Not all JMS consumers are created equal

Hi,
I am experiencing a very strange problem with weblogic 9.2 JMS.
I am using JMS as flow control in an application that allows our users to import data into our application.
the data to be imported varies in size from 100's of records to many hundred thousands of records.
JMS feed a MDB that takes the request and imports the data. The DD allows to 10 concurrent MDB's to service the requests.
The problem arises when the 11'th and 12th request comes in. Instead of waiting for the first availibe MDB to service the requests they seems to be put into the queue of the MDB that was started first. If this MDB is in the process of importing a very large file request 11 and 12 will sit and wait until the large one is done even though there are other MDB's that are idle.
I am hoping that there is an easy fix for this, but for the life of me, I cant seem to find it.
The DD for the MDB looks as follows
<weblogic-enterprise-bean>
<ejb-name>RuleEngineMDB</ejb-name>
<message-driven-descriptor>
<pool>
<max-beans-in-free-pool>10</max-beans-in-free-pool>
<initial-beans-in-free-pool>10</initial-beans-in-free-pool>
</pool>
<destination-jndi-name>com.company.product.RuleEngineRequestQueue</destination-jndi-name>
</message-driven-descriptor>
</weblogic-enterprise-bean>
the queue is defined in Weblog as
<queue name="RuleEngineReque
stQueue">
<sub-deployment-name>MyJMSServer</sub-deployment-name>
<delivery-params-overrides>
<delivery-mode>Non-Persistent</delivery-mode>
</delivery-params-overrides>
<message-logging-params>
<message-logging-enabled>true</message-logging-enabled>
<message-logging-format>%header%,%properties%,%body%</message-logging-format>
</message-logging-params>
<jndi-name>com.company.product.RuleEngineRequestQueue</jndi-name>
</queue>
regards,
Lars Hansson
CTO Compost Marketing AB.

A little more detail: You will need to configure and target a custom conection factory with "message maximum" set to 1 (the default is 10), and then modify the MDB descriptor to reference the JNDI name of the custom connection factory. The connection factory should be targeted to the entire cluster, and must be targeted to the same cluster that hosts distributed queue. If the MDB is transactional, ensure that that the custom connection factory is also "xa enabled".
Edited by: TomB on Mar 2, 2010 2:44 PM

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