'Minact-scn: Useg Scan Erroring Out With Error E:12751' and Error 'ORA-16146: control file enqueue unavailable'
Last updated on JANUARY 16, 2018
Applies to:Oracle Database - Enterprise Edition - Version 22.214.171.124 and later
Information in this document applies to any platform.
- Alert log shows error 'Minact-scn: Useg Scan Erroring Out With Error E:12751'
- Hanganalyze shows CF is blocking:
HANGANALYZE at 2018-01-08 12:03:32
Main chain/s seen (if any):
HA 1 Chain 1 Signature: control file parallel write<=enq: CF - contention<=buffer busy waits blocking 42 sessions
HA 1 Chain 2 Signature: direct path sync<=enq: TX - row lock contention blocking 2 sessions
HA 1 Chain 3 Signature: direct path sync<=enq: TX - row lock contention blocking 0 sessions
HA 1 Chain 4 Signature: direct path sync<=enq: TX - row lock contention blocking 0 sessions
- Also there is control file enqueue unavailable error:
ORA-16146: control file enqueue unavailable : control file enqueue unavailable
- Standby database has following errors:
ORA-16040: Destination archive log file is locked.
ORA-16055: FAL request rejected
Resized overflow buffer to 12375K (for 12375K LWN)
FAL[server]: Selected inactive destination; resetting temporarily
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