kErrorUnknown

[Raymond Camden]

I've got a dumb little demo that's having an odd result - consistently. 

The idea was a 'fake' social media site for cats where each post content is generated by the Prompt API. 

On the application starting, I get 10 of these and every time I run it I see the same thing.

In the first iteration, it works perfectly.

In the second, I get: 

UnknownError: An unknown error occurred: kErrorUnknown

getPostContent @ app.js:158
await in getPostContent
loadFeed @ app.js:207
await in loadFeed
(anonymous) @ app.js:227

And then it runs iterations 3-10 just fine. That leads me to think it's my fault somewhere, but the kErrorUnknown seems weird.

You can run it here: https://cfjedimaster.github.io/webdemos/scratchingpost/

And the source is here: https://github.com/cfjedimaster/webdemos/tree/master/scratchingpost

To be clear, there's some cleanup the app needs, but running 10 calls one after the other shouldn't be a problem I'd assume... right? (And yeah, eventually I need to clone the initial session but again, with 10 iterations I didn't expect an issue.)

[Kenji Baheux]

Hi Raymond,

As a human currently supervised by a cat, I feel personally targeted by this brilliant demo and your report 😅.

It turns out I had a similar issue with my YNAB receipt porter: live version (tuned for JP receipts), github. In the original version, I just kicked prompts for each receipt and let the browser manage the queue. Recently, however, I started getting errors for some of the receipts while others worked fine.

The team filed a bug report and would love more details and repros.

I added your feedback to the bug report.

In the meantime, you may want to manage your own queue. In my case, I changed the code to process one prompt at a time but it's possible that the issue only triggers after more than x prompts are in the browser queue.

If you have the time to test a self managed queue, let us know if there is a threshold where the error always occurs.

Thanks again for building such a fun project, and for the feedback!

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Product Manager - Chrome

Google Japan

[Thomas Steiner]

I shared this with Kenji as well, so likewise can share it further. I keep a bookmark to this deep-link for a `limit()` function that lets you specify n tasks that should be run in parallel. Here's a quick no-frills demo that shows this in action (open the console). Try playing with different `maxTasks` values.  

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/chrome-ai-dev-preview-discuss/CADWWn7XHn%3Dh8p-5LXD29vgw3xUtFgOyUND1zFc27CxEQLoA8og%40mail.gmail.com.

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Thomas Steiner, PhD—Developer Relations Engineer (blog.tomayac.com, toot.cafe/@tomayac)

Google Spain, S.L.U.

Torre Picasso, Pl. Pablo Ruiz Picasso, 1, Tetuán, 28020 Madrid, Spain

CIF: B63272603

Inscrita en el Registro Mercantil de Madrid, sección 8, Hoja M­-435397 Tomo 24227 Folio 25

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0fjumBl3DCharaCTersAttH3b0ttom.xKcd.cOm/1181.

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[Raymond Camden]

To be clear though, I'm running the prompts sequentially, not in parallel. (It would be better for the initial feed to get all 10 at once, but I started simple.)

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===========================================================================
Raymond Camden

Email : raymon...@gmail.com
Blog : www.raymondcamden.com

[Raymond Camden]

FWIW, brand new machine, first time it downloaded the prompt model, I'm not getting the error at all. 

[Thomas Steiner]

Got it, thanks, Ray! If you find a reproducible case, please file a new bug report and let us know the URL here, so I can help triage and people interested/affected can star the bug.

Cheers,

Tom

[Алла Цис]

Дякую, Томасе та Кенджі, за ваші міркування.

Хоча я запускаю запити послідовно (не паралельно), я схиляюся до думки Кенджі, що проблема все ж таки може бути пов'язана з тим, як браузер керує внутрішньою чергою Prompt API. Можливо, незважаючи на послідовний виклик, друга ітерація потрапляє у певну точку насичення черги, перш ніж перша повністю завершується.

Я продовжу спостерігати за поведінкою. Якщо помилка знову з'явиться, я спробую керувати власною чергою, щоб перевірити цю гіпотезу, і подам новий звіт, як ви просили.Варіант 2: Фокус на відсутності відтворення помилки

пн, 8 черв. 2026 р., 10:47 користувач 'Thomas Steiner' via Chrome Built-in AI Early Preview Program Discussions <chrome-ai-dev-...@chromium.org> пише:

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/chrome-ai-dev-preview-discuss/CALgRrLnuiKiBNMahmA%2B%2BwEAx25sFS50zfJguP3ERocCFd%2B5vrg%40mail.gmail.com.