<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def mark(self):
 """ Mark the unit of work as failed in the database and update the listener so as to skip it next time. """

        self.reliableListener.lastRun = extime.Time()
        BatchProcessingError(
            store=self.reliableListener.store,
            processor=self.reliableListener.processor,
            listener=self.reliableListener.listener,
            item=self.workUnit,
            error=self.failure.getErrorMessage())