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Broker reports ORA-16858: last communication time from redo source could not be determined (Doc ID 2064384.1)

Last updated on OCTOBER 18, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.1 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

NOTE: In the images and/or the document content below, the user information and environment data used represents fictitious data
from the Oracle sample schema(s), Public Documentation delivered with an Oracle database product or other training material.
Any similarity to actual environments, actual persons, living or dead, is purely coincidental and not intended in any manner.

For the purposes of this document, the following fixtitious environment is used as an example to describe the procedure:

Primary Database name:- cdbph2

Standby database names :- cdbphsb2 ,cdbphsb4

 

In a 12c configuration, Broker reports the errors:

ORA-16810: multiple errors or warnings detected for the database
ORA-16858: last communication time from redo source could not be determined

 

DGMGRL> show configuration

Configuration - cdb_t5

Protection Mode: MaxPerformance
Databases:
cdbph2 - Primary database
cdbphsb2 - Physical standby database
cdbphsb4 - Physical standby database
Error: ORA-16685: this database does not receive redo data

Fast-Start Failover: DISABLED

Configuration Status:
ERROR

 

DGMGRL> show database cdbphsb4

Database - cdbphsb4

Role: PHYSICAL STANDBY
Intended State: APPLY-ON
Transport Lag: (unknown)
Apply Lag: (unknown)
Apply Rate: (unknown)
Real Time Query: OFF
Instance(s):
cdbphsb4

Database Error(s):
ORA-16685: this database does not receive redo data

Database Warning(s):
ORA-16858: last communication time from redo source could not be determined

Cause

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In this Document
Symptoms
Cause
Solution


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