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From "Andres Rangel" <andr...@corp.moniker.com>
Subject Redelivering messages inconsistency
Date Wed, 17 Sep 2008 19:41:11 GMT
Hi We have been working on with ActiveMQ on a custom content based
router.

We first try to use Camel, but since the routes changed very often (the
routing instructions) then we decided to implement it using standard jms
code ,and deploying it in an embedded broker.

 

 

The Content Based Router does the following: reads from a channel, and
depending on the message it redelivers it to another channel.

 

Everything was working fine in my machine, and when we deployed to a
staging server, we encountered some problems.

The problem is in essence the following: the message gets delivered to
the corresponding channel by the content based Router, but our client
applications (the ones listening to these channels) cannot read those
messages, even though we can see the messages in the queues (using the
admin web console).

 

After much reading, I decided to "clone the message" that is copy the
incoming message in the content router, and send the new message.

And somehow it resolved the problem.

 

Today, I rolled back the code, to replicate the issue and could not
replicated. Strangely the application worked and the clients were
reading the messages.

 

I don't know what is happening.

 

I am really concerned that this problem may occur again in production
and we will not be able to correct it, since we have not identified the
source of the problem.

 

 

Is there a problem for ActiveMQ if I redeliver a message? Or should I
always clone it and send it again?

 

Thanks,

 

 

 

 

--

Andres Rangel

Sw Engineer

Moniker.com

 


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