During database Auto Discovery of an Oracle RAC instance, the StealthCollect agents detect intermittently or not at all instances.
Load balanced (RAC) instances require specific configuration for the auto detect process.
Follow the steps in the attached document.
Search terms ODB-2985
middleware autodiscovery PA Performance Analysis agent detection sometimes flips randomly "stealthcollect not detected" "connection to stealthcollect failed" DB_oracle_rac_instance