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https://issues.apache.org/jira/browse/ARTEMIS-1862?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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clebert suconic reopened ARTEMIS-1862:
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> fix acceptor config default for 'amqpLowCredits' and update related code
> defaults
> ---------------------------------------------------------------------------------
>
> Key: ARTEMIS-1862
> URL: https://issues.apache.org/jira/browse/ARTEMIS-1862
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: AMQP
> Affects Versions: 2.5.0
> Reporter: Robbie Gemmell
> Priority: Major
> Fix For: 2.6.0
>
>
> The brokers AMQP protocol support has configurable 'amqpCredits' and
> 'amqpLowCredits' values to govern the amount of credit given to a producer at
> a time and when it is refreshed. The broker.xml files appears to set these to
> values of 1000 and 300 respectively by default, while the code has default
> values of 100 and 30 instead.
> The XML configuration for the 'amqp' acceptor (using the AMQP port, 5672) has
> incorrectly had the value 'amqpMinCredits' applied rather than
> 'amqpLowCredits' as required and used on the 'artemis' acceptor, and as
> result this has no effect and the codes fallback of 30 gets used instead.
> This results in the broker waiting until it has processed very nearly every
> message a producer could have sent with the outstanding credit before sending
> any new credit, meaning producers with reasonable throughput will likely get
> stalled awaiting more credit repeatedly.
> The change in the coming PR corrects the XML config, changes the code to use
> the same values as this for a consistent default, and adds a test to verify
> the default credit refresh behaviour is as expected.
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