Calibre 4.1 BusyError: database is locked

Tanjamuse · 10-10-2019, 01:42 AM

I don't know what kind of error this is, except that I've never seen it before:

Code:

calibre, version 4.1.0
ERROR: Unhandled exception: <b>BusyError</b>:BusyError: database is locked

calibre 4.1 [64bit]  embedded-python: True is64bit: True
Windows-10-10.0.18362-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.18362')
Python 2.7.16+
Windows: ('10', '10.0.18362', 'SP0', u'Multiprocessor Free')
Interface language: en_GB
Successfully initialized third party plugins: Find Duplicates (1, 6, 3) && Import List (1, 3, 0) && MultiColumnSearch (1, 0, 74) && Favourites Menu (1, 0, 4) && Generate Cover (1, 5, 21) && Count Pages (1, 8, 2) && FanFicFare (3, 11, 5) && Job Spy (1, 0, 159) && Tanja's Tools (0, 0, 8) && Save Composite Custom Columns (1, 1, 0) && Reading List (1, 6, 6) && User Category (1, 5, 3)
Traceback (most recent call last):
  File "site-packages\calibre\gui2\__init__.py", line 484, in dispatch
  File "site-packages\calibre\gui2\actions\choose_library.py", line 590, in switch_requested
  File "site-packages\calibre\gui2\ui.py", line 761, in library_moved
  File "calibre_plugins.tanja_tools.action", line 81, in library_changed
  File "calibre_plugins.tanja_tools.action", line 88, in rebuild_menus
  File "site-packages\calibre\db\legacy.py", line 82, in __init__
  File "site-packages\calibre\db\legacy.py", line 47, in create_backend
  File "site-packages\calibre\db\backend.py", line 434, in __init__
  File "site-packages\calibre\db\backend.py", line 622, in initialize_custom_columns
  File "site-packages\calibre\db\backend.py", line 874, in execute
  File "c:\t\t\apsw-tti2z1cq\src\cursor.c", line 236, in resetcursor
BusyError: BusyError: database is locked

All I did was switch from one library to another.

I have 16 gb RAM

kovidgoyal · 10-10-2019, 12:50 PM

That error indicates there are multiple processes reading the database. Given that you also have issues with something opening and locking the viewer's cache files, there is definitely something screwy going on with your system.

Tanjamuse · 10-10-2019, 12:52 PM

It never happened in the old version, I went over all the anti-virus-settings previously but didn't find anything.

kovidgoyal · 10-10-2019, 12:53 PM

Try running for a while in safe mode, that tends to eliminate most sch nuisance programs.

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10-10-2019, 12:50 PM	#2
kovidgoyal creator of calibre Posts: 43,942 Karma: 22669822 Join Date: Oct 2006 Location: Mumbai, India Device: Various	That error indicates there are multiple processes reading the database. Given that you also have issues with something opening and locking the viewer's cache files, there is definitely something screwy going on with your system.

10-10-2019, 12:52 PM	#3
Tanjamuse Wizard Posts: 1,327 Karma: 5306 Join Date: Jan 2014 Device: none	It never happened in the old version, I went over all the anti-virus-settings previously but didn't find anything.

10-10-2019, 12:53 PM	#4
kovidgoyal creator of calibre Posts: 43,942 Karma: 22669822 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Try running for a while in safe mode, that tends to eliminate most sch nuisance programs.

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