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Old 09-10-2018, 03:22 PM   #1
ciccio
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Download metadata problem

Hi.
calibre, version 3.31.0
Win10

I have been using the "download metadata" tool forever. Just yesterday, all of a sudden, this error message appears when used:


Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\simple_worker.py", line 289, in main
File "site-packages\calibre\ebooks\metadata\sources\worker.py ", line 102, in single_identify
File "site-packages\calibre\ebooks\metadata\sources\update.py ", line 79, in patch_plugins
File "site-packages\calibre\ebooks\metadata\sources\update.py ", line 62, in patch_search_engines
File "<string>", line 11, in <module>
ImportError: No module named polyglot.builtins

Any clue on how to solve this? THANKS!
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Old 09-10-2018, 03:24 PM   #2
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Can't help, I'm afraid, but I'm having the same issue.
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Old 09-10-2018, 03:26 PM   #3
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Please excuse the "me, too!" comment here, same thing just occurred today on my Calibre, on OSX, after years of smooth metadata downloads.

Full traceback:

calibre, version 3.31.0 (darwin, embedded-python: True)
Failed to download metadata: Failed: Download metadata for one book

Starting job: Download metadata for one book
Job: "Download metadata for one book" failed with error:
Traceback (most recent call last):
File "site-packages/calibre/gui2/threaded_jobs.py", line 84, in start_work
File "site-packages/calibre/gui2/metadata/bulk_download.py", line 255, in download
Exception: Failed to download metadata. Original traceback:

Traceback (most recent call last):
File "site-packages/calibre/utils/ipc/simple_worker.py", line 289, in main
File "site-packages/calibre/ebooks/metadata/sources/worker.py", line 55, in main
File "site-packages/calibre/ebooks/metadata/sources/update.py", line 79, in patch_plugins
File "site-packages/calibre/ebooks/metadata/sources/update.py", line 62, in patch_search_engines
File "<string>", line 11, in <module>
ImportError: No module named polyglot.builtins


Called with args: ([194], u'/var/folders/rf/rdpn700x08l289827wkm61v00000gn/C/calibre_3.31.0_tmp_UF1uUM/EMbgLL_metadata_bulk.log', <calibre.db.legacy.LibraryDatabase object at 0x117bb1a50>, True, True, None) {u'abort': <threading._Event object at 0x11fd87790>, u'log': <calibre.utils.logging.GUILog object at 0x11fd87810>, u'notifications': <Queue.Queue instance at 0x11be4f7a0>}
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Old 09-10-2018, 03:33 PM   #4
Chilipops
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Add me to the list. Version 3.31 64bit Windows 10 and Windows 7:

Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\simple_worker.py", line 289, in main
File "site-packages\calibre\ebooks\metadata\sources\worker.py ", line 102, in single_identify
File "site-packages\calibre\ebooks\metadata\sources\update.py ", line 79, in patch_plugins
File "site-packages\calibre\ebooks\metadata\sources\update.py ", line 62, in patch_search_engines
File "<string>", line 11, in <module>
ImportError: No module named polyglot.builtins
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Old 09-10-2018, 03:35 PM   #5
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Can confirm happening using Linux Mint 19, I did both a system restore and reverted to calibre 3.28 still same error. This worked on Saturday using 3.31. calibre 3.28 on windows 10 still works.

Now is is good I checked metadata download on widows and it worked one time, then I when back to try it again and now get the same error.

Spoiler:

Code:
 $ calibre-debug -g
calibre 3.28  embedded-python: True is64bit: True
Linux-4.15.0-33-generic-x86_64-with-debian-buster-sid Linux ('64bit', 'ELF')
('Linux', '4.15.0-33-generic', '#36-Ubuntu SMP Wed Aug 15 16:00:05 UTC 2018')
Python 2.7.12
Linux: ('debian', 'buster/sid', '')
Interface language: None
Successfully initialized third party plugins: DeDRM (6, 5, 5) && Diaps Editing Toolbag (0, 3, 5) && Quality Check (1, 9, 11) && Hyphenate This! (0, 0, 8) && EpubSplit (2, 4, 0) && Modify ePub (1, 3, 13) && Barnes & Noble (1, 2, 15) && KindleUnpack - The Plugin (0, 81, 5) && Baen (0, 0, 3) && Goodreads (1, 1, 14) && Reading List (1, 6, 6)
Turning off automatic hidpi scaling
QGtkStyle could not resolve GTK. Make sure you have installed the proper libraries.
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 85.0837438424 x 85.184279476
Using calibre Qt style: True
QGtkStyle could not resolve GTK. Make sure you have installed the proper libraries.
[0.00] Starting up...
[0.02] Showing splash screen...
[0.28] splash screen shown
[0.28] Initializing db...
[0.39] db initialized
[0.39] Constructing main UI...
libpng warning: iCCP: known incorrect sRGB profile
Looking for desktop notifier support from: org.freedesktop.Notifications
org.freedesktop.Notifications found in 0.0 seconds
[2.78] main UI initialized...
[2.78] Hiding splash screen
DEBUG:    0.0 get_baen_id: match_group= None
[3.22] splash screen hidden
[3.22] Started up in 3.22 seconds with 864 books
DEBUG:    2.1 get_baen_id: match_group= None
Metadata sources cache was recently updated not updating again


calibre, version 3.28.0
ERROR: Download failed: Failed to download metadata. Click Show Details to see details

