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Consul error report: TooManyRequests: Your IP is issuing too many concurrent...

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Requirements: When building microservices architecture projects, consul acts as middleware for service registration and discovery. In cases of high concurrency, services first obtain each other's IP addresses and ports through consul, but consul middleware throws too many request exceptions.

Unexpected response, status code TooManyRequests: Your IP is issuing too many concurrent connections, please rate limit your calls

HTTPMaxConnsPerClient

The default value is 200, this parameter is used to limit the number of concurrent TCP connections that a single client IP address can open simultaneously to the Consul Agent's HTTP(S) server.

You can view it via the API interface:http://127.0.0.1:8500/v1/agent/self, as shown in the figure below:



Try to shrink HTTPMaxConnsPerClient to reproduce concurrency issues, with the following startup parameters:

Test code using C#:
As shown below:



In a Linux environment, use nohup to start consul and set up the parameters. The command is as follows:


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