Continous/Repeated Reconnecting & Reconnected toast messages on v0.28.2

[anr2me]

Custom Node Testing

• I have tried disabling custom nodes and the issue persists (see how to disable custom nodes if you need help)

Expected Behavior

No reconnection issue.

Actual Behavior

WebSocket /ws seems to be completed with status 101 within less than 1 second from the time it got connected instead of staying alive/connected, thus causing ComfyUI to repeatedly keeps trying to reconnects.

Steps to Reproduce

This happened on cloud GPU (modal.com) deployed with https://github.com/caru-ini/modal-comfyui using the example models.py and plugins.py

Which install and launch ComfyUI using comfy-cli.

Debug Logs

CONNECT /ws -> 101 Switching Protocols  (duration: 323.1 ms, execution: 194.8 ms)

Other

As seen in the screenshot, ComfyUI Logs can't show any logs because there is no active websocket connection.

While the logs on the container only shows:

CONNECT /ws -> 101 Switching Protocols  (duration: 323.1 ms, execution: 194.8 ms)

[anr2me]

I wondered whether this is something that only happened on cloud GPU behind reverse proxy 🤔 it works fine about a month ago (haven't been using it for a month or more).

[rdanalex]

I don't think this issue is related to comfyui. The same behavior occurs when switching comfyui versions, down to 0.25.0. Have you tried to contact modal?

[anr2me]

I don't think this issue is related to comfyui. The same behavior occurs when switching comfyui versions, down to 0.25.0. Have you tried to contact modal?

I haven't, just wondering whether people who use Runpod/Vast.ai also having similar issue 🤔

[iuza83]

Had the same issue with Modal. It is caused by an open issue in the recent aiohttp package releases (see aio-libs/aiohttp#13274).

As a temporary workaround, you can downgrade your ComfyUI installation to a working aiohttp version

    modal.Image.debian_slim(  #this starts with a basic and supported python version
        python_version="3.12"
    )
    .pip_install("aiohttp==3.14.1")

[anr2me]

Had the same issue with Modal. It is caused by an open issue in the recent aiohttp package releases (see aio-libs/aiohttp#13274).

As a temporary workaround, you can downgrade your ComfyUI installation to a working aiohttp version

modal.Image.debian_slim(  #this starts with a basic and supported python version
    python_version="3.12"
)
.pip_install("aiohttp==3.14.1")

Hmm.. the link you referenced is related to multidict package isn't 🤔

[iuza83]

Had the same issue with Modal. It is caused by an open issue in the recent aiohttp package releases (see aio-libs/aiohttp#13274).
As a temporary workaround, you can downgrade your ComfyUI installation to a working aiohttp version

modal.Image.debian_slim(  #this starts with a basic and supported python version
    python_version="3.12"
)
.pip_install("aiohttp==3.14.1")

Hmm.. the link you referenced is related to multidict package isn't 🤔

Yeah, i messed up the issue link, sorry. Edited with the correct one.

[anr2me]

Btw, since that issue has been closed, we only need to pin aiohttp>=3.15 that have the fix, right? 🤔 instead of using older version like aiohttp==3.14.1

Edit: Oops, the latest version at pypi seems to be 3.14.3 , which still have the bug according to the issue 😅 so it should be aiohttp>=3.14.1,!=3.14.2,!=3.14.3 in case they released the fix later.