Calibre froze

[dunhill]

I was using Calibre normally, and when I restarted it after installing a plugin, it took a long time to start.
This is the log using calibre-debug -g. Should I use calibre --ignore-plugins and uninstall it?

walter@walter-SVS15117FLB:~$ calibre-debug -g
calibre 8.2.1  embedded-python: True
Linux-6.8.0-57-generic-x86_64-with-glibc2.39 Linux ('64bit', 'ELF')
('Linux', '6.8.0-57-generic', '#59-Ubuntu SMP PREEMPT_DYNAMIC Sat Mar 15 17:40:59 UTC 2025')
Python 3.11.5
Interface language: es
EXE path: /opt/calibre/bin/calibre-debug
Initialized urlfixer
Successfully initialized third party plugins: DeACSM (0, 0, 16) && Gather KFX-ZIP (from KFX Input) (2, 22, 0) && DeDRM (10, 0, 9) && Package KFX (from KFX Input) (2, 22, 0) && Action Chains (1, 20, 10) && Actualizador Biblioteca LDS (1, 8, 0) && Amazon.com Multiple Countries (1, 0, 0) && Amazon_Precios (1, 0, 0) && Ask Grok (1, 0, 0) && Audio M3U (1, 0, 0) && AudioBook_Duration (1, 0, 10) && Author Book Count (2, 2, 3) && Backup Configuration Folder (1, 1, 2) && Barnes & Noble (1, 5, 6) && Biblioteca EPL (4, 2, 0) && BookFusion Plugin (0, 8, 1) && Busca en internet (1, 8, 1) && CBZ Output (0, 0, 1) && Check Books (0, 1, 8) && Clean Comments (0, 2, 1) && Comfy Reminders (1, 12, 0) && Comicvine (0, 14, 2) && Comments Cleaner (1, 15, 0) && Count Pages (1, 13, 6) && Cuspide_Precios (1, 0, 0) && Ebook Translator (2, 4, 0) && Embed Comic Metadata (1, 6, 6) && EpubCheck (0, 2, 5) && EpubMerge (3, 2, 0) && Extract ISBN (1, 6, 5) && Favourites Menu (1, 3, 1) && Fetch Audio Meta (0, 1, 22) && Find Duplicates (1, 10, 9) && GR Author Notes (1, 2, 1) && Generate Cover (2, 3, 5) && Goodreads (1, 8, 2) && Goodreads Sync (1, 16, 11) && Hardcover (0, 2, 2) && Hyphenate This! (0, 1, 3) && Import List (1, 9, 7) && Job Spy (1, 0, 239) && KFX metadata reader (from KFX Input) (2, 22, 0) && From KFX (2, 22, 0) && KFX Input (2, 22, 0) && Set KFX metadata (from KFX Output) (2, 14, 0) && KFX Output (2, 14, 0) && Kindle Collections (1, 7, 29) && Kindle hi-res covers (0, 5, 1) && KindleUnpack - The Plugin (0, 83, 7) && LanguageTool (0, 1, 3) && Last Modified (0, 8, 5) && Manage Series (1, 5, 2) && Mass Search-Replace (1, 8, 2) && Media File Importer (1, 0, 27) && Modify ePub (1, 8, 6) && MultiColumnSearch (1, 0, 96) && Obok DeDRM (10, 0, 9) && Open With (1, 8, 4) && Quality Check (1, 14, 1) && Quick Preferences (1, 7, 1) && Reading Goal (1, 9, 0) && Reading List (1, 15, 4) && Resize Cover (1, 2, 1) && RomanceIO (2, 0, 5) && Search The Internet (1, 11, 3) && SmartEject (2, 6, 0) && Sum Column (0, 3, 3) && Tematika_Pricecheck (1, 0, 0) && Toggle Internal Viewer (1, 0, 0) && User Category (1, 6, 1) && Wiki Reader (2, 2, 1) && Wikidata (2, 0, 0) && Wikidata gui (2, 0, 0) && WordDumb (3, 33, 2) && ePub Extended Metadata {Writer} (0, 11, 4) && ePub Extended Metadata {Reader} (0, 11, 4) && ePub Extended Metadata (0, 11, 4)
QPA platform: xcb
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 96.0 x 95.9160839160839
ApplicationPaletteChange event ignored
Using calibre Qt style: True
[0.00] Starting up...
[0.01] Showing splash screen...
[1.11] splash screen shown
[1.11] Initializing db...
[434.62] db initialized
[434.62] Constructing main UI...
Using QT6
Using QT6
Ya existen las librerias mutagen y rarfile
Voy a importar el common_utils
Antes del try
Fin del common_utils
DEBUG:    0.0 Clean Comments::config.py - loading translations
DEBUG:    0.0 CleanComment::action.py - loading translations
DEBUG:    0.0 obok::utilities.py - loading translations
DEBUG:    0.0 obok::dialogs.py - loading translations
DEBUG:    0.0 obok::config.py - loading translations
DEBUG:    0.0 obok::action_err.py - loading translations
Traceback (most recent call last):
  File "calibre/gui2/ui.py", line 148, in __init__
  File "calibre/gui2/ui.py", line 166, in init_iaction
  File "calibre/customize/__init__.py", line 655, in load_actual_plugin
AttributeError: 'ToggleInternalViewerPlugin' object has no attribute 'actual_plugin_'
Traceback (most recent call last):
  File "calibre/gui2/ui.py", line 148, in __init__
  File "calibre/gui2/ui.py", line 166, in init_iaction
  File "calibre/customize/__init__.py", line 658, in load_actual_plugin
  File "importlib/__init__.py", line 126, in import_module
