Different socket connection behaviour between Nodejs 18 and Nodejs 20

[lamhoangpham20]

Node.js Version

v20.16.0

NPM Version

v10.8.1

Operating System

Darwin macOS ARM64

Subsystem

http

Description

I have stress-tested my NodeJS server in Nodejs 18 and Nodejs 20 with Locust and I received ConnectionResetError with v20 but not v18. Is there any workaround with this issue

Minimal Reproduction

Condition:

• Server is running with Express Nodejs
• 2000 concurrent requests per second
• HTTP protocol
• The logic behind the API route has asynchronous functions.

Output

Result:

• When testing against the express server running in NodeJS 20, about 1% of the requests got ConnectionResetError(54, 'Connection reset by peer') error in Locust.
• When testing against the express server running in NodeJS 18, there is no error found from the client request

I also try to configure the keepalivetimeout in express but there is no difference.

With Nodejs v20

With Nodejs v18

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