def trace_parser(self):
        """Method that parses the trace file once and updates the
        :attr:`status_info` attribute with the new entries.
        """

        # Check the timestamp of the tracefile. Only proceed with the parsing
        # if it changed from the previous time.
        size_stamp = os.path.getsize(self.trace_file)
        self.trace_retry = 0
        if size_stamp and size_stamp == self.trace_sizestamp:
            return
        else:
            logger.debug("Updating trace size stamp to: {}".format(size_stamp))
            self.trace_sizestamp = size_stamp

        with open(self.trace_file) as fh:

            # Skip potential empty lines at the start of file
            header = next(fh).strip()
            while not header:
                header = next(fh).strip()

            # Get header mappings before parsing the file
            hm = self._header_mapping(header)

            for line in fh:

                # Skip empty lines
                if line.strip() == "":
                    continue

                fields = line.strip().split("\t")

                # Skip if task ID was already processes
                if fields[hm["task_id"]] in self.stored_ids:
                    continue

                # Parse trace entry and update status_info attribute
                self._update_trace_info(fields, hm)
                self.send = True

        self._update_process_stats()
        self._update_barrier_status()
Method that parses the trace file once and updates the
        :attr:`status_info` attribute with the new entries.