Hmm yes, I checked it but it doesnt say much ...
2012-01-30-08.54.06.923572+060 I134185A500 LEVEL: Error
PID : 1810514 TID : 1 PROC : db2flacc
INSTANCE: db2inst6 NODE : 000
EDUID : 1
FUNCTION: DB2 UDB, bsu security, sqlexLogPluginMessage, probe:20
DATA #1 : String with size, 213 bytes
LDAP WhoAmI: can't determine LDAP user associated with
OS user 'db2inst6': LDAP error while searching for AuthID.
Userid attribute='uid' AuthID attribute='uid'
user objectClass='SVCaixLDAPReader' user base DN=''
2012-01-30-08.54.06.923733+060 E134686A690 LEVEL: Severe
PID : 1810514 TID : 1 PROC : db2flacc
INSTANCE: db2inst6 NODE : 000
EDUID : 1
FUNCTION: DB2 UDB, bsu security, sqlexGetDefaultLoginContext, probe:150
MESSAGE : ADM13001E Plug-in "IBMLDAPauthclient" received error code
"-1" from the DB2 security plug-in API "db2secGetDefaultLoginContext"
with the error message "LDAP WhoAmI: can't determine LDAP user
associated with OS user 'db2inst6': LDAP error while searching for
AuthID. Userid
attribute='uid' AuthID attribute='uid' user
objectClass='SVCaixLDAPReader' user base DN=''".