Memory leak when I get the error "Request body larger than maxBodyLength limit"

[jose-lopes]

Describe the bug

I observe a memory leak when I request a file and pipe to another request and I get the error "Request body larger than maxBodyLength limit"

To Reproduce

To reproduce the problem, I request a file of 20MB and pipe to another request.
Bellow there a sample code:

const optsGetFile = {
  method: "get",
  url: "http://localhost:7001/download",
  responseType: "stream",
};
const optsUploadFile = {
  method: "post",
  url: "http://localhost:7001/upload",
};

axios(optsGetFile)
  .then(({ headers, data }) => {
    return axios(_.assign(optsUploadFile, { data, headers }));
  })

The entire test code is present at https://github.com/jose-lopes/test_axios .
Next I will describe the environment that I setup to reproduce the problem.

• Start fake server. (This program serve /upload and /download (20MB) requests)

node test_fakeserver.js

• Start test server and monitor memory with memory-profiler. (This program serve /record request, which it get /download and post to /upload)

mprof run node test.js

• execute 20 /record requests with interval of 30 seconds

for test in $(seq 1 20); do curl -X POST localhost:7000/record; sleep 30; done

• Stop test server and execute mprof plot to check memory behavior.

mprof plot

Expected behavior

I expected no memory leak even when we got the error "Request body larger than maxBodyLength limit".
I executed again the test server with option maxBodyLength: 3010241024 and I got no memory leak.

Environment

• Axios Version: 0.21.0
• Node.js Version: v14.15.0
• OS: Arch Linux

Additional context/Screenshots

Graph when I execute to reproduce:

[isvidler]

Has a solution been found or implemented? I'm experience the same error when using Axios (Node) with FormData (https://github.com/form-data/form-data).

[jasonsaayman]

Please check if this has been fixed with #3694

[misos1]

This is duplicate of #3460.