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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Commented] (ARTEMIS-1902) Message redistribution is not stopped when consumers count on remote node reaches 0 (AMQP)
Date Mon, 04 Jun 2018 20:02:00 GMT


ASF GitHub Bot commented on ARTEMIS-1902:

GitHub user jbertram opened a pull request:

    ARTEMIS-1902 decrement before returning


You can merge this pull request into a Git repository by running:

    $ git pull ARTEMIS-1902

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #2121
commit be36d3078ceafe3df06a1686426f5d948dfadc2c
Author: Justin Bertram <jbertram@...>
Date:   2018-06-04T20:01:04Z

    ARTEMIS-1902 decrement before returning


> Message redistribution is not stopped when consumers count on remote node reaches 0 (AMQP)
> ------------------------------------------------------------------------------------------
>                 Key: ARTEMIS-1902
>                 URL:
>             Project: ActiveMQ Artemis
>          Issue Type: Bug
>    Affects Versions: 2.5.0, 2.6.0
>            Reporter: Martyn Taylor
>            Assignee: Martyn Taylor
>            Priority: Critical
>             Fix For: 2.6.1, 2.7.0
> With redistribution enabled and load balancing set to ON_DEMAND there is a case where
a consumer count on a remote node reaches 0, however the local broker continues redistributing. 
This can cause a whole magnitude of issues if the both brokers get in the same state.  Messages
are redistributed back and forth between each other and never hit the local queue, resulting
in message loss and potentially an OOM as each time the message is redistributed a copy is
> The issue looks to be caused by the cluster getting into a state where consumer counts
are below 0.  

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