从RAC环境恢复的备库报警日志中有:Warnings WARNING: Clusterware is not configured - 重庆思庄Oracle、KingBase、PostgreSQL、Redhat认证学习论坛

Alert Log Warnings WARNING: Clusterware is not configured After Switchover. (Doc ID 2807142.1)

In this Document
Symptoms
Changes
Cause
Solution
References

Applies to:
Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Information in this document applies to any platform.
Symptoms
Primary is Rac (2 node or 4 node)
Standby is Standalone none Rac.

Switchover was performed  and Original primary is Standby and Original Standby is now New Primary

Alert log of new Primary continuously throws

WARNING: Clusterware is not configured.
WARNING: Clusterware is not configured.
WARNING: Clusterware is not configured.

Changes

Cause
This is an Expected Behavior as the Old Standby and new Primary is Standalone and Non Rac.

So when it receives information about the other thread the background process CKPT and LGWR would disable those threads internally.
Once this change gets propagated to new Standby these Message will not longer be shown after few minutes.


Redo thread 2 internally disabled at seq 2222 (CKPT) =============> it detects there is a thread 2 enabled and disables it
Wed Sep 08
WARNING: Clusterware is not configured.
WARNING: Clusterware is not configured.
Solution

These Messages are Ignorable and will disappear once the disable thread information is propogated to new Standby.

You can query v$thread on primary and standby to confirm the same

  select THREAD#, STATUS, ENABLED ,    GROUPS INSTANCE,open_time from v$thread;

  THREAD# STATUS ENABLED    GROUPS INSTANCE                            OPEN_TIME
---------- ------ -------- ---------- ----------------------------- -------------- ---------- ------------------ --------- -------------- --------- --------------- --------- ------------------- -----
      1 OPEN       PUBLIC                6       <name >                         08-SEP-21
      2 CLOSED    PUBLIC             6    UNNAMED_INSTANCE_2