Here it invoke fallback method as we have configured 1000 ms for timeout and in getData method we have explicitly add delay of 1200 ms using Thread.sleep(1200). For some first requests, you receive a fallback response from Hystrix. and throwing … Hello, I am getting this exception even though the fallback method signature is same as actual method. private String fallback_hello() { return "Request fails. We can see success, timeout, and failed percentages. Hi, Once application started, 1st request is falling into hystrix fallback method within/before the preConfigured timeout: (execution.isolation.thread.timeoutInMilliseconds : 12000). It takes long time to response"; } The complete Rest Controller class file that contains REST API and Hystrix properties is shown here − Hystrix Circuit Breaker, getting failure exception in fallback method; Hystrix Circuit Breaker, Setting Configuration Properties Using @HystrixProperty; Circuit Breaker, Specifying Hystrix configuration in application.properties file; Circuit Breaker Hystrix, concurrent requests and default thread pool size Hystrix Health stats. Circuit Breaker Design Pattern Using Netflix Hystrix — Hystrix Application, Circuit Breaking With Hystrix, fallback methods, configuration. Next, define the fallback method fallback_hello() if the request takes a long time to respond. Hystrix circuit breaker and fallback will work for delayed instances of account service. Hystrix circuit breaker and fallback will work for delayed instance of account service. So in this way, we can build fault-tolerant microservices using Hystrix. You can change url for restTemplate.getForObject method and test it for fallback. String threadPoolKey default ""; /** * Specifies a method to process fallback logic. Also related information regarding thread pools. Due to default time out always the fallback method is getting called. STS also does not recognise these properties. Here we can see all the details related to the method we have implemented a fallback mechanism. * properties are not taking effect. hystrix.command. If we remove Thread.sleep(1200) from code than output will be as follow. For some first requests, you receive a fallback response from Hystrix. * A fallback method should be defined in the same class where is HystrixCommand. This allows the REST service to restore itself if it was getting too much traffic. * for example: * < code > * @HystrixCommand(fallbackMethod = "getByIdFallback") The challenge presented before us was to migrate the core ordering application from Ruby to Java (Spring Boot). 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