Issues

• read LOKY_MAX_MEMORY_LEAK_SIZE on the fly

  joblib/joblib#1915 · Filter by author stepan-srsen opened on Oct 24, 2026
  1

• Logger.info bypasses its configured logging namespace

  joblib/joblib#1907 · Filter by author IlyaKhalafi opened on Oct 19, 2026

• CI Intermittent issue test_child_raises_parent_exits_cleanly[loky]

  joblib/joblib#1906 · Filter by author lesteve opened on Oct 19, 2026

• test_auto_scatter sometimes fail

  joblib/joblib#1890 · Filter by author Nanored4498 opened on Oct 14, 2026
  3

• AsyncNotMemorizedFunc.call is not awaitable when caching is disabled

  joblib/joblib#1876 · Filter by author RRiiiccckkk opened on Oct 10, 2026

• loky workers get logical_cpus // n_jobs threads, scikit-learn's OpenMP code uses only physical cores

  joblib/joblib#1869 · Filter by author cakedev0 opened on Oct 1, 2026
  1

• Figure out any necessary changes to automatic nesting policy once Python worker oversaturation prevention is merged

  joblib/joblib#1866 · Filter by author itamarst opened on Sep 30, 2026
  1

• Deadlocks when running with pytest-run-parallel

  joblib/joblib#1865 · Filter by author itamarst opened on Sep 29, 2026
  1

• For n_jobs=-1 if the number of initial batches is smaller than the number of available cores, use the former instead

  joblib/joblib#1858 · Filter by author itamarst opened on Sep 21, 2026
  7

• joblib.hash / Memory.cache crash on dicts with Decimal('NaN') keys

  joblib/joblib#1847 · Filter by author ShamikOfficial opened on Sep 5, 2026

• Prevent oversaturation of OpenMP/BLAS when using Python threads

  joblib/joblib#1846 · Filter by author itamarst opened on Sep 2, 2026
  6

• joblib.Parallel with threading backend is a lot slower than concurrent.futures.ThreadPoolExecutor

  joblib/joblib#1830 · Filter by author itamarst opened on Jul 28, 2026
  12

• test_dask.py fails under pytest-run-parallel

  joblib/joblib#1818 · Filter by author itamarst opened on Jul 14, 2026
  1

• Tools for inspecting and cleaning cache

  joblib/joblib#1807 · Filter by author etyl opened on Jun 25, 2026
  1

• SQL Store Backend

  joblib/joblib#1806 · Filter by author etyl opened on Jun 25, 2026

• Full shutdown issue (resource tracker is always running as process)

  joblib/joblib#1786 · Filter by author MrMarvel opened on Apr 2, 2026

• Control the number of threads with n_jobs=1

  joblib/joblib#1764 · Filter by author julia-schmitt opened on Dec 11, 2025
  3

• Intermittent CI timeout on Windows in test_memmapping.py

  windows
  joblib/joblib#1751 · Filter by author lesteve opened on Oct 29, 2025
  3

• test_permission_error_windows_memmap_sent_to_parent intermittent error on Windows

  windows
  joblib/joblib#1750 · Filter by author lesteve opened on Oct 29, 2025
  1

• Support Parallel(..., backend="multiprocessing", return_as="generator", ...)

  joblib/joblib#1735 · Filter by author Doekeb opened on Aug 15, 2025

• Performance: joblib.Parallel is significantly slower than ProcessPoolExecutor for tasks with large objects

  joblib/joblib#1733 · Filter by author liblaf opened on Aug 2, 2025
  3

• Pydantic models not (un)pickled correctly with _LokyPickler

  joblib/joblib#1732 · Filter by author antoninkriz opened on Jul 28, 2025
  5

• cpu_count() returns 61 on a 256-core Windows system due to a hard max_workers limit

  joblib/joblib#1729 · Filter by author bluewowo opened on Jul 4, 2025
  1

• Serialization error when using PEP695 type syntax from python 3.12.

  joblib/joblib#1728 · Filter by author SolalAttiasInstadeep opened on Jun 17, 2025
  1

• Periodical failures of a cache_validation_callback()

  joblib/joblib#1727 · Filter by author slarionoff opened on Jun 9, 2025