Traceback (most recent call last):
  File "site-packages/calibre/utils/ipc/simple_worker.py", line 289, in main
  File "site-packages/calibre/ebooks/metadata/sources/worker.py", line 102, in single_identify
  File "site-packages/calibre/ebooks/metadata/sources/update.py", line 79, in patch_plugins
  File "site-packages/calibre/ebooks/metadata/sources/update.py", line 62, in patch_search_engines
  File "<string>", line 11, in <module>
ImportError: No module named polyglot.builtins




$ calibre-debug -g
calibre 3.31  embedded-python: True is64bit: True
Linux-4.15.0-33-generic-x86_64-with-debian-buster-sid Linux ('64bit', 'ELF')
('Linux', '4.15.0-33-generic', '#36-Ubuntu SMP Wed Aug 15 16:00:05 UTC 2018')
Python 2.7.12
Linux: ('debian', 'buster/sid', '')
Interface language: None
Successfully initialized third party plugins: DeDRM (6, 5, 5) && Modify ePub (1, 3, 13) && Barnes & Noble (1, 2, 15) && Baen (0, 0, 3) && Goodreads (1, 1, 14) && Reading List (1, 6, 6) && Quality Check (1, 9, 11) && KindleUnpack - The Plugin (0, 81, 5) && EpubSplit (2, 4, 0) && Hyphenate This! (0, 0, 8) && Diaps Editing Toolbag (0, 3, 5)
Turning off automatic hidpi scaling
QGtkStyle could not resolve GTK. Make sure you have installed the proper libraries.
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 85.0837438424 x 85.184279476
Using calibre Qt style: True
QGtkStyle could not resolve GTK. Make sure you have installed the proper libraries.
[0.00] Starting up...
[0.02] Showing splash screen...
[0.29] splash screen shown
[0.29] Initializing db...
[0.39] db initialized
[0.39] Constructing main UI...
libpng warning: iCCP: known incorrect sRGB profile
Looking for desktop notifier support from: org.freedesktop.Notifications
org.freedesktop.Notifications found in 0.0 seconds
[2.75] main UI initialized...
[2.75] Hiding splash screen
DEBUG:    0.0 get_baen_id: match_group= None
[3.18] splash screen hidden
[3.19] Started up in 3.19 seconds with 864 books
DEBUG:    1.5 get_baen_id: match_group= None
Metadata sources cache was recently updated not updating again



calibre, version 3.31.0
ERROR: Download failed: Failed to download metadata. Click Show Details to see details

Traceback (most recent call last):
  File "site-packages/calibre/utils/ipc/simple_worker.py", line 289, in main
  File "site-packages/calibre/ebooks/metadata/sources/worker.py", line 102, in single_identify
  File "site-packages/calibre/ebooks/metadata/sources/update.py", line 79, in patch_plugins
  File "site-packages/calibre/ebooks/metadata/sources/update.py", line 62, in patch_search_engines
  File "<string>", line 11, in <module>
ImportError: No module named polyglot.builtins

calibre-debug -g
calibre 3.28  embedded-python: True is64bit: False
Windows-10-10.0.10240-SP0 Windows ('32bit', 'WindowsPE')
('Windows', '10', '10.0.10240')
Python 2.7.12+
Windows: ('10', '10.0.10240', 'SP0', u'Multiprocessor Free')
Interface language: None
Successfully initialized third party plugins: DeDRM (6, 3, 6) && Quality Check (1, 9, 11) && Generate Cover (1, 5, 21) && Modify ePub (1, 3, 13) && Baen (0, 0, 3) && Barnes & Noble (1, 2, 15) && KindleUnpack - The Plugin (0, 81, 5) && Diaps Editing Toolbag (0, 3, 5) && Hyphenate This! (0, 0, 8) && EpubSplit (2, 4, 0) && Goodreads (1, 1, 14)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 120.0 x 120.0
physicalDpi: 179.624309392 x 172.203389831
Using calibre Qt style: True
[0.00] Starting up...
[0.02] Showing splash screen...
[0.53] splash screen shown
[0.91] Initializing db...
[2.19] db initialized
[2.19] Constructing main UI...
libpng warning: iCCP: known incorrect sRGB profile
[14.09] main UI initialized...
[14.09] Hiding splash screen
DEBUG:    0.0 get_baen_id: match_group= None
[15.95] splash screen hidden
[15.97] Started up in 15.97 seconds with 2958 books
Metadata sources cache was recently updated not updating again



calibre, version 3.28.0
ERROR: Download failed: Failed to download metadata. Click Show Details to see details

