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https://issues.apache.org/jira/browse/AMQ-2106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13465649#comment-13465649
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Gary Tully commented on AMQ-2106:
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I think rebalance is not really possible, because once a group is assigned and
the consumer is valid, moving it will break the expectation of getting the full
batch/group of messages.
But what we can fix is the allocation of new groups to the full complement of
consumers. So that new consumers can get their fair share of groups started
after they connect.
> Allow broker to evenly distribute message groups among consumers
> ----------------------------------------------------------------
>
> Key: AMQ-2106
> URL: https://issues.apache.org/jira/browse/AMQ-2106
> Project: ActiveMQ
> Issue Type: New Feature
> Components: Broker
> Affects Versions: 5.2.0
> Reporter: Dejan Bosanac
> Assignee: Gary Tully
> Fix For: 5.x
>
>
> Currently the broker will not reassign message groups if new consumers
> becomes available (or existing ones are removed). We could allow the broker
> to try reassign the message groups when consumers are added/removed so that
> we have a even distribution among consumers.
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