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From "Hiram Chirino (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-2088) Change the InactivityMonitor to clear its flag as soon as a few bytes are received on a connection rather than only after an entire message has been assembled.
Date Wed, 25 Nov 2009 17:19:52 GMT

    [ https://issues.apache.org/activemq/browse/AMQ-2088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=56111#action_56111
] 

Hiram Chirino commented on AMQ-2088:
------------------------------------

I think a better approach would be for the wireformat to expose a counter which is incremented
as data is read.

That way between inactivity check intervals the inactivity monitor can check to see if that
value has changed since it's last check.

> Change the InactivityMonitor to clear its flag as soon as a few bytes are received on
a connection rather than only after an entire message has been assembled.
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: AMQ-2088
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2088
>             Project: ActiveMQ
>          Issue Type: Improvement
>          Components: Transport
>    Affects Versions: 5.1.0
>            Reporter: Torsten Mielke
>            Assignee: Dejan Bosanac
>            Priority: Critical
>             Fix For: 5.3.0
>
>
> On slow connections with larger messages to be exchanged, the inactivity monitor might
kick in, drop the network connection and re-establish it again. This prevents two brokers
from exchanging larger messages on a slow connection as the transmission always gets interrupted.
> See the discussion of this on http://activemq.apache.org/slow-networks-drop-large-messages.html.

> The problem is that the InactivityMonitor always waits for a complete message to be assembled
on an active connection before clearing its internal flag.
> I propose to change the behavior of the InactivityMonitor so that it clears its flag
already when a few bytes were received on a network connection rather than waiting for the
entire message to be sent. This should work around the problem of connections being dropped
and re-established periodically when receiving large messages.

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