[
https://issues.apache.org/jira/browse/ARTEMIS-2118?focusedWorklogId=197888&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-197888
]
ASF GitHub Bot logged work on ARTEMIS-2118:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 13/Feb/19 02:09
Start Date: 13/Feb/19 02:09
Worklog Time Spent: 10m
Work Description: billpoole-mi commented on issue #2548: ARTEMIS-2118
Enhanced Message Groups Support
URL: https://github.com/apache/activemq-artemis/pull/2548#issuecomment-463025385
I have a couple of questions regarding the "support rebalancing groups when
a consumer is added" aspect of this change:
- When a message group X is rebalanced from consumer A to consumer B, how
will consumer A be informed that it is no longer assigned message group X and
shouldn't expect any further messages in that message group? Will Artemis send
the consumer a message, perhaps with JMSXGroupSeq = -1, or perhaps some kind of
special header like JMSXGroupLastForConsumer?
- Can consumer A release possession of the messages in message group X that
consumer A is still processing (i.e. hasn't yet acknowledged) by acknowledging
those messages as "released" (as opposed to accepted/rejected), such that those
messages are then resent by Artemis to consumer B?
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
Issue Time Tracking
-------------------
Worklog Id: (was: 197888)
Time Spent: 20m (was: 10m)
> Enhanced Message Groups Support
> --------------------------------
>
> Key: ARTEMIS-2118
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2118
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: Broker
> Reporter: Michael Andre Pearce
> Assignee: Michael Andre Pearce
> Priority: Major
> Time Spent: 20m
> Remaining Estimate: 0h
>
> This ticket is for supporting some Message Group Enhancements.
>
> Currently Artemis implements message groups in a simple way, equivalent to
> SimpleMessageGroupMap in activemq5.
> [http://activemq.apache.org/message-groups.html]
> "SimpleMessageGroupMap keeps track of every group but suffers from unbounded
> memory use."
>
> For use cases migrating from activemq5 its important artemis supports similar
> MessageGroupHashBucked feature.
> "MessageGroupHashBucked keeps track of every group and has bounded memory
> use."
> As such, this JIRA is to add support for being able to enable a semantic
> equivalent to MessageGroupHashBucket from activemq5, at the queue level.
>
> Also currently it is not possible for a specific queue disable grouping, this
> can be useful where a shared address by many queues, where some consumers
> care for ordering and others do not.
> Lastly add an ability to rebalance message groups when a consumer is added,
> this is useful where you want groups more evenly balanced when consumers come
> online, even after dispatching started.
>
>
>
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
