由于客户端请求服务端方法时，服务端方法响应超过1秒将会触发降级，所以我们可以配置Hystrix默认的超时配置

如果我们没有配置默认的超时时间，Hystrix将取default_executionTimeoutInMilliseconds作为默认超时时间

this.executionTimeoutInMilliseconds = getProperty(propertyPrefix, key, "execution.isolation.thread.timeoutInMilliseconds", builder.getExecutionIsolationThreadTimeoutInMilliseconds(), default_executionTimeoutInMilliseconds)

1.代码中修改默认超时配置（改为3秒）：

@HystrixCommand(commandProperties = {     @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",value = "3000")}) public String serverMethod() {
     　　return null; }

2.application.properties中设置默认超时时间：

1.默认：（方法上记得要加上@HystrixCommand，否则无效）：hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=30002.配置具体方法的超时时间hystrix.command.serverMethod.execution.isolation.thread.timeoutInMilliseconds=3000

3.启动类：

package com.wangfajun;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.client.SpringCloudApplication;import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;import org.springframework.cloud.client.discovery.EnableDiscoveryClient;//@SpringBootApplication//@EnableDiscoveryClient//@EnableCircuitBreaker //开启断路器@SpringCloudApplicationpublic class FajunClientTestApplication {    public static void main(String[] args) {        SpringApplication.run(FajunClientTestApplication.class, args);    }}

4.pom:

     
     
      　　
      
       org.springframework.cloud
      　　
      
       spring-cloud-starter-hystrix