Heap Error but job status still 'SUCCESS'. How to capture the error

Hi All,

We have scheduled our kettle jobs using hudson where we get email notification if final exist state of the job is 'FAILURE'
Yesterday I see that job had a java heap size error in between but at the end it still says 'Job Completed successfully' ( and no error email was sent)

If we try to capture anytime a step in the job gives 'ERROR', we get so many email.

So if a job or ktr has a failure somewhere during execution but still the completion status is 'SUCCESS', what might be the best way to capture this ?
One option that I can think is scanning the execution log file after job is complete. If anywhere there is a ERROR word in the log, then send an email for error notification

Thanks