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https://issues.apache.org/jira/browse/APLO-280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14004739#comment-14004739
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Shani Elharrar commented on APLO-280:
-------------------------------------
Hi.
Does Apollo supports message groups with advanced settings like a TTL for a
message group or sequence reset (Like Active MQ does, With the JMSXGroupSeq =
-1 thing)?
Thanks.
> Clarification about message groups
> ----------------------------------
>
> Key: APLO-280
> URL: https://issues.apache.org/jira/browse/APLO-280
> Project: ActiveMQ Apollo
> Issue Type: Improvement
> Reporter: Lionel Cons
> Assignee: Hiram Chirino
> Fix For: 1.6
>
>
> First, there is a typo in the added doc as it contains "When you another
> subscription to a queue".
> Then, it seems there is a contradiction between "ensures that all messages
> for the same message group will be sent to the same consumer" and "the broker
> rebalances the message groups across consumers".
> Apollo has no way to know if new messages for an already seen message group
> will continue to come or not. So, by rebalancing, it may cause new messages
> of the same group to go to another consumer.
> IMHO, rebalancing can only happen safely when old consumers stop and only for
> their "attached" message groups.
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