Multiple (dozens of) Error messages

[oybobby]

Hello,

Sorry to bother you, but here I am. Since beginning to use Calibre, it's been fairly stable. Just recently, though, I began getting many error messages in rapid succession. Several times I had to force quit because the error messages were coming so fast and without end that I had to get away.

Could it be linked to library size? Having tried everything, I finally moved about 20% of the library to a new library. That seemed to fix it.

Anyhow, here is a sampling of the messages I've been seeing:

calibre, version 2.24.0
ERROR: Unhandled exception: <b>Exception</b>:Failed to open u'/Users/mo/Calibre Library/Qingrui Yin, Binghe Zhu, Huarong Zeng/Microstructure, Property and Processing of Functional Ceramics (4324)/cover.jpg' with error: [Errno 24] Too many open files: u'/Users/mo/Calibre Library/Qingrui Yin, Binghe Zhu, Huarong Zeng/Microstructure, Property and Processing of Functional Ceramics (4324)/cover.jpg'

Traceback (most recent call last):
File "site-packages/calibre/gui2/cover_flow.py", line 117, in image
File "site-packages/calibre/gui2/library/models.py", line 690, in cover
File "site-packages/calibre/db/legacy.py", line 332, in cover
File "site-packages/calibre/db/cache.py", line 645, in cover
File "site-packages/calibre/db/cache.py", line 57, in call_func_with_lock
File "site-packages/calibre/db/cache.py", line 686, in copy_cover_to
File "site-packages/calibre/db/backend.py", line 1311, in copy_cover_to
Exception: Failed to open u'/Users/mo/Calibre Library/Qingrui Yin, Binghe Zhu, Huarong Zeng/Microstructure, Property and Processing of Functional Ceramics (4324)/cover.jpg' with error: [Errno 24] Too many open files: u'/Users/mo/Calibre Library/Qingrui Yin, Binghe Zhu, Huarong Zeng/Microstructure, Property and Processing of Functional Ceramics (4324)/cover.jpg'

calibre, version 2.24.0
ERROR: Failed to set data: Could not set data, click Show Details to see why.

Traceback (most recent call last):
File "site-packages/calibre/gui2/library/models.py", line 1046, in setData
File "site-packages/calibre/gui2/library/models.py", line 1120, in _set_data
File "site-packages/calibre/db/legacy.py", line 435, in set
File "site-packages/calibre/db/cache.py", line 57, in call_func_with_lock
File "site-packages/calibre/db/cache.py", line 1037, in set_field
File "site-packages/calibre/db/write.py", line 513, in set_books
File "site-packages/calibre/db/write.py", line 426, in many_many
File "site-packages/calibre/db/backend.py", line 816, in executemany
File "src/cursor.c", line 231, in resetcursor
CantOpenError: CantOpenError: unable to open database file

calibre, version 2.24.0
ERROR: Unhandled exception: <b>ImportError</b>:No module named restore_library

Traceback (most recent call last):
File "site-packages/calibre/gui2/actions/choose_library.py", line 455, in restore_database
ImportError: No module named restore_library

calibre, version 2.24.0
WARNING: Error while saving: Failed to update metadata in some books, click "Show details" for more information

Failed to update the metadata in the PDF format of: Making places in the prehistoric world: themes in settlement archaeology by Joanna Bruck, with error:
Traceback (most recent call last):
File "site-packages/calibre/customize/ui.py", line 365, in set_file_type_metadata
File "site-packages/calibre/customize/builtins.py", line 502, in set_metadata
File "site-packages/calibre/ebooks/metadata/pdf.py", line 160, in set_metadata
File "site-packages/calibre/utils/podofo/__init__.py", line 41, in set_metadata
Exception: Failed to set PDF metadata: Traceback (most recent call last):
File "site-packages/calibre/utils/ipc/simple_worker.py", line 274, in main
File "site-packages/calibre/utils/podofo/__init__.py", line 57, in set_metadata_
Error: A number was expected but not found.

Thanks for any help you can provide.

Regards,
Maurice

[theducks]

A WAG

Pathname is very long

Users/mo/Calibre Library/Qingrui Yin, Binghe Zhu, Huarong Zeng/Microstructure, Property and Processing of Functional Ceramics (4324)

The other question is how did this slip by: Calibre usually shortens long titles

Kovid will probably have to answer this

[kovidgoyal]

Your OS is running out of open file handles. A bit of googling will show you how to increase the max number of open file handles on OS X.