Prometheus is unable to scrape fluentd metrics in OpenShift 4

Issue

• All the collector pods are filled with the below logs after skipping the upgrade channel stable-5.3 of the Red Hat OpenShift Logging operator:

  2023-03-21 06:06:12 +0000 [error]: #<Async::Task:0x2aa1c (failed)>SSL_accept returned=1 errno=0 state=error: sslv3 alert bad certificate
  2023-03-21 06:06:19 +0000 [error]: #<Async::Task:0x2ad3c (failed)>SSL_accept returned=1 errno=0 state=error: sslv3 alert bad certificate
  

• Below alert is streaming in the cluster:

  Login -> Administrator View -> Observe -> Alerting
  ---
  Prometheus could not scrape fluentd collector for more than 10m.
  

• The endpoints of collector pods shows down in Targets section.