void acquireTimedOut(boolean reentry, ActiveInterval acquireInterval) {
        acquireInterval.close();
        if (reentry) return;
        acquireTimedOutCount.incrementAndGet();
        cumulativeAcquireTimedOutCount.incrementAndGet();
    }
Returns a Runnable that must be invoked when the acquire() finishes.
zkfacade/src/main/java/com/yahoo/vespa/curator/stats/LockMetrics.java