Dashboard is wonky with bokeh 3

With bokeh 3.0.2, the task stream doesn’t show up, nor do the ‘tasks processing’ bars. (I’ve more commonly seen that a few tasks intermittently show up on the task stream, but most are missing. The ‘tasks processing’ bars always seem to be broken.)

After pip install 'bokeh<3':

In [1]: import distributed

In [2]: import dask.array as da

In [3]: client = distributed.Client()

In [4]: da.random.random(200_000, chunks=100).sum().compute()

I see this with both macOS and linux running the scheduler, both Chrome and Safari as the browser.

Environment:

• Distributed version: 176a84cb2bb86d6c9fc1507fbceccd63178be260, or 2022.11.0
• Python version: 3.9.1
• Operating System: macOS
• Install method (conda, pip, source): source

[gjoseph92]

• https://github.com/dask/dask/pull/9673
• https://github.com/dask/distributed/pull/7329

[gjoseph92]

we can’t 100% prevent users from installing bokeh=3 in all cases

Agreed, I don’t think we can do anything about that. I tried experimenting with setting bounds on optional dependencies, but unsurprisingly pip doesn’t care about them unless you’re installing the option.

Mostly having dask[complete] and conda install dask give you the right thing seems like the primary concern right now. I’m happy to open some PRs adding the pin back.