Can't copy file from drive after mount

[Vascom]

I install google-drive-ocamlfuse via opam.
Mount my drive google-drive-ocamlfuse -debug google.drive
And try copy any file from Drive:
$ cp google.drive/Social/new_multipath_method.aac .
cp: error reading 'google.drive/Social/new_multipath_method.aac': Device or resource busy
cp: failed to extend './new_multipath_method.aac': Device or resource busy

But file exist:
$ ll google.drive/Social/new_multipath_method.aac
-rw-rw-r--. 1 vascom vascom 33M окт 2 2012 google.drive/Social/new_multipath_method.aac

Please help solve problem.

Debug log:
$ cat /home/vascom/.gdfuse/default/gdfuse.log
[0.113469] TID=0: Setting up default filesystem...
[0.113558] TID=0: Loading configuration from /home/vascom/.gdfuse/default/config...done
Saving configuration in /home/vascom/.gdfuse/default/config...done
[0.381024] TID=0: Loading application state from /home/vascom/.gdfuse/default/state...done
Current version: 0.4.4
Setting up cache db...done
Setting up CURL...done
Refresh token already present.
[0.913845] TID=0: Starting filesystem google.drive
[0.923281] TID=0: init_filesystem
[5.062186] TID=0: getattr /dragunkin_hrestomatia
Loading metadata from db...not valid
Refreshing metadata...done
Updating metadata in db...done
Updating context...done
Getting changes from server...done
Updating resource cache...done
Updating trashed resources...done
Removing deleted resources...done
Invalidating trash bin resource...done
Loading resource /dragunkin_hrestomatia (trashed=false) from db...found
[14.934202] TID=0: getattr /Social
Getting metadata from context...valid
Loading resource /Social (trashed=false) from db...found
[14.935310] TID=0: getattr /dragunkin_hrestomatia/About.txt
Getting metadata from context...valid
Loading resource /dragunkin_hrestomatia/About.txt (trashed=false) from db...found
[14.936389] TID=0: getattr /Social/new_multipath_method.aac
Getting metadata from context...valid
Loading resource /Social/new_multipath_method.aac (trashed=false) from db...found
[14.944169] TID=0: fopen /Social/new_multipath_method.aac O_RDONLY
Getting metadata from context...valid
Loading resource /Social/new_multipath_method.aac (trashed=false) from db...found
[14.945594] TID=0: read /Social/new_multipath_method.aac buf 0 0
Getting metadata from context...valid
Loading resource /Social/new_multipath_method.aac (trashed=false) from db...found
Checking MD5 checksum (path=/Social/new_multipath_method.aac, hash=26df982a9a8d8c163ed9237b10e3f505)...
File does not exists.
Downloading resource (id=3454)...Exception:GapiRequest.Forbidden()
Backtrace:
[15.449045] TID=0: read /Social/new_multipath_method.aac buf 0 0
Getting metadata from context...valid
Loading resource /Social/new_multipath_method.aac (trashed=false) from db...found
Checking MD5 checksum (path=/Social/new_multipath_method.aac, hash=26df982a9a8d8c163ed9237b10e3f505)...
File does not exists.
Downloading resource (id=3454)...Exception:GapiRequest.Forbidden()
Backtrace:
[15.907047] TID=0: flush /Social/new_multipath_method.aac 0
Getting metadata from context...valid
Loading resource /Social/new_multipath_method.aac (trashed=false) from db...found
[15.908236] TID=0: release /Social/new_multipath_method.aac O_RDONLY
Getting metadata from context...valid
Loading resource /Social/new_multipath_method.aac (trashed=false) from db...found

[Vascom]

It copy good only after
google-drive-ocamlfuse -cc

[astrada]

The problem is that the Drive API is returning a 403 HTTP error (Forbidden) for that file, so the application cannot download it. You should try to download and reupload it from the web interface (removing the old copy). Maybe this way, the file should be accessible.

[Vascom]

It happens always after copying large number of files. I must do that:
fusermount -u google.drive
google-drive-ocamlfuse google.drive
And continue copying.

[astrada]

Maybe you are going over API quota limits. It should not happen, because the current quota is 100 requests/user/second, and I think it's difficult to reach that limit. But I can run a couple of tests to see if I'm able to reproduce the problem.

[Vascom]

Do it please.
It happens after copying about 500-1000 small files (0.1-1 MB).

[astrada]

I did a couple of tests, uploading 1000 small files. On my slow connection (I have an upload rate of about 50KB/s), it took more than 3 hours, but I didn't experience your problem (the forbidden error). Do you have a faster connection? If your connection is very fast, I think you could hit the Drive API quota and get that kind of error. Maybe I can add some code to handle that situation, retrying after a little bit of time.

[Vascom]

Yes, I have fast connection 50-100 MBit/sec.

[astrada]

I've found the real problem. It's related to expired download links. Downloading files using an expired link causes a 403 error. I should have fixed this issue in version 0.4.6.

[astrada]

I'm closing this issue. If you still have problems, let me know.