ORA-30006: resource busy; acquire with WAIT timeout expired and ORA-00054: resource busy and NOWAIT specified
ORA-30006 and ORA-00054
errors raised when update operation is performed against a record,
that has been locked by the user or some session FOR UPDATE.
To fix this, before performing the update, check
whether the record is locked or not. Simple way to check this is,
select invoice_num into l_invoice_num
where invoice_num = ‘TEST123’
for update skip locked;
<do your update process against the invoice in
<do not perform update>;
The select script will return NO_DATA_FOUND
exception, if invoice number ‘TEST123’ is locked FOR UPDATE and
will exit the update process.