线程池问题，求大神解释

String hql="from AUser where delFlag=0";

List<AUser> aUsers= hibernateDaoSysService.findByHql(hql, null);

ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(3);

PingTimeThread thread = new PingTimeThread("2016-04-05",aUsers.subList(0, aUsers.size()),0,aUsers.size());

newFixedThreadPool.execute(thread);
newFixedThreadPool.shutdown();

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System.out.println("aUsers的大小："+aUsers.size());
System.out.println("当前线程为："+Thread.currentThread().getName()+"  数据为："+aUsers.toString());
hibernateDaoSysService = (IHibernateDaoSysService) SpringBeanUtil.getBean("hibernateDaoSysService");
System.out.println("hibernateDaoSysService="+hibernateDaoSysService);
try {
for(int i=0;i<aUsers.size();i++){
AUser aUser = aUsers.get(i);
String userId = aUser.getUserId();
List<Object> params=new ArrayList<Object>();
params.add(userId);
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
java.sql.Date sqlDate=new java.sql.Date(sdf.parse(date).getTime());
params.add(sqlDate);
try {
List<AStatusDetail> aStatuss = hibernateDaoSysService.findByHql("from AStatusDetail where userId=? and dateStatus= DATE_FORMAT(?, '%Y-%m-%d') and delFlag=0", params.toArray());
System.out.println("params=="+params.toString()+"   aStatuss=="+aStatuss.toString());
} catch (Exception e) {
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
}

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问题：List<AStatusDetail> aStatuss = hibernateDaoSysService.findByHql("from AStatusDetail where userId=? and dateStatus= DATE_FORMAT(?, '%Y-%m-%d') and delFlag=0", params.toArray());　我在执行这句的时候，为什么没有结果，切单元测试还能通过？请大神给我看看问题在哪里？