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When the API service is restarted initially. If I call the API service directly, it works but if I call it through the feign client, I'll see the hystrix fallback message for a few seconds. And If API service is not running when I call it through the zuul, I'll see the following error message:

com.netflix.zuul.exception.ZuulException: Hystrix Readed time out

How can I solve this problem?

Brian Tompsett - 汤莱恩
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sunwoo
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  • Though this particular problem is somewhat well-known, it is in general a good practice to add some stack-trace/code with your these type of questions. Helps in narrowing down the potential causes. – narendra-choudhary Dec 27 '18 at 16:19

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By default, Zuul throws exception when upstream service is not available instead of throwing 503/404. You need to extend ErrorFilter and handle the exception with custom behavior.

That's why when the API service is not running you get ZuulException.

This behavior has been discussed in detail in Zuul swallows 503 exceptions from upstream microservices GitHub thread.

Some of the approaches to deal with this exception is explain in this SO thread: Customizing Zuul Exception.

narendra-choudhary
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