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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-6824) PrefetchExtension growth with transacted consumers
Date Tue, 26 Sep 2017 18:36:00 GMT

    [ https://issues.apache.org/jira/browse/AMQ-6824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16181287#comment-16181287
] 

ASF subversion and git services commented on AMQ-6824:
------------------------------------------------------

Commit 26788f5fd7109a3cf30210744b5900f84a8eafd9 in activemq's branch refs/heads/activemq-5.15.x
from [~gtully]
[ https://git-wip-us.apache.org/repos/asf?p=activemq.git;h=26788f5 ]

[AMQ-6824] - fix up prefetchExtension growth on transaction completion and delivered ack and
tie in boolean usePrefetchExtension

(cherry picked from commit 41a100766c19655816d575841ba559d33c63313d)


> PrefetchExtension growth with transacted consumers
> --------------------------------------------------
>
>                 Key: AMQ-6824
>                 URL: https://issues.apache.org/jira/browse/AMQ-6824
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.15.0
>            Reporter: Gary Tully
>            Assignee: Gary Tully
>             Fix For: 5.16.0
>
>
> With a transacted consumer on either a topic or queue the prefetch extension increments
only. This leads to flow control failing b/c the subscription is never full. Messages can
accumulate on the subscription dispatch channel if the consumer is blocked or slow. As a result,
memory usage limits can be exceeded for topics.
> There is a similar issue with client_ack mode and prefetch.



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