Oracle® Database 11g / 12c / 18c error codes ORA-00240: control file enqueue held for more than [string] seconds

ORA-00240: control file enqueue held for more than [string] seconds

Oracle Error Code: ORA-00240

Cause: The current process did not release the control file enqueue within the maximum allowed time.

Action: Reissue any commands that failed and contact Oracle Support Services with the incident information.