After migrating the Confluce database from Oracle11g to Oracle18c, the service has stopped after a few minutes of normal execution. The oracle driver used is version 21 (ojdbc8.jar)
Configuration has been adjusted to increase heap memory to 4 GB, threads to a maximum of 200 and hibernate connections to 60. All plugins were disabled, except UPM. These actions were unsuccessful.
Nothing related to the service crash appears in the log.