resource busy and acquire with NOWAIT specified: TRUNCATE TABLE "USERS"

SQL> select session_id from v$locked_object;

SESSION_ID---------- 43

SQL> SELECT sid, serial#, username, osuser FROM v$session where sid = 43;

SID SERIAL# USERNAME---------- ---------- ------------------------------OSUSER------------------------------ 43 8907 SXITISMGtssx

SQL> ALTER SYSTEM KILL SESSION '43,8907';

System altered.