Problem:
If profiling has been enabled, during a regular shutdown the profiler is not turned off. This leads to profiling information that cannot be used by google-pprof because of an incomplete file writes.

Solution:
As part of the regular shutdown process call ::ProfilerStop() from dbexit().

This would preserve any profile collection that may have been running and this avoid the "darn it, did not stop the profiling before I terminated the mongod process".