Error: Filedescriptor out of range

[h0tp-ftw]

Hello! This issue is triggered after an extended session of anki, when I have done a lot of cards and reached the 1024 FD limit. I wasn't sure if the flatpak packaging specifically was the reason this error would happen, that's why I have shared it here. Any help is appreciated. Thank you!

Anki 25.02.4 (a5c33ad0) (src) (ao)
Python 3.12.10 Qt 6.9.0 PyQt 6.9.0
Platform: Linux-6.15.6-103.bazzite.fc42.x86_64-x86_64-with-glibc2.40

Exception in thread Thread-1:
Traceback (most recent call last):
File "/usr/lib/python3.12/threading.py", line 1075, in _bootstrap_inner
self.run()
File "/app/lib/python3.12/site-packages/aqt/mediasrv.py", line 121, in run
self.server.run()
File "/app/lib/python3.12/site-packages/waitress/server.py", line 325, in run
self.asyncore.loop(
File "/app/lib/python3.12/site-packages/waitress/wasyncore.py", line 240, in loop
poll_fun(timeout, map)
File "/app/lib/python3.12/site-packages/waitress/wasyncore.py", line 167, in poll
r, w, e = select.select(r, w, e, timeout)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: filedescriptor out of range in select()

Exception in threading.excepthook:
Exception ignored in thread started by: <bound method Thread._bootstrap of <MediaServer(Thread-1, started 140185335187136)>>
Traceback (most recent call last):
File "/usr/lib/python3.12/threading.py", line 1032, in _bootstrap
self._bootstrap_inner()
File "/usr/lib/python3.12/threading.py", line 1077, in _bootstrap_inner
self._invoke_excepthook(self)
File "/usr/lib/python3.12/threading.py", line 1391, in invoke_excepthook
local_print("Exception in threading.excepthook:",
AttributeError: 'ErrorHandler' object has no attribute 'flush'
Exception ignored in sys.unraisablehook:
AttributeError: 'ErrorHandler' object has no attribute 'flush'

===Add-ons (active)===
(add-on provided name [Add-on folder, installed at, version, is config changed])
'' ['1908235722', 0, 'None', mod]
Addon Config Sync ['60290354', 2024-05-21T13:11, 'None', '']
Anki Leaderboard - Compete with friends to boost motivation Custom by Shige ['175794613', 2025-05-14T16:23, 'None', mod]
Anki Leaderboard Plus - Customized by Shige ['AnkiLeaderBoardPlus', 0, 'None', mod]
Anki Terminator V2 - ChatGPT DeepSeek Sidebar for Reviewer Created by Shige ['1468920185', 2025-06-23T06:07, 'None', mod]
Chartpopup Show Reference Images During Review ['317566972', 2025-06-27T14:03, 'None', '']
Custom Background Image and Gear Icon ['1210908941', 2025-06-22T07:27, 'None', mod]
Image Occlusion Enhanced ['1374772155', 2022-04-09T01:15, 'None', '']
Rebuild All Empty All for Anki 21 ['1810938259', 2018-07-19T22:40, 'None', '']
Review Heatmap ['1771074083', 2022-06-29T19:43, 'None', '']
Review Hotmouse ['1928346827', 2024-11-25T18:07, '2.12', mod]

[rayes0]

It is likely not a flatpak issue, the file descriptor limit should be the same as the one system wide. A fix would be to increase the limit at a system wide level.

Have you tried running without addons in the latest version (hold shift while starting)?