Error code

Oracle ORA-00054

ORACLEORA-00054
Database Error Code· An error code returned by a database server such as PostgreSQL or MySQL.

What it means

resource busy and acquire with NOWAIT specified — lock unavailable.

How to fix it

  1. Remove the NOWAIT clause to allow the statement to wait for the lock.
  2. Identify the blocking session in V$SESSION and V$LOCK and commit or roll back its transaction.
  3. Retry the operation after the blocking transaction finishes.

Not affiliated with Oracle. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.