Today I requested that while dropping user request hanged after some time. Let`s to check: -bash-3.00$ sqlplus "/as sysdba" SQL*Plus: Release 11.1.0.7.0 - Production on Wed Oct 23 15:52:36 2013 Copyright (c) 1982, 2008, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options SQL> drop user fcjlive cascade; Checking alert log --checking alertlog -bash-3.00$ tail -50 alert_PROD.log ORA-12012: error on auto execute of job 3149 ORA-01435: user does not exist Wed Oct 23 16:02:19 2013 Errors in file /u01/app/oracle/diag/rdbms/prod/PROD/trace/PROD_j000_20447444.trc: ORA-12012: error on auto execute of job 3149 ORA-01435: user does not exist Wed Oct 23 16:04:19 2013 Errors in file /u01/app/oracle/diag/rdbms/prod/PROD/trace/PROD_j000_20447450.trc: ORA-12012: error on auto execute of job 3149 ORA-01435: user do...