consumer closes, all
other messages for the address will be released and drain request will
be issued to any sender links (i.e. the broker). However the broker will
still have credit so it when the messages are released it will
immediately send them back (and they will then be released again).
In the trace you included it seems there are 19 transfers from broker to
router (the last 9 get resent once before the credit is drained).
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