When does this message come out?

AIX 5.1
DB2 8.2 + FP12

2006-11-07-09.01.57.130816+540 I1173501C455 LEVEL: Error
PID : 1204390 TID : 1 PROC : db2agent (TCMDB) 0
INSTANCE: tcminst NODE : 000 DB : TCMDB
APPHDL : 0-666 APPID: AC150A15.K406.011686235053
FUNCTION: DB2 UDB, common communication, sqlcctcptest, probe:11
MESSAGE : Detected client termination
DATA #1 : Hexdump, 2 bytes
0x2FF120E2 : 0036 .6

2006-11-07-09.01.57.131467+540 I1173957C437 LEVEL: Error
PID : 1204390 TID : 1 PROC : db2agent (TCMDB) 0
INSTANCE: tcminst NODE : 000 DB : TCMDB
APPHDL : 0-666 APPID: AC150A15.K406.011686235053
FUNCTION: DB2 UDB, common communication, sqlcctest, probe:50
MESSAGE : sqlcctest RC
DATA #1 : Hexdump, 2 bytes
0x2FF13150 : 0036 .6

2006-11-07-09.01.57.131718+540 I1174395C437 LEVEL: Error
PID : 1204390 TID : 1 PROC : db2agent (TCMDB) 0
INSTANCE: tcminst NODE : 000 DB : TCMDB
APPHDL : 0-666 APPID: AC150A15.K406.011686235053
FUNCTION: DB2 UDB, base sys utilities, sqleqint, probe:10
MESSAGE : sqleqint2 iRC
DATA #1 : Hexdump, 4 bytes

most of the time, this is a client that left, without reset of connection
db2 connect reset
just closing the window of shutdown of client or any other scenario