// start a timer to keep an upper time limit to find an empty
	// slot to add the given heal result - if no slot is found it
	// means that the server is holding the maximum amount of
	// heal-results in memory and the client has not consumed it
	// for too long.
	unconsumedTimer := time.NewTimer(healUnconsumedTimeout)
	defer unconsumedTimer.Stop()

	var itemsLen int
	for {