That problem faced me now, My OS is Version 12.2(55)SE7.
Log:
%AAA-3-DROPACCTFAIL: Accounting record dropped, send to server failed: system
.07:09:05.660: %SNMP-5-COLDSTART: SNMP agent on host is undergoing a cold start
It was acted itself , rebooted,
HOW RESOLVE THE MY PROBLEM?