请问这个是我单测写的有问题吗？我限流设置的是1，但是多线程访问进入了线程数的请求。

正常我的理解只会打印一个helloword
/**
* 初始化流控规则
*/
private static void initFlowRules() {

List rules = new ArrayList();
FlowRule rule1 = new FlowRule();
rule1.setResource("HelloWorld");

ClusterFlowConfig config = new ClusterFlowConfig();
config.setFallbackToLocalWhenFail(true);
config.setSampleCount(10);
config.setThresholdType(0);
config.setWindowIntervalMs(1000);
rule1.setClusterConfig(config);
// set limit qps to 20
rule1.setCount(1);
rule1.setStrategy(0);
rule1.setClusterMode(false);
rule1.setControlBehavior(0);
rule1.setGrade(RuleConstant.FLOW_GRADE_QPS);
rule1.setLimitApp("default");
rules.add(rule1);
FlowRuleManager.loadRules(rules);
}

@Test
public void flowRule_TEST() throws InterruptedException {

// 配置规则.
initFlowRules();

for (int j = 0; j < 4; j++) {
new Thread(new Runnable() {
int i = 0;

@Override
public void run() {
for (int k = 0; k < 30; k++) {
// 1.5.0 版本开始可以直接利用 try-with-resources 特性 自动回收调用 entry.exit() 配合注解使用 @SentinelResource("HelloWorld")
try (Entry entry = SphU.entry(
"HelloWorld",
EntryType.IN)) {
// 被保护的逻辑
System.out.println(Thread.currentThread().getId() + "hello world" + (++i));

} catch (BlockException ex) {
i++;
// 处理被流控的逻辑
System.out.println("blocked!");

}
}

}
}).start();

}
Thread.sleep(500000000);
}
打印日志
25hello world1
24hello world1
26hello world1
23hello world1
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!
blocked!