Sorry, that's a mistake in the documentation. We were going to try to make rsyslog the default for Solaris 11.4, but hit some issues in the integration with Solaris that weren't resolved in time and had to defer that to a later release. The documentation should be corrected in the next refresh. You can still manually disable the system-log:default service and enable the system-log:rsyslog one if you want to test it out yourself.
Which isses btw?
I don't have the full list, but the ones I know of include:
- Bug 26223133 - panic messages are not saved to messages file when using rsyslogd
- Bug 22900525 - rsyslogd jumbles up reboot messages with the current boot messages
- Bug 25219256 - rsyslogd is printing old messages from earlier boot during cluster node boot-up
- Bug 24573208 - rsyslog replaces control characters to #<3 octal numbers>