New TCP/IP error messages on V5R2

Since going from V5R1 to V5R2 we have been getting these TCP/IP messages in our 
qsysopr msgq.  Anyone seen this before?  New tweak in V5R2?

Jerry

TCP/IP connection to remote system 172.16.16.28 closed, reason code 1.
TCP/IP connection to remote system 172.16.1.14 closed, reason code 2.  
TCP/IP connection to remote system 172.16.1.31  closed, reason code 3.

                         Additional Message Information                        
                                                                               
 Message ID . . . . . . :   TCP2617       Severity . . . . . . . :   20        
 Message type . . . . . :   Diagnostic                                         
 Date sent  . . . . . . :   07/16/03      Time sent  . . . . . . :   10:44:53  
                                                                               
 Message . . . . :   TCP/IP connection to remote system 172.16.1.31 closed,    
   reason code 2.                                                              
 Cause . . . . . :   The TCP/IP connection to remote system 172.16.1.31 has    
   been closed. The connection was closed for reason code 2.  Full connection  
   details for the closed connection include:                                  
     - local IP address is 172.16.1.10                                         
     - local port is 491                                                       
     - remote IP address is 172.16.1.31                                        
     - remote port is 515                                                      
 Reason codes and their meanings follow:                                       
     1 = TCP connection closed due to expiration of 10 minute Close Wait timer.
     2 = TCP connection closed due to R2 retry threshold being run.            
     3 = TCP connection closed due to keepalive timeout.                       
If TCPCNNMSG(*THRESHOLD) is defined for the Change TCP/IP Attributes (CHGTCPA)
  command then there could be additional connections that have closed within  
  the threshold window. The number of additional TCP connections that have    
  closed is 0.                                                                
Recovery  . . . :   Informational message.                                    


Jerome Draper, Trilobyte Software Systems