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From "Shani Elharrar (JIRA)" <>
Subject [jira] [Commented] (APLO-280) Clarification about message groups
Date Wed, 21 May 2014 15:02:38 GMT


Shani Elharrar commented on APLO-280:


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)?


> Clarification about message groups
> ----------------------------------
>                 Key: APLO-280
>                 URL:
>             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
> IMHO, rebalancing can only happen safely when old consumers stop and only for their "attached"
message groups.

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