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From "Rajith Attapattu (JIRA)" <qpid-...@incubator.apache.org>
Subject [jira] Commented: (QPID-1692) Set the sync bit periodically to force the broker to send completions
Date Mon, 16 Mar 2009 16:03:50 GMT

    [ https://issues.apache.org/jira/browse/QPID-1692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12682345#action_12682345
] 

Rajith Attapattu commented on QPID-1692:
----------------------------------------

A fix has been commited to Qpid trunk at rev 748197.
The current solution does set the sync bit on message accepts every x milisecs defined by
qpid.session.max_ack_delay (default 1000 msecs)
I agree that if you happen to publish durable messages on the same session (as the one you
are consuming) then there would definitely be a performance issue.
(Note that a message accept is only sent if there are unacked messages)

This is not the ideal solution and it is reusing the timer that is used for sending message
acks periodically.

> Set the sync bit periodically to force the broker to send completions
> ---------------------------------------------------------------------
>
>                 Key: QPID-1692
>                 URL: https://issues.apache.org/jira/browse/QPID-1692
>             Project: Qpid
>          Issue Type: Improvement
>          Components: Java Client
>    Affects Versions: M4
>            Reporter: Rajith Attapattu
>            Assignee: Rajith Attapattu
>
> It would be good if the JMS client could periodically set the sync bit to force the broker
to send completion of commands.
> This would prevent messages being duplicated unnessacerily during a failover and also
as means to clear it's replay buffer.
> (Note that we also have -Dqpid.session.command_limit and -Dqpid.session.byte_limit that
will send a sessionFlush whenever one of the limits are reached)

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