Is Solr/Solr cloud is must to access Ranger audit access logs? Any referrence document to configure audit access logs from Oracle DB 12C backend.
Environment with Ambari 2.1.2 and HDP-126.96.36.199-2950
Solr is recommended way to store audit logs.
Save audits to SOLR
check ranger.audit.source.type in Ranger and make sure its set to the method that you want to choose.