Repeated log messages: "Generating new user for token-authenticated request"

[rmoff]

Description

When running Jupyter with authentication disabled the stdout fills with repeated Generating new user for token-authenticated request messages at a rate of one every ~5 seconds.

[I 2023-05-18 13:19:29.827 ServerApp] Jupyter Server 2.5.0 is running at:
[I 2023-05-18 13:19:29.827 ServerApp] http://a21685c58ba4:8888/lab
[I 2023-05-18 13:19:29.827 ServerApp]     http://127.0.0.1:8888/lab
[I 2023-05-18 13:19:29.827 ServerApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[W 2023-05-18 13:19:31.073 ServerApp] Clearing invalid/expired login cookie username-127-0-0-1-8888
[I 2023-05-18 13:19:31.073 ServerApp] Generating new user for token-authenticated request: f1d7be83beba476eaab4acba6ec92c18
[I 2023-05-18 13:19:34.213 ServerApp] Generating new user for token-authenticated request: 5103b5dff6594e748507a46d7c48b1f1
[I 2023-05-18 13:19:35.359 LabApp] Build is up to date
[I 2023-05-18 13:19:39.403 ServerApp] Generating new user for token-authenticated request: b22f7c9e6ab444f8818936b9ef1c8055
[I 2023-05-18 13:19:44.577 ServerApp] Generating new user for token-authenticated request: 588ca65e85274fda86f513f1202686b3
[I 2023-05-18 13:19:49.724 ServerApp] Generating new user for token-authenticated request: f7a3bc4adb204f3c88fdcad61d9ce314
[I 2023-05-18 13:19:54.904 ServerApp] Generating new user for token-authenticated request: 2f256e6a4d5344c993e316b8c7cb797d
[I 2023-05-18 13:20:00.060 ServerApp] Generating new user for token-authenticated request: 7112348f62784b85bbf7fb0eeeec0fe9
[I 2023-05-18 13:20:05.197 ServerApp] Generating new user for token-authenticated request: 43195969b1474fb2ae84a14b2d605e57
[I 2023-05-18 13:20:10.364 ServerApp] Generating new user for token-authenticated request: c17da5d7cf424aada35c5f55a5c83f9d
[I 2023-05-18 13:20:15.544 ServerApp] Generating new user for token-authenticated request: 5cd36cdac5e6453fb4de9792ca466979
[I 2023-05-18 13:20:20.705 ServerApp] Generating new user for token-authenticated request: ba46f63879244b2eb75f3ff758742f5e
[I 2023-05-18 13:20:25.870 ServerApp] Generating new user for token-authenticated request: 222b913e5b9847e09fa9f8208dc96784
[I 2023-05-18 13:20:31.035 ServerApp] Generating new user for token-authenticated request: affb7ab497e24f068b9dc3114c8678a1
[I 2023-05-18 13:20:36.199 ServerApp] Generating new user for token-authenticated request: a1c2341cf1034a829c48940405b2c8d4
[I 2023-05-18 13:20:41.348 ServerApp] Generating new user for token-authenticated request: 951f8d71f39542068fea3cd3760bc2a2
[I 2023-05-18 13:20:46.514 ServerApp] Generating new user for token-authenticated request: 06e4172f911a4774a762222950b016dd
[I 2023-05-18 13:20:51.684 ServerApp] Generating new user for token-authenticated request: e356d23fa8194b6a828ac2be633cb77d

From what I can tell the functionality of Jupyter is not impacted, but the spam is annoying.

Reproduce

docker run --rm -p 8888:8888 -e  NOTEBOOK_ARGS="--NotebookApp.token='' --NotebookApp.password=''" jupyter/pyspark-notebook:notebook-6.5.3

If you run it without the auth disabled the message doesn't get repeated:

docker run --rm -p 8888:8888 jupyter/pyspark-notebook:notebook-6.5.3

Expected behavior

Don't repeat the message continuously

Context

• Jupyter Server version: 2.5

I have reviewed the other two issues that I could find regarding this.

• jupyter-server v2 generates new user for each request when auth is disabled #1033: this was closed as fixed, but doesn't seem to be fixed [anymore?]
• New anon users generated ad infinitum when using IdentityProvider token #1245: has been diagnosed as a VSCode issue, whereas I am not using VSCode.

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