Monitor System Log and send email when exception occurs

What is the best / easiest way to monitor the jenkins system log and send an email when something happens. eg: An exception in the core or a plugin that shouldn’t happen.

We have been getting exception in the SVN polling request sent by our svn server. An exception gets thrown when jenkins tries to determine if a job has changes for some reason. As jenkins seems to iterate thru all jobs in sequence to do this check, Something wrong with one job stops all subsequent jobs in it’s list from getting checked. It takes a while to notice some jobs aren’t getting triggered, and then to figure out why.

The only sign of something wrong, is in the jenkins system log.
And not everyone access jenkins has access to that.
So early notification of the error would be beneficial.

Phil