Gateway 访问超时 返回504

问题梳理

【现象】Gateway访问超时

{
    "timestamp": "2019-06-29 11:45:13",
    "path": "/admin/user/info",
    "status": 504,
    "error": "Gateway Timeout",
    "message": "Response took longer than configured timeout"
}

【方法】 根据出错位置查看源代码，

AbstractCommand-><br> HystrixObservableTimeoutOperator-><br> final Reference<TimerListener> tl = HystrixTimer.getInstance().addTimerListener(listener);<br>

1. 看到有时间监听类

public Reference<TimerListener> addTimerListener(final TimerListener listener) {
        startThreadIfNeeded();
        // add the listener

        Runnable r = new Runnable() {

            @Override
            public void run() {
                try {
                    listener.tick();
                } catch (Exception e) {
                    logger.error("Failed while ticking TimerListener", e);
                }
            }
        };

        ScheduledFuture<?> f = executor.get().getThreadPool().scheduleAtFixedRate(r, listener.getIntervalTimeInMilliseconds(), listener.getIntervalTimeInMilliseconds(), TimeUnit.MILLISECONDS);
        return new TimerReference(listener, f);
    }

2.找到关键点

listener.getIntervalTimeInMilliseconds()

3.接着看lister的实现

@Override
        public int getIntervalTimeInMilliseconds() {
            return properties.timerDelayInMilliseconds().get();
        }

4.找到properties关键类

HystrixCollapserProperties

5.终于找到了关键属性

timerDelayInMilliseconds

 protected HystrixCollapserProperties(HystrixCollapserKey key, Setter builder, String propertyPrefix) {
        this.maxRequestsInBatch = getProperty(propertyPrefix, key, "maxRequestsInBatch", builder.getMaxRequestsInBatch(), default_maxRequestsInBatch);
        this.timerDelayInMilliseconds = getProperty(propertyPrefix, key, "timerDelayInMilliseconds", builder.getTimerDelayInMilliseconds(), default_timerDelayInMilliseconds);
        this.requestCacheEnabled = getProperty(propertyPrefix, key, "requestCache.enabled", builder.getRequestCacheEnabled(), default_requestCacheEnabled);
        this.metricsRollingStatisticalWindowInMilliseconds = getProperty(propertyPrefix, key, "metrics.rollingStats.timeInMilliseconds", builder.getMetricsRollingStatisticalWindowInMilliseconds(), default_metricsRollingStatisticalWindow);
        this.metricsRollingStatisticalWindowBuckets = getProperty(propertyPrefix, key, "metrics.rollingStats.numBuckets", builder.getMetricsRollingStatisticalWindowBuckets(), default_metricsRollingStatisticalWindowBuckets);
        this.metricsRollingPercentileEnabled = getProperty(propertyPrefix, key, "metrics.rollingPercentile.enabled", builder.getMetricsRollingPercentileEnabled(), default_metricsRollingPercentileEnabled);
        this.metricsRollingPercentileWindowInMilliseconds = getProperty(propertyPrefix, key, "metrics.rollingPercentile.timeInMilliseconds", builder.getMetricsRollingPercentileWindowInMilliseconds(), default_metricsRollingPercentileWindow);
        this.metricsRollingPercentileWindowBuckets = getProperty(propertyPrefix, key, "metrics.rollingPercentile.numBuckets", builder.getMetricsRollingPercentileWindowBuckets(), default_metricsRollingPercentileWindowBuckets);
        this.metricsRollingPercentileBucketSize = getProperty(propertyPrefix, key, "metrics.rollingPercentile.bucketSize", builder.getMetricsRollingPercentileBucketSize(), default_metricsRollingPercentileBucketSize);
    }

Gateway的超时是经过Hystrix的属性控制的Orz

方向错了，赶忙换个方向<br> https://www.cnblogs.com/520playboy/p/8074347.html

总结

一直想找Gateway的属性，试了半天，网上各类找都没找到，最后仍是经过看源码，发现方向错误了，调整方向，bingo.