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From "James Strachan" <james.strac...@gmail.com>
Subject Re: UDP buffer problem
Date Thu, 21 Jun 2007 06:41:14 GMT
UDP is unreliable; whatever the buffer size is, messages can still get
discarded if a client doesn't process them fast enough etc.

So we need a working reliable layer on top of UDP which is capable of
handling re-requests of missing packets etc. The current code is work
in progress; which nearly works, but requires some more work - feel
free to work on it, we welcome patches!

http://activemq.apache.org/contributing.html

On 6/21/07, Jiang <zju_jjc@163.com> wrote:
>
> I still not find the correct way to resolve this problem. I have changed the
> replayBufferCommandCount to 1000 and compiled the source code . Then I
> replaced the ReliableTransport.class in the lib. But when I run the client,
> it was the same.  "Request for buffer xx is no longer present" in eclipse
> console and in windows cmd console it throw "duplicate message be
> discarded".
> Why ? Any one can give some help? Thanks
>
> Jiang wrote:
> >
> > I config UDP in activemq.xml to use udp transport. But When I register 20
> > consumer and 1 producer in one destination, I find if I send several
> > messages , broker will throw: "Request for buffer xx is no longer present"
> > in console . After I view the udp code , I think maybe it is caused by the
> > udp buffer size( default 50 ) , what I think is correct ? How can I use
> > code to change the default size or maybe it can changed through
> > activemq.xml ? (When connection is created by connectionfactory I don't
> > find how to change the udp transport buffer size )
> >
>
> --
> View this message in context: http://www.nabble.com/UDP-buffer-problem-tf3899903s2354.html#a11225458
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>


-- 
James
-------
http://macstrac.blogspot.com/

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