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https://issues.apache.org/jira/browse/ARTEMIS-2757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17104669#comment-17104669
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Timothy A. Bish commented on ARTEMIS-2757:
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This behaviour seems to have started with this commit:
[f874a02d17eb7787410c69024397353e53fc7689|https://github.com/apache/activemq-artemis/commit/f874a02d17eb7787410c69024397353e53fc7689]
> AMQP: Broker grants credit before accepting the inbound messages that caused
> it to grant credit
> -----------------------------------------------------------------------------------------------
>
> Key: ARTEMIS-2757
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2757
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: AMQP
> Affects Versions: 2.12.0
> Environment: AMQP Client sending unsettled messages asynchronously
> Reporter: Timothy A. Bish
> Priority: Blocker
>
> The broker is granting credit to AMQP senders before it has processed and
> settled (accepted) incoming messages. When the client sends enough messages
> to the broker to have crossed the 70% mark that it uses as a replenishment
> threshold the broker is immediately granting more credit regardless of having
> actually enqueued and sent the settlement disposition to the sending client
> thereby essentially granting infinite amounts of credit to a sending client
> as it bombards the broker with messages.
>
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