Error opening new comm

[bollwyvl]

With the 6.19.x line, i'm seeing this in this gist.

Rolling back to 6.17.1 does not show this behavior.

The target_name: "comm" is suspect. Having a further look, but this seemed like a useful minimum reproducer to explore further.

[bollwyvl]

Some more data:

• with 6.17.x, creating the slider results in 3 comm_open messages
  • all have the jupyter.widget target
• with 6.19.x, the same generates 6 comm_open messages
  • 3 with comm target
  • 3 with jupyter.widget target

[maartenbreddels]

Ouch, hope I don’t have to eat my laptop.
weird, because we had multiple confirmations 6.19.2 made widgets work.

[bollwyvl]

yeah, dunno... but can confirm that pinning to !=6.19.* has unbroken some of my downstream CI jobs.

[maartenbreddels]

Happy to take another look after the weekend, thanks for reporting!

[maartenbreddels]

Sorry for this, this is caused a lot of pain already.

[maartenbreddels]

@bollwyvl I think this is fixed in #1056 (comment) but I am not sure, since I cannot reproduce this :(

Could you try running that branch? Or maybe you have ideas on how to reproduce this locally.

[bollwyvl]

I've updated the gist with a git+https pointer to the head of that branch, and no longer see the problem. 🎉

[bollwyvl]

I'm seeing some more issues... will try to create another reproducer and open a new issue.