ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired ORA-06512: at "APPS.WF_NOTIFICATION", line 5130 ORA-06512: at line 1

Appove Workflow Notification Mailer --

ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired ORA-06512: at "APPS.WF_NOTIFICATION", line 5130 ORA-06512: at line 1

Solution :

select do.owner,do.object_name,do.object_type,dl.session_id,vs.serial#, vs.program,vs.machine,vs.osuser
from dba_locks dl,dba_objects do,v$session vs
where do.object_name ='WF_NOTIFICATIONS' and do.object_type='TABLE' and dl.lock_id1 =do.object_id and vs.sid = dl.session_id;

Issue the command

sql > alter system kill sessions 'sid,serial#' immediate;