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Bug#1030096: Any ideas Re: #1030096 dask.distributed intermittent autopkgtest fail ?

Cross-posted to 2 groups.

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(Background: the pandas + dask transition broke dask.distributed and it 
was hence removed from testing; I didn't notice at the time that if we 
don't get it back in we lose Spyder.)

On 05/02/2023 21:44, Rebecca N. Palmer wrote:
> I currently have this in a state where it sometimes succeeds and 
> sometimes doesn't:
> https://salsa.debian.org/rnpalmer-guest/dask.distributed/-/tree/fix1030096
> 
> Tests I've seen to fail multiple times (and don't have a fix for):
> test_balance_expensive_tasks[enough work to steal]
> https://salsa.debian.org/rnpalmer-guest/dask.distributed/-/jobs/3902376
> (Seems to be the most common problem.  Using @pytest.mark.flaky to try 3 
> times doesn't seem to have helped, suggesting that if it fails once it 
> keeps failing in that run.  Applying part of upstream pull 7253 seemed 
> to make things worse, but I haven't tried applying the whole thing.)
> test_popen_timeout
> https://salsa.debian.org/rnpalmer-guest/dask.distributed/-/jobs/3902745
> 
> Tests I've seen to fail once:
> test_stress_scatter_death
> https://salsa.debian.org/rnpalmer-guest/dask.distributed/-/jobs/3902040
> test_tcp_many_listeners[asyncio]
> https://salsa.debian.org/rnpalmer-guest/dask.distributed/-/jobs/3896327

And now test_failing_task_increments_suspicious (once):
https://salsa.debian.org/rnpalmer-guest/dask.distributed/-/jobs/3903956
(We don't have to pass build-i386 (as this is an arch:all package) or 
reprotest, but if these are effectively-random failures, they might also 
be able to occur in build or autopkgtest.)

I'm probably the wrong person to be working on this - I don't know 
enough about this package to say whether ignoring this kind of 
intermittent failure (as my 'flaky' marks do) is appropriate, or to have 
much idea how to actually fix it.

We could also try upgrading dask + dask.distributed to 2023.1, but 
that's a risky move at this point.

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Bug#1030096: #1030096 dask.distributed autopkgtest fail "Rebecca N. Palmer" <rebecca_palmer@zoho.com> - 2023-02-04 19:40 +0100
  Bug#1030096: #1030096 dask.distributed autopkgtest fail Andreas Tille <andreas@fam-tille.de> - 2023-02-05 10:20 +0100
  Bug#1030096: Any ideas Re: #1030096 dask.distributed intermittent autopkgtest fail ? "Rebecca N. Palmer" <rebecca_palmer@zoho.com> - 2023-02-06 09:10 +0100
    Bug#1030096: Any ideas Re: #1030096 dask.distributed intermittent autopkgtest fail ? Diane Trout <diane@ghic.org> - 2023-02-06 20:40 +0100
      Bug#1030096: Any ideas Re: #1030096 dask.distributed intermittent autopkgtest fail ? "Rebecca N. Palmer" <rebecca_palmer@zoho.com> - 2023-02-06 22:50 +0100
        Bug#1030096: Any ideas Re: #1030096 dask.distributed intermittent autopkgtest fail ? "Rebecca N. Palmer" <rebecca_palmer@zoho.com> - 2023-02-07 08:40 +0100
          Bug#1030096: dask.distributed intermittent autopkgtest fail Diane Trout <diane@ghic.org> - 2023-02-09 07:40 +0100
            Bug#1030096: dask.distributed intermittent autopkgtest fail Diane Trout <diane@ghic.org> - 2023-02-09 18:10 +0100
              Bug#1030096: dask.distributed intermittent autopkgtest fail Diane Trout <diane@ghic.org> - 2023-02-09 22:40 +0100
                Bug#1030096: dask.distributed intermittent autopkgtest fail "Rebecca N. Palmer" <rebecca_palmer@zoho.com> - 2023-02-09 23:00 +0100
                Bug#1030096: dask.distributed intermittent autopkgtest fail "Rebecca N. Palmer" <rebecca_palmer@zoho.com> - 2023-02-09 23:10 +0100
                Bug#1030096: dask.distributed intermittent autopkgtest fail Nilesh Patra <nilesh@debian.org> - 2023-02-10 04:20 +0100
                Bug#1030096: dask.distributed intermittent autopkgtest fail Diane Trout <diane@ghic.org> - 2023-02-10 04:50 +0100
                Bug#1030096: dask.distributed intermittent autopkgtest fail Nilesh Patra <nilesh@debian.org> - 2023-02-10 09:20 +0100
          Bug#1030096: dask.distributed intermittent autopkgtest fail Andreas Tille <andreas@fam-tille.de> - 2023-02-09 07:40 +0100

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