A bus stall of a few seconds made a renewal time out, and the controller
called that a lost lease, exited and raised the urgent lease-lost alert,
though no other controller could take a key that still lived. Now only
another holder seen, or the key's TTL passed unrenewed, loses the lease;
new acts stop at half the TTL unrenewed and resume on the next renewal
(novox/hq issue 477).
jochen