  File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1147, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "calibre/customize/zipplugin.py", line 210, in exec_module
  File "calibre_plugins.wikipage_ebook.ui", line 18, in <module>
    from calibre_plugins.wikipage_ebook.main import DemoDialog
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1147, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "calibre/customize/zipplugin.py", line 203, in exec_module
  File "calibre/customize/zipplugin.py", line 199, in get_code
  File "calibre_plugins.wikipage_ebook.main", line 312
    _(' completes the book will be added to your calibre library.')
    ^
SyntaxError: invalid syntax
Initializing wikidata gui preferences
Traceback (most recent call last):
  File "calibre_plugins.wikidata_gui.common_utils", line 14, in <module>
    from PyQt5.Qt import (Qt, QIcon, QPixmap, QLabel, QDialog, QHBoxLayout,
ImportError: cannot import name 'QRegExpValidator' from 'qt.core' (/opt/calibre/lib/calibre-extensions/python-lib.bypy.frozen/qt/core.pyc)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "calibre/gui2/ui.py", line 148, in __init__
  File "calibre/gui2/ui.py", line 166, in init_iaction
  File "calibre/customize/__init__.py", line 658, in load_actual_plugin
  File "importlib/__init__.py", line 126, in import_module
  File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1147, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "calibre/customize/zipplugin.py", line 210, in exec_module
  File "calibre_plugins.wikidata_gui.ui", line 22, in <module>
    from calibre_plugins.wikidata_gui.importbooks import ImportBooks
  File "calibre/customize/zipplugin.py", line 210, in exec_module
  File "calibre_plugins.wikidata_gui.importbooks", line 11, in <module>
    from calibre_plugins.wikidata_gui.dictdicttable import StatusModel
  File "calibre/customize/zipplugin.py", line 210, in exec_module
  File "calibre_plugins.wikidata_gui.dictdicttable", line 12, in <module>
    from calibre_plugins.wikidata_gui.common_utils import get_icon
  File "calibre/customize/zipplugin.py", line 210, in exec_module
  File "calibre_plugins.wikidata_gui.common_utils", line 20, in <module>
    from PyQt4 import QtGui
ModuleNotFoundError: No module named 'PyQt4'
GEN1: Entro en genesis:
GEN2: genesis: icon y triggered connect
GEN3: maingui, menu, iconos (antes del REBUILD MENU
REBUILD1:
PIXMAP
REBUILD2: Creado 1er boton
PIXMAP
REBUILD2: Creado 1er boton
PIXMAP
REBUILD3: Creado 2o boton
REBUILD4: FIN
GEN4: Despues del REBUILD MENU
GEN FIN:
qt.gui.imageio: libpng warning: iCCP: known incorrect sRGB profile
qt.gui.imageio: libpng warning: iCCP: known incorrect sRGB profile
qt.gui.imageio: libpng warning: iCCP: cHRM chunk does not match sRGB
qt.gui.imageio: libpng warning: iCCP: known incorrect sRGB profile
qt.svg: Cannot open file '/home/walter/.config/calibre/resources/images/WordDumb/starfish.svg', because: No such file or directory
qt.svg: Cannot open file '/home/walter/.config/calibre/resources/images/WordDumb/starfish.svg', because: No such file or directory
qt.svg: Cannot open file ':/icons/calibre-default-light/images/WordDumb/starfish.svg', because: No such file or directory
qt.svg: Cannot open file ':/icons/calibre-default-light/images/WordDumb/starfish.svg', because: No such file or directory
[450.35] GUI main window shown
EpubMerge: DEBUG: 2025-04-06 12:52:20,335: calibre_plugins.epubmerge.epubmerge_plugin(156): macmenuhack file_path:/home/walter/.config/calibre/plugins/fanficfare_macmenuhack.txt
Job Spy has begun initialization...
Traceback (most recent call last):
  File "calibre/gui2/ui.py", line 431, in initialize
  File "calibre_plugins.job_spy.ui", line 405, in initialization_complete
    self.migrate_table_preferences_for_jobspy()  #current library only
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "calibre_plugins.job_spy.ui", line 2508, in migrate_table_preferences_for_jobspy
    my_cursor.execute(mysql)
  File "src/cursor.c", line 240, in resetcursor
apsw.BusyError: BusyError: database is locked

[kovidgoyal]

Yes, JobSpy is unmaintained, if its causing issues best to remove it, you can do so with

calibre-customize -r pluginname

[dunhill]

Thanks @kovid. Problem solved! For some reason, metadata.db-journal was created in the library. After deleting it, everything worked again. I was already scared!