Resolve ORA-00054 Error Message in Oracle

Learn the reason and how to get to the bottom of the ORA-00054 error message in Oracle.


When you come upon an ORA-00054 error, the following error message will appear:

ORA-00054: resource busy and collect with NOWAIT designated


You tried to execute a LOCK TABLE or SELECT FOR UPDATE command with the NOWAIT key-word but the resource was once unavailable.

Or you tried to DROP a COLUMN the usage of the ALTER TABLE command and acquired the error.


The option(s) to resolve this Oracle error are:

Option #1

Wait and attempt the command once more after a few minutes.

Option #2

Execute the command without the NOWAIT keyword.

Option #3

If the error came about whilst attempting to DROP a COLUMN, be positive to backup the data. Then TRUNCATE the desk and execute the DROP COLUMN command again.