dask/distributed

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A distributed task scheduler for Dask

Stars: 1.7k
Forks: 778
Open beginner issues: 0
Indexed issues: 1.2k
Avg merge: 2h 50m
Merged PRs (30d): 3

Dominant language: Python
License: BSD-3-Clause
Last GitHub push: Aug 26, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted good first issue

Beginner friendly Everything

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1,248 open issues indexed

Scipy's spmatrix deprecation keeps the Upstream nightly red after #9351 — all 14 test_serialize_scipy_sparse cases fail Open

needs triage

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

dask/distributed#9353 · Opened Aug 21, 2026
Interest in Codex re-write of the dashboard? Open

needs triage

Difficulty 5/5 Over a week Newbie friendliness 25/100

dask/distributed#9339 · Opened Jul 31, 2026
dask-scheduler command not found with newer versions of distributed Open

needs triage

Difficulty 3/5 1-2 days Newbie friendliness 52/100

dask/distributed#9335 · 1 comment · Opened Jul 22, 2026
Adaptivity should be managed on the scheduler Open

needs triage

Difficulty 5/5 Over a week Newbie friendliness 28/100

dask/distributed#9307 · 4 comments · Opened Jun 26, 2026
SpecCluster._correct_state_internal closes workers with Nanny's default 5s timeout; shutdown often fails on LocalCluster(processes=True) Open

needs triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

dask/distributed#9300 · 3 comments · Opened Jun 12, 2026
done_callback raises RuntimeError during interpreter shutdown Open

needs triage

Difficulty 2/5 1-3 hours Newbie friendliness 50/100

dask/distributed#9211 · Opened Mar 18, 2026
Xarray indices and other non-Dask variables are round-tripped to the Dask scheduler Open

memory p2 performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

dask/distributed#9200 · 6 comments · Opened Mar 3, 2026
Sphinx 9 compatibility Open

documentation

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

dask/distributed#9189 · 1 comment · 1 reaction · Opened Feb 3, 2026
Client.get doesn't evaluate dependency if it's in dictionary value or nested inside dictionary Open

needs triage

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dask/distributed#9186 · Opened Jan 30, 2026
Dataframe shuffle: Behaviour for NULL partitions differs from Pandas 3 Open

bug p2 shuffle

Difficulty 3/5 1-2 days Newbie friendliness 42/100

dask/distributed#9184 · 1 comment · Opened Jan 29, 2026
rootish tasks with resources restrictions are not queued Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

dask/distributed#9164 · 4 comments · Opened Dec 12, 2025
dask unstable; multiple race condition errors: P2PConsistencyError, RuntimeError, FutureCancelledError ... Open

bug needs info needs reproducer

Difficulty 5/5 Over a week Newbie friendliness 20/100

dask/distributed#9163 · 5 comments · Opened Dec 10, 2025
High CPU usage when idle, possibly DNS related Open

bug help wanted windows

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#9161 · 6 comments · Opened Dec 5, 2025
distributed zarr write fail - OSError: too many open files; P2PConsistencyError: No active shuffle with Open

needs triage

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dask/distributed#9156 · 4 comments · Opened Nov 27, 2025
spans and annotations lost across copute() boundaries Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#9138 · 1 comment · Opened Nov 7, 2025
LocalCluster fails to spawn requested number of workers (capped at 5 workers on Windows) Open

needs info

Difficulty 4/5 3-5 days Newbie friendliness 42/100

dask/distributed#9134 · 3 comments · Opened Nov 3, 2025
Forward `multiprocessing.current_process().authkey` to workers Open

bug

Difficulty 5/5 Over a week Newbie friendliness 35/100

dask/distributed#9122 · 3 comments · Opened Oct 8, 2025
Resource scheduling bug: Scheduler allows over-allocation by ignoring worker's current resource usage Open

bug scheduler

Difficulty 4/5 3-5 days Newbie friendliness 45/100

dask/distributed#9108 · 2 comments · Opened Sep 9, 2025
check if a Plugin is present Open

enhancement good first issue help wanted

Difficulty 4/5 3-5 days Newbie friendliness 42/100

dask/distributed#9106 · 2 comments · Opened Sep 5, 2025
Semantic mismatch in `SpecCluster.requested` Open

needs info

Difficulty 3/5 1-2 days Newbie friendliness 42/100

dask/distributed#9103 · 2 comments · Opened Aug 26, 2025
`SpecCluster` fails to remove grouped workers when they die, breaking adaptive scaling Open

needs info

Difficulty 4/5 3-5 days Newbie friendliness 45/100

dask/distributed#9102 · 2 comments · 1 reaction · Opened Aug 26, 2025
Workers killed by signal 6/9 and timeout errors during cluster shutdown with `LocalCUDACluster` Open

needs triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#9100 · Opened Aug 15, 2025
`/metrics` sometimes miss dask specific metrics Open

