ValueError: The future belongs to a different loop when using CPD mode

[LiPingYen]

Description:

When attempting to retrieve cookies in CDP mode using SeleniumBase, I encountered the following error:

ValueError: The future belongs to a different loop than the one specified as the loop argument

Reproducible Example:

from seleniumbase import SB
import nest_asyncio

nest_asyncio.apply()

with SB(uc=True, incognito=True, demo=False) as sb:
    sb.activate_cdp_mode("https://news.google.com/home?hl=en-US&gl=US&ceid=US:en")
    cookies = sb.cdp.get_all_cookies()

Expected Behavior:

Should return a list of cookies from the specified URL without throwing an exception.

Environment:

SeleniumBase version: 4.38.0
Python version: 3.12.10
OS: MacOS 15.4.1
Browser: Chrome 136.0.7103.49 (Official Build) (arm64)

Let me know if additional details or logs are needed. Thanks!

[mdmintz]

I ran your example exactly as written, and I couldn't reproduce your issue.
It's quite possible you've done something outside your code, which is masked by using nest_asyncio.
Make sure issues you've filed contain the full code for reproducing the issue.

[LiPingYen]

Hi @mdmintz, the minimume reproducible code is what I mentioned.
The reason why I use nest_asyncio is because I ran the code in Jupyter notebook.

[mdmintz]

Likely an issue with Jupyter Notebooks, which aren't an officially supported environment.

Jupyter Notebooks have custom event loop code (specifically the event loop policy of the kernel), which is problematic for frameworks that use asyncio.
You could try https://stackoverflow.com/a/76614024/7058266.

[LiPingYen]

Thanks @mdmintz, I will test the solution.

[mdmintz]

You could also try using the SeleniumBase async API: https://github.com/seleniumbase/SeleniumBase/blob/master/help_docs/syntax_formats.md#sb_sf_24

Eg: examples/cdp_mode/raw_async.py

And maybe this format will work too: https://github.com/seleniumbase/SeleniumBase/blob/master/help_docs/syntax_formats.md#sb_sf_25

Eg: examples/cdp_mode/raw_cdp.py

[LiPingYen]

I tested SB CDP Sync API. No Selenium format, and that worked for me.
Just wonder why SB context manager format doesn't not work.

[mdmintz]

It's likely due to the same Jupyter Notebooks bug affecting other frameworks.
At least a workaround exists until Jupyter Notebooks fixes the issue.