fix AutoDownGradeByOverTime

@@ -14,21 +14,21 @@ import com.yoho.search.service.downgrade.IDowngrade;
  */
 public class AutoDownGradeByOverTime implements IDowngrade {
 
-	private ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
+	private ScheduledExecutorService scheduledExecutorService;
 	private AtomicInteger overTimeCount = new AtomicInteger(0);// 当前超时次数
 	private int overTimeThreshold;// 超时次数阀值
+	private int lastPeroidOverTime = 0;// 上一个时间段的超时次数
 
-	private int lastPeroidOverTime = 0;//上一个时间段的超时次数
-
-	public AutoDownGradeByOverTime(int periodInSecond,TimeUnit timeUnit,int overTimeThreshold) {
+	public AutoDownGradeByOverTime(int periodInSecond, TimeUnit timeUnit, int overTimeThreshold) {
 		this.overTimeThreshold = overTimeThreshold;
+		scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
 		scheduledExecutorService.scheduleAtFixedRate(new ClearOverTimeCount(), 1, periodInSecond, timeUnit);
 	}
 
 	@Override
 	public boolean needDowngrade() {
 		int overTime = Math.max(lastPeroidOverTime, overTimeCount.intValue());
-		return overTime> overTimeThreshold;
+		return overTime > overTimeThreshold;
 	}
 
 	@Override