Servlet.service() for servlet [hystrix.stream-actuator-endpoint] in context with path [] threw exception java.lang.IllegalArgumentException:null

[lujinghai]

My production environment has been constantly reporting this error, and I suspect it may be related to the fact that Fegin has enabled Hystrix from time to time. I would like to ask for your advice.

[StevenHachel]

Everyone who uses Spring Boot with Hystrix probably gets this error message. And has been doing so for years.
It's a painful and annoying issue for which there doesn't seem to be a solution yet.