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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-6088) [Java Client] AMQP 0-8/8/9-1 prefetch should auto expand when receive is called in a situation where the prefetch buffer is full
Date Mon, 08 Sep 2014 17:05:29 GMT

    [ https://issues.apache.org/jira/browse/QPID-6088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14125759#comment-14125759
] 

ASF subversion and git services commented on QPID-6088:
-------------------------------------------------------

Commit 1623431 from [~godfrer] in branch 'qpid/trunk'
[ https://svn.apache.org/r1623431 ]

QPID-6088 : [Java Client] reenable logging test

> [Java Client] AMQP 0-8/8/9-1 prefetch should auto expand when receive is called in a
situation where the prefetch buffer is full
> --------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: QPID-6088
>                 URL: https://issues.apache.org/jira/browse/QPID-6088
>             Project: Qpid
>          Issue Type: Improvement
>          Components: Java Client
>            Reporter: Rob Godfrey
>            Assignee: Keith Wall
>             Fix For: 0.31
>
>
> 0-8/9/9-1 controls the message prefetch on a per-session basis... however space if not
freed in the prefetch buffer until messages are acknowledged/committed.
> In the case of client-ack / transactional messaging setting the prefetch value to a low
number (e.g. 1) and then attempting to receive() multiple messages can lead to an effective
deadlock whereby the client is waiting for a message that cannot come because the prefetch
buffer is "full".
> In the case where the client is explicitly calling receive() through the API we should
expand the prefetch buffer in an attempt to meet their request for new messages.



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