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From "Timothy Bish (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (AMQCPP-161) CMS does not support prefetchSize=0 correctly
Date Sun, 03 Feb 2008 18:37:37 GMT

     [ https://issues.apache.org/activemq/browse/AMQCPP-161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Timothy Bish resolved AMQCPP-161.
---------------------------------

    Resolution: Fixed

Fixed in trunk, SVN: 617920

> CMS does not support prefetchSize=0 correctly
> ---------------------------------------------
>
>                 Key: AMQCPP-161
>                 URL: https://issues.apache.org/activemq/browse/AMQCPP-161
>             Project: ActiveMQ C++ Client
>          Issue Type: Bug
>          Components: CMS Impl
>    Affects Versions: 2.1.2
>            Reporter: Dominic Tulley
>            Assignee: Timothy Bish
>             Fix For: 2.2
>
>         Attachments: main.cpp
>
>
> AMQ-850 introduced the ability to set the message prefetch size to 0.
> This means that no messages are prefetched and every receive() call goes all the way
to the broker to get the next message.
> It was only a valid option for synchronous message receivers.
> In CMS it does not appear to work.  Instead, a client set to use this simply receives
no messages, and the messages remain on the queue.
> Without this patch, it is possible for a slow consumer to hide an important message from
other consumers because it has prefetched it.

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