Database Installation and Operation Fails if RemoveIPC=yes Is Configured for systemd
If RemoveIPC=yes is configured for systemd, interprocess communication (IPC) is terminated for a non-system user’s processes when that user logs out. This setting, which is intended for laptops, can cause software problems on server systems. For example, if the user is a database software owner such as oracle for Oracle Database, this configuration can cause database installation to fail or database services to crash.
By default, Oracle Linux 7 Update 2 configures RemoveIPC=no in /etc/systemd/logind.conf to prevent systemd from terminating IPC. However, if you have touched this file before updating your system to Oracle Linux 7 Update 2, the update installs the new version of the file as /etc/systemd/logind.conf.rpmnew and does not set RemoveIPC=no in /etc/systemd/logind.conf.
To avoid database crashes, set RemoveIPC=no in /etc/systemd/logind.conf and run systemctl reboot to reboot the system. (Bug ID 22224874)
Reference Document: ORA-27300 ORA-27301 ORA-27302 ORA-27157 Database Crash (Doc ID 438205.1)
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