On Tue Mar 01 22:23:36 2016, dmrz@illinois.edu wrote:
> Hi Shawn,
> 
> Thanks very much for the quick and informative response!  I look forward
> to seeing fixes in 4.3.5.
> 
> David
> 
> P.S.  Limiting the frequency of pings to the same target makes perfect
> sense to me; perhaps an easy solution would be to perform the same
> recently-used check before deciding to reclaim a particular abandoned
> lease in the first place (i.e. if the lease was marked abandoned so
> recently that we wouldn't be willing to ping it again yet, then we don't
> attempt to reclaim it at all).
> 
We can consider that as an option.  Part of the problem is the nature
of the testing we both did.  In the test there is only a very small number
of leases and the are all abandoned.  In this case the serve has two bad
options - don't hand out a lease or try to reuse an abandoned lease - which
is worse is somewhat dependent on the rest of your set up.

In a more normal situation with a larger number of leases this occurrence
is less likely.