spring cloud hystrix timeouts

最新推荐文章于 2024-05-13 13:42:02 发布

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本文详细解析了Spring Cloud中Hystrix超时时间的配置逻辑，包括默认超时时间、具体服务超时时间及与Ribbon超时时间的关系。强调了具体服务超时时间的优先级高于默认超时时间，且两者都高于Ribbon超时时间。

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spring cloud hystrix timeouts

protected static int getHystrixTimeout(IClientConfig config, String commandKey) {
    int ribbonTimeout = getRibbonTimeout(config, commandKey);
    DynamicPropertyFactory dynamicPropertyFactory = DynamicPropertyFactory.getInstance();
    
    // 获取默认的hytrix超时时间
    int defaultHystrixTimeout = dynamicPropertyFactory.getIntProperty("hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds",
        0).get();
    // 获取具体服务的hytrix超时时间，这里应该是hystrix.command.foo.execution.isolation.thread.timeoutInMilliseconds
    int commandHystrixTimeout = dynamicPropertyFactory.getIntProperty("hystrix.command." + commandKey + ".execution.isolation.thread.timeoutInMilliseconds",
        0).get();
    int hystrixTimeout;
    // hystrixTimeout的优先级是 具体服务的hytrix超时时间 > 默认的hytrix超时时间 > ribbon超时时间
    if(commandHystrixTimeout > 0) {
        hystrixTimeout = commandHystrixTimeout;
    }
    else if(defaultHystrixTimeout > 0) {
        hystrixTimeout = defaultHystrixTimeout;
    } else {
        hystrixTimeout = ribbonTimeout;
    }
    // 如果默认的或者具体服务的hytrix超时时间小于ribbon超时时间就会警告
    if(hystrixTimeout < ribbonTimeout) {
        LOGGER.warn("The Hystrix timeout of " + hystrixTimeout + "ms for the command " + commandKey +
            " is set lower than the combination of the Ribbon read and connect timeout, " + ribbonTimeout + "ms.");
    }
    return hystrixTimeout;
}