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).