when are queue messages scavenged?

[sleeperab]

hello,

i have a MDB consumes messages from a queue. there are
various clients post messages to the queue. everything
seems to be working fine. the MDB processes the messages
orderly. however, i noticed the queue persistent file
(in the jboss/db/jbossmq folder) keeps growing. with
the amount of the traffic it quickly grows to 10's of
MBytes. is this normal? or did i deploy the MDB wrong?

thanks in advance for any help.

-- jerry

i'm using 244 and this is my ejb-jar.xml

<message-driven>
<ejb-name>xxxxx</ejb-name>
<ejb-class>xxxxx</ejb-class>
<message-selector></message-selector>
<transaction-type>Container</transaction-type>

<message-driven-destination>
<destination-type>javax.jms.Queue</destination-type>
</message-driven-destination>
</message-driven>

<assembly-descriptor>
<container-transaction>

<ejb-name>xxxxx</ejb-name>
<method-name>*</method-name>

<trans-attribute>NotSupported</trans-attribute>
</container-transaction>
</assembly-descriptor>

and this is my jboss.xml

<enterprise-beans>
<message-driven>
<ejb-name>xxxxx</ejb-name>
<jndi-name>xxxxx</jndi-name>
<configuration-name>xxxxx</configuration-name>
<destination-jndi-name>x</destination-jndi-name>
</message-driven>
</enterprise-beans>

[schaefera]

Hi

This depends on what type of messages you send. If you are
worried about the size of these files use the "rollinglogged" Persistence Manager or in JBoss 3.x the DB based on.
Note that the file based PM does not remove messages from the file because this is a costly operation. Instead it does mark messages are delivered.

Have fun - Andy

[seanx]

Andy,
I am using JBoss 3.0 and thinking about using Sybase rather than hypersonic just because Sybase is supported internally. Is there any problem using a central sybase server for all the JBoss servers in a cluster? Is there a JBossmq-service.xml based on Sybase?

thanks,

[schaefera]

Hi

To do so you have to use different tables meaning you have to adjust the SQL statements for each server.

I think there is one. Please check out:
JBOSS_HOME/docs/examples/jca/sybase-ds.xml

Have fun - Andy

[wdfink]

In case of using "rollinglogged" PM
What happens if the size of the PM-file (free size of delivered Messages) is less than the received Message?

We have this kind of Problem, so we have sometimes Messages &gt;&gt; 10MB !

Wolf