Traceback (most recent call last):
  File "site-packages\calibre\utils\ipc\simple_worker.py", line 289, in main
  File "site-packages\calibre\ebooks\metadata\sources\worker.py", line 102, in single_identify
  File "site-packages\calibre\ebooks\metadata\sources\update.py", line 79, in patch_plugins
  File "site-packages\calibre\ebooks\metadata\sources\update.py", line 62, in patch_search_engines
  File "<string>", line 11, in <module>
ImportError: No module named polyglot.builtins


bernie

Last edited by gbm; 09-10-2018 at 03:51 PM. Reason: added windows debug info
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Old 09-10-2018, 03:37 PM   #6
JanSH
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I came here to post the exact same problem. I have only just updated to 3.31. I did notice the installation for the first time insisted on a reboot, which I did. Attempting to download metadata now fails instantly with the "Failed to download metadata" and the traceback posted below (exactly the same as the others').

Windows 10 64-bit.

What I have tried (which does not work):
- Reboot.
- Repair install set
- Uninstall Calibre and reinstall to a different path on disk.
- Tear out my hair.

Any help would be much appreciated!

Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\simple_worker.py", line 289, in main
File "site-packages\calibre\ebooks\metadata\sources\worker.py ", line 102, in single_identify
File "site-packages\calibre\ebooks\metadata\sources\update.py ", line 79, in patch_plugins
File "site-packages\calibre\ebooks\metadata\sources\update.py ", line 62, in patch_search_engines
File "<string>", line 11, in <module>
ImportError: No module named polyglot.builtins

Last edited by JanSH; 09-10-2018 at 03:38 PM. Reason: typo
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Old 09-10-2018, 04:06 PM   #7
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I have the same issue. In Linux 64 Ubuntu-Kubuntu 18.04 calibre 3.31 and in Windows 10 64 calibre 3.31. I tried to solve downgrading calibre to 3.30 in Windows but no luck.

(I posted a message here two hours ago but I can't see anymore )
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Old 09-10-2018, 04:15 PM   #8
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A temporary workaround for this problem.

Go to

Preferences-Miscellaneous--Open calibre configuration directory

Then delete the file metadata-sources-cache.json

This is will only work as long as you do not close calibre, you close then you wiil have to replete.

bernie
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Old 09-10-2018, 04:18 PM   #9
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That works. You are truly a Wizard, gbm. Thank you!
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Old 09-10-2018, 04:22 PM   #10
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Thanks gbm.... It fixed the problem for me as well.
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Old 09-10-2018, 04:24 PM   #11
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I followed these instructions, this didn't work for me. I still can't download metadata.

Quote:
Originally Posted by gbm View Post
A temporary workaround for this problem.

Go to

Preferences-Miscellaneous--Open calibre configuration directory

Then delete the file metadata-sources-cache.json

This is will only work as long as you do not close calibre, you close then you wiil have to replete.

bernie
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Old 09-10-2018, 04:26 PM   #12
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Okay, never mind. I tried it again, and it worked. THANK YOU. So is this a permanent fix? Will we have to do this each time we open Calibre?
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Old 09-10-2018, 04:28 PM   #13
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Workaround is OK... but only for one download.

Quote:
Originally Posted by gbm View Post
A temporary workaround for this problem.

Go to

Preferences-Miscellaneous--Open calibre configuration directory

Then delete the file metadata-sources-cache.json

This is will only work as long as you do not close calibre, you close then you wiil have to replete.

bernie
It worked! But only ONE metadata download works, then the poison cache-file is created and the process fails as usual. This focuses the source of the problem, which is good, but it's a cumbersome workaround.
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Old 09-10-2018, 05:41 PM   #14
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Some Progress, but a bit strange

Instead of deleting the file "metadata-sources-cache.json" I set it to be a zero-byte-sized file.

Now it all works again.... even repeatedly through calibre restarts, etc.

BUT... a strange BUT.....

When I download metadata for popular titles, now they are almost always for the audiobook versions of the books [I don't use audiobooks].

Have NEVER, over years of use, seen this happen.

So the fix is still partial, but liveable for now.

EDIT: I also tried a two-byte file, containing an empty JSON dataset {}. This also works.

Last edited by PacificNW; 09-10-2018 at 05:51 PM. Reason: Added info on empty-JSON file instead of zero-byte file.
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Old 09-10-2018, 05:51 PM   #15
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Quote:
Originally Posted by PacificNW View Post
Instead of deleting the file "metadata-sources-cache.json" I set it to be a zero-byte-sized file.

Now it all works again.... even repeatedly through calibre restarts, etc.

BUT... a strange BUT.....

When I download metadata for popular titles, now they are almost always for the audiobook versions of the books [I don't use audiobooks].

Have NEVER, over years of use, seen this happen.

So the fix is still partial, but liveable for now.
How many sources do you have configured? Audiobook only might be because whatever is broken, is the only one that is still functioning.
I just did a test on my laptop running (a never updated) Calibre 3.29, Same issue.
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