Description of problem:
Call time statistics of EJB 2.1 stateless session beans are not correctly generated after some load on JON 2.4.1

Version-Release number of selected component (if applicable):
JON 2.4.1

How reproducible:
every time.

Steps to Reproduce:

1) Install EAP 5.1
2) copy all configuration to etat1 and etat2
3) remove messaging from etat1/deploy and etat2/deploy
4) deploy EAR to etat1/deploy and etat2/deploy
5) add virtual IP addresses bound to localhost as root via:

     [root@dhcp-64-60 chrome]# ip addr add 192.168.100.50/32 dev lo
     [root@dhcp-64-60 chrome]# ip addr add 192.168.100.51/32 dev lo

6) start Jboss instances:
    ./run.sh -c etat1 -b 192.168.100.50 
    ./run.sh -c etat2 -b 192.168.100.51

7) Install JON 2.4.1, install the corresponding JON agent 
8) Let JON 2.4.1 import those two EAP 5.1 instances
9) In JON on both TestBeans include Call Time Measurement and set collection interval to 1min
10 Put some load on the web app by calling the following script a few seconds/minutes:

#!/bin/sh
URLS="http://192.168.100.50:8080/etatWeb/TestEJBServlet http://192.168.100.51:8080/etatWeb/TestEJBServlet"

while [ 1 ]
do
        for url in $URLS 
        do 
                wget $url -a etat.log
        done        
done

11) Go to Operations, request "View Method Statistics" and check the output (should look fine);
12) Stop the script;
13) Repeat step 11 - and check the result - the following report is generated:

Method Name 	Count 	Total Time 	Min Invocation Time 	Max Invocation Time 	Actions
sayHello 	0 	0 	9223372036854775807 	0 	
View
remove 	0 	0 	9223372036854775807 	0 	
View
create 	0 	0 	9223372036854775807 	0 	
View

  
Actual results:


Expected results:


Additional info: attached etat.ear.tar.gz and callTimeStatistics_stop1.png files