Incrementing thread counter using MDB's ?

[nkhadakk]

JBoss 4.2.1/ JBM 1.3 GA

We use MDBs running as endpoints for JMS messages. Running a load test on our code, here is a sample of logs that i see on the JBoss AS.

com/favicon.ico|resolved:true|recommended:true|lastupdatedtime:0
16:11:36,079 DEBUG [WorkManager(2)-1675]: org.jboss.jms.server.endpoint.ServerConnectionEndpoint - Connection 2736 stopped
16:11:36,079 DEBUG [WorkManager(2)-1675]: org.jboss.jms.server.endpoint.ServerConnectionEndpoint - Connection 2736 stopped
16:11:36,091 INFO [WorkManager(2)-1676]: com.getmedium.services.urivalidation.ejbs.UriMDB - JMS URL::http://wwwapps.ups.com/WebTracking/track
16:11:36,092 INFO [WorkManager(2)-1676]: com.getmedium.services.urivalidation.ejbs.UriValidator - UriValidator::http://wwwapps.ups.com/WebTracking/track
16:11:36,092 INFO [WorkManager(2)-1676]: com.getmedium.services.urivalidation.ejbs.UriValidator - Running HTML parser
16:11:36,093 DEBUG [WorkManager(2)-1676]: com.getmedium.services.urivalidation.HtmlParser - resolving {}http://wwwapps.ups.com/WebTracking/track
16:11:36,108 INFO [WorkManager(2)-1674]: com.getmedium.services.urivalidation.HtmlParser - Resolving URL::http://www.datingnetwork.com
16:11:36,109 INFO [WorkManager(2)-1674]: com.getmedium.services.urivalidation.HtmlParser - URL isResolved::true
16:11:36,109 INFO [WorkManager(2)-1674]: com.getmedium.services.urivalidation.HtmlParser - Found a title Token
16:11:36,301 INFO [WorkManager(2)-1676]: com.getmedium.services.urivalidation.HtmlParser - Resolving URL::http://wwwapps.ups.com/WebTracking/track
16:11:36,301 INFO [WorkManager(2)-1676]: com.getmedium.services.urivalidation.HtmlParser - URL isResolved::true
16:11:36,305 INFO [WorkManager(2)-1676]: com.getmedium.se

The section of the log with this expression :
[WorkManager(2)-1676] bothers me. the number you see 1676 started from 0. This number keeps incrementing as the load test progresses. The log messages are coming from the MDB.
My reading of this display is that this log line is generated by the Thread#1676 in Thread group WorkManager(2).

Is this right ? Should the thread count continue to increment ?If pooling ...i would expect to see these numbers being re-used. Is this number increment symptomatic of misconfiguration on my part ? I have not profiled the server yet.
The server has not crashed . Yet :))

Here is my Log4J pattern :

log4j.appender.stdout.layout.ConversionPattern = %d{ABSOLUTE} %p %x [%t]: %c - %m%n

[nkhadakk]

oops... even though the question is about MDB's... i guess this question belongs to the ejb3 forum.