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ResouceWarning on Python 3.14 from unclosed tempfile.NamedTemporaryFile #1134

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ResouceWarning on Python 3.14 from unclosed tempfile.NamedTemporaryFile#1134
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seanlaw
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enhancementNew feature or request

Description

@mroeschke
mroeschke
opened on Apr 23, 2026
import warnings
 
import numpy as np
import stumpy

with warnings.catch_warnings():
    warnings.filterwarnings("error", category=ResourceWarning)

    rng = np.random.default_rng(42)
    your_time_series = rng.random(10000)
    window_size = (
        50  # Approximately, how many data points might be found in a pattern
    )
    stumpy.gpu_stump(your_time_series, m=window_size, device_id=0)

Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmp1ardm6k6'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmpwze200r5'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmphuv6pm3j'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmp4_v59e8o'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmpuom17x__'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmp2r10jnt6'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmphejxa2ki'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmpv50nsq6c'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmp88ucwns2'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmpgw8vwrs6'>>
/miniforge3/envs/test-stumpy/lib/python3.14/site-packages/numba/cuda/dispatcher.py:536: NumbaPerformanceWarning: Grid size 20 will likely result in GPU under-utilization due to low occupancy.
  warn(NumbaPerformanceWarning(msg))
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmp_ev3_olu'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmpbr37tx23'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmp4jdjzhyl'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmp2x6jukyf'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmp2_79_g0d'>>
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x7932ed931590>:
Traceback (most recent call last):
  File "/miniforge3/envs/test-stumpy/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <_TemporaryFileWrapper file=<_io.BufferedRandom name='/tmp/tmpgrv1ipxp'>>
mparray([[6.863254359622374, 3181, -1, 3181],
         [6.64154485072902, 3182, -1, 3182],
         [6.830177331061536, 3183, -1, 3183],
         ...,
         [6.960611650535677, 970, 970, -1],
         [6.97346754087878, 971, 971, -1],
         [6.800287895530834, 972, 972, -1]], shape=(9951, 4), dtype=object)

I believe this call is creating a temporary file that is never closed

stumpy/stumpy/core.py

Line 2334 in ae5b446

fname = tempfile.NamedTemporaryFile(delete=False)

Activity

  1. seanlaw commented on Apr 23, 2026

    @seanlaw
    seanlaw
    on Apr 23, 2026
    Contributor

    @mroeschke Thank you for brining this to our attention! In the stumpy/gpu_stump.py file, the temp files are deleted via calls to os.remove. I wonder if it is enough to close the temp file prior to deleting the file?

  2. mroeschke commented on Apr 23, 2026

    @mroeschke
    mroeschke
    on Apr 23, 2026
    Author

    I wonder if it is enough to close the temp file prior to deleting the file?

    Yup, that should be sufficient, or use the context manager to ensure the file is closed even if there are errors before the os.remove e.g.

    with core.array_to_temp_file(T_A) as T_A_fname:
    ...

    And the default delete_on_close=True argument in NamedTemporaryFile with the context manager should make the os.remove unnecessary

  3. rapids-bot
    added a commit that references this issue on Apr 23, 2026

    Ignore ResourceWarning from stumpy for Python 3.14 (#22272)

    6418740
  4. seanlaw
    self-assigned this
    on Apr 24, 2026
  5. seanlaw
    added
    enhancementNew feature or request
    on Apr 24, 2026

  6. seanlaw commented on Apr 24, 2026

    @seanlaw
    seanlaw
    on Apr 24, 2026
    Contributor

    @mroeschke I don't have access to a GPU at the moment. Are you able to test if this PR fixes the issue for you?

  7. seanlaw
    closed this as completedin 8b3daf9on Apr 30, 2026
  8. pull
    added a commit that references this issue on Apr 30, 2026

    Fixed stumpy-dev#1134 Close temp file after file name is obtained (st…

    8b3daf9
  9. shrshi
    added a commit that references this issue on May 12, 2026

    Ignore ResourceWarning from stumpy for Python 3.14 (NVIDIA#22272)

    5492e55
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