Description:
The log format to the syslog is changed as described by this ticket. In case it's documented what go in the syslog it should update and include the log component.
Engineering Ticket Description:
Starting from v3.0, mongodb logs an event with component name to log file using MessageEventDetailsEncoder, in contrast with syslog which using MessageEventWithContextEncoder.
I think we can use component name to filter some less useful log entries. It would be better if mongodb could log component name to syslog too.