Possible reason for this message in db2diag.log (II)

[zhif]

What will the potential reason cause the following two error messages.

2007-04-13-10.41.26.994282-240 I117470C515 LEVEL: Error
PID : 57806 TID : 1 PROC : db2agentg (HAMDB2 ) 0
INSTANCE: db2inst1 NODE : 000 DB : LETMAP
APPHDL : 0-703 APPID: CF82B7D0.DD39.0 70411155341
FUNCTION: DB2 UDB, DRDA Application Server, sqljsTermAgentR eply, probe:10
MESSAGE : DIA5000C A DRDA AS token "AGENT TERMINATING" was detected. The
diagnostic data returned is (SRVDGN): "SQLERRP:SQLJCM N
SQLCODE:-30081".

2007-04-13-10.41.27.293120-240 I117986C735 LEVEL: Error
PID : 57806 TID : 1 PROC : db2agentg (HAMDB2 ) 0
INSTANCE: db2inst1 NODE : 000 DB : LETMAP
APPHDL : 0-703 APPID: CF82B7D0.DD39.0 70411155341
DATA #1 : SQLCA, PD_DB2_TYPE_SQL CA, 136 bytes
sqlcaid : SQLCA sqlcabc: 136 sqlcode: -30081 sqlerrml: 42
sqlerrmc: 32 * 0 TCP/IP SOCKETS 207.130.239.66 send
sqlerrp : SQLJCMN
sqlerrd : (1) 0x81360012 (2) 0x00000012 (3) 0x00000000
(4) 0x00000000 (5) 0x00000000 (6) 0x00000000
sqlwarn : (1) (2) (3) (4) (5) (6)
(7) (8) (9) (10) (11)
sqlstate:

Where should I notice to avoid this kind of error messages coming again?