Hi Matt,

I'm facing same problem getting lot of this type of messages in db2diag.log file
Also we have just upgraded development environement to DB2 v9 with fixpack4.
Also, both the diagleve and notifylevel set to 3 and 2 respectively and even 2-3 times i started the DAS server.

Messages in my db2diag.log:
####################

2008-04-24-10.48.54.318553+120 I2720731A1193 LEVEL: Info
PID : 3916 TID : 4 PROC : db2acd 0
INSTANCE: dintwik NODE : 000
APPID : *LOCAL.dintwik.080424084855
FUNCTION: DB2 UDB, DRDA Communication Manager, sqljcReceive, probe:30
MESSAGE : ZRC=0x8136001C=-2127167460=SQLZ_RC_NO_CONNECTION, SQLT_SQLJC
"No connection"
DATA #1 : String, 11 bytes
CCI Error:
DATA #2 : unsigned integer, 8 bytes
71
CALLSTCK:
[0] 0xFFFFFFFF7E928D9C __1cQsqljcLogCCIError6FpnKsqljCmnMgr_pkcpnKsqlcc_c ond_Cllll_i_ + 0x1BC
[1] 0xFFFFFFFF7E92032C __1cMsqljcReceive6FpnKsqljCmnMgr__i_ + 0x294
[2] 0xFFFFFFFF7E96E368 __1cVsqljrDrdaArDisconnect6FpnOdb2UCinterface__i_ + 0x608
[3] 0xFFFFFFFF7E39813C sqleUCdisconnect + 0x84
[4] 0xFFFFFFFF7E397DD4 sqleUCappConnectReset + 0x1FC
[5] 0xFFFFFFFF7E745B50 __1cRCLI_sqlDisconnect6FpnPCLI_CONNECTINFO_pnFsqlc a_pnTCLI_ERRORHEADERINFO__h_ + 0x178
[6] 0xFFFFFFFF7E716FB0 SQLDisconnect + 0x818
[7] 0xFFFFFFFF75F6EA54 __1cRhmonSQdDLDisconnect6Fi_h_ + 0x34
[8] 0xFFFFFFFF75FA3DD0 __1cPhiDataCollectorRcollectDBCfgParms6M_v_ + 0x248
[9] 0xFFFFFFFF75F9F358 __1cPhiDataCollectorRupdateRefreshSets6M_i_ + 0x2C0

Thanks in Advance.