Concurrent Request Log file - job status

For a long running job kicked off as a Concurrent single request, I would like to look into the concurrent manager log to see how far the job is, based on the log messages written to the log file, it looks like it is not possible, because the Concurrent manager does not release the log file until the job is complete. Is there a way to do this ?

The same long running job when invoked from sqlplus generates a log that I can "tail" to check the progress. The code uses fnd_file.put_line. Not sure how to implement it, so that I can check the Concurrent job request log file while the job is running.