bug help wanted

Difficulty 3/5 1-2 days Newbie friendliness 42/100

dask/distributed#9096 · 2 comments · Opened Jul 8, 2025
Support NUMBA_NUM_THREADS env variable Open

needs triage

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

dask/distributed#9075 · 1 reaction · Opened May 13, 2025
test_computation_object_code_dask_compute fails when using --reruns Open

flaky test

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dask/distributed#9053 · Opened Apr 24, 2025
Frequently failing CI test `distributed/tests/test_tls_functional.py::test_nanny` Open

flaky test

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dask/distributed#9052 · 1 comment · Opened Apr 22, 2025
Scheduler deadlock when using SSHCluster due to stderr blocking Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 52/100

dask/distributed#9033 · 3 comments · Opened Mar 30, 2025
StreamClosedError when calling client.shutdown() Open

discussion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#9032 · 4 comments · Opened Mar 27, 2025
Dask may stop the instances on the middle of calculation without objective reason Open

adaptive needs info

Difficulty 5/5 Over a week Newbie friendliness 20/100

dask/distributed#9024 · 6 comments · Opened Mar 14, 2025
"TypeError: h5py objects cannot be pickled" when applying map_blocks to dask array constructed from HDF5 dataset Open

bug help wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#9013 · 3 comments · Opened Feb 14, 2025
While registering a scheduler plugin get TypeError: PooledRPCCall.__getattr__.<locals>.send_recv_from_rpc() takes 0 positional arguments but 1 was given Open

bug regression

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

dask/distributed#9001 · 7 comments · Opened Feb 3, 2025
Multiple semaphores render scheduler unresponsive and crash entire cluster Open

bug good expert issue help wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#8999 · Opened Feb 1, 2025
Priorities are ignored when stealing tasks Open

bug help wanted scheduling stealing

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#8992 · 5 comments · Opened Jan 21, 2025
Increasing value of `OMP_NUM_THREADS` reduces performance even when controlling for `n_workers` and `threads_per_worker` Open

bug discussion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#8985 · 8 comments · Opened Jan 13, 2025
Add config to control default direct_to_worker value Open

config enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dask/distributed#8964 · Opened Dec 12, 2024
`Client.compute` doesn't materialize delayed chunk of persisted array if provided as a dict value Open

bug regression

Difficulty 3/5 1-2 days Newbie friendliness 65/100

dask/distributed#8959 · 3 comments · 2 reactions · Opened Dec 9, 2024
Simplify hosing of Dask Scheduler Dashboard behind the proxy Open

needs triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#8957 · 1 reaction · Opened Dec 5, 2024
`RuntimeError: Not enough arguments provided: missing keys` in `dask.persist` with mix of `Future` and `Delayed` Open

bug regression

Difficulty 4/5 3-5 days Newbie friendliness 42/100

dask/distributed#8948 · 5 comments · Opened Nov 25, 2024
Cannot get actors to work with async / await Open

needs triage

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dask/distributed#8940 · 2 comments · Opened Nov 16, 2024
The subclass of `dict` is not respected on `>=2024.11.0` Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

dask/distributed#8932 · 2 comments · 2 reactions · Opened Nov 13, 2024
Warn (and eventually raise) when client.scatter is used with Active Memory Manager enabled Open

needs triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#8921 · 4 comments · Opened Nov 4, 2024
Reuse worker to scheduler WS connection for scheduling Open

needs triage

Difficulty 5/5 Over a week Newbie friendliness 25/100

dask/distributed#8918 · 4 comments · Opened Oct 30, 2024
Opening the TCP comm port in a browser results in an exception Open

needs triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

dask/distributed#8905 · 1 comment · Opened Oct 24, 2024
[BUG] temp_dask folder sometimes is not founded and raises an error Open

needs triage

Difficulty 3/5 1-2 days Newbie friendliness 30/100

dask/distributed#8902 · 1 comment · Opened Oct 21, 2024
Consider using object pools for internal state keeping Open

discussion

Difficulty 5/5 Over a week Newbie friendliness 20/100

dask/distributed#8901 · 3 comments · Opened Oct 21, 2024
Get more informative timeout variable names or clarify them in the comments Open

needs info

Difficulty 3/5 1-2 days Newbie friendliness 42/100

dask/distributed#8885 · 1 comment · 1 reaction · Opened Oct 7, 2024
Scheduler should not be considered idle while a client submits new work Open

enhancement good expert issue scheduler

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#8876 · 1 comment · 1 reaction · Opened Sep 19, 2024
Attempting to view details of a key held by a worker results in a 404 Open

bug dashboard

Difficulty 3/5 1-2 days Newbie friendliness 38/100

dask/distributed#8866 · 3 comments · Opened Sep 9, 2024
Improve error message when spilling runs out of disk Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 38/100

dask/distributed#8863 · 1 reaction · Opened Sep 6, 2024
Adding futures into a `Queue` disables `resources` argument in `submit` function. Open

bug regression

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dask/distributed#8860 · Opened Sep 5, 2024

dask/distributed

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