In Oracle database environments, is a specific error message indicating that a "pluggable database" (PDB) cannot access a file.
: It allows servers to centralize their internal logs (journal entries) on a single remote management server.
: This usually happens when a PDB tries to use the DBMS_BACKUP_RESTORE package to access files it doesn't have permission to reach.
In modern Linux distributions, the systemd-journal-upload service uses by default to send system logs over the network to a remote collector.