"counter.scheduler.operation.allocate");
schedulerHandleCounter = metrics.counter(
"counter.scheduler.operation.handle");
schedulerHandleCounterMap = new HashMap<SchedulerEventType, Counter>();
for (SchedulerEventType e : SchedulerEventType.values()) {
Counter counter = metrics.counter(
"counter.scheduler.operation.handle." + e);
schedulerHandleCounterMap.put(e, counter);
}
// timers for scheduler operations
int timeWindowSize = conf.getInt(