I've put in another file with 828 MB. After transferring some 86 MB the
sync died again, and U1 pretends to be IDLE. I have the feeling that the
pattern behind this is the transfer rate which is somewhat variable from
1MB/s (what is still slow in comparison to other sync services out
there) to some kB/s (<10). Again, I'm on a 1GBit/s line. Once the
transfer rate creeps slightly above 0, the sync daemon throws an error,
and I get a notification stating that the upload of my file has just
started followed by a notification that the transfer is complete (what
can't be true if only 86 MB went through eth0 while the file size is 828
MB):

2011-11-18 14:57:09,260 - ubuntuone.status - DEBUG - server connection made
2011-11-18 15:14:01,417 - ubuntuone.status - DEBUG - queueing command (total: 
0): Upload
2011-11-18 15:14:02,064 - ubuntuone.status - DEBUG - notification shown: 
»TEST2.zip« wird in Ihren persönlichen Online-Speicher hochgeladen.
2011-11-18 15:20:00,385 - ubuntuone.status - DEBUG - progressbar shown
2011-11-18 15:20:00,488 - ubuntuone.status - DEBUG - progressbar updated: 
0.081356
2011-11-18 15:23:38,138 - ubuntuone.status - DEBUG - server connection lost
2011-11-18 15:23:40,728 - ubuntuone.status - DEBUG - server connection made
2011-11-18 15:23:40,815 - ubuntuone.status - DEBUG - notification shown: 
»TEST2.zip« wird in Ihren persönlichen Online-Speicher hochgeladen.
2011-11-18 15:23:40,873 - ubuntuone.status - DEBUG - server connection lost
2011-11-18 15:23:45,143 - ubuntuone.status - DEBUG - server connection made
2011-11-18 15:23:45,162 - ubuntuone.status - DEBUG - notification shown: 
»TEST2.zip« wird in Ihren persönlichen Online-Speicher hochgeladen.
2011-11-18 15:23:46,889 - ubuntuone.status - DEBUG - unqueueing command: Upload
2011-11-18 15:23:46,942 - ubuntuone.status - DEBUG - queue done callback added
2011-11-18 15:23:46,990 - ubuntuone.status - DEBUG - progressbar updated: 
1.000000
2011-11-18 15:23:56,943 - ubuntuone.status - DEBUG - queue done callback fired
2011-11-18 15:23:57,010 - ubuntuone.status - DEBUG - progressbar hidden

So the percentage transferred jumps from 8% to 100%.

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
syncdaemon-exceptions.log: 

2011-11-18 15:23:46,782 - ubuntuone.SyncDaemon.ActionQueue - ERROR - Upload     
                  share:''                                       node:'...'   
Upload(share_id="''", hash="'...'", running='False', node_id="'...'", 
upload_id='None', crc32='133509230L', path="'/.../Ubuntu One/TEST2.zip'", 
previous_hash="''", size='828164869') failure: I/O operation on closed file 
(traceback follows)
Traceback (most recent call last):
  File 
"/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/action_queue.py",
 line 1370, in run
    result = yield self.running_deferred
ValueError: I/O operation on closed file

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

apt-cache policy ubuntuone-client python-ubuntuone-client:

python-ubuntuone-client:
  Installiert: 2.0.0-0ubuntu2.1
  Kandidat:    2.0.0-0ubuntu2.1
  Versionstabelle:
 *** 2.0.0-0ubuntu2.1 0
        500 http://ubuntu.osuosl.org/ubuntu/ oneiric-proposed/main i386 Packages
        100 /var/lib/dpkg/status
     2.0.0-0ubuntu2 0
        500 http://ubuntu.osuosl.org/ubuntu/ oneiric-updates/main i386 Packages
     2.0.0-0ubuntu1 0
        500 http://ubuntu.osuosl.org/ubuntu/ oneiric/main i386 Packages
ubuntuone-client:
  Installiert: 2.0.0-0ubuntu2.1
  Kandidat:    2.0.0-0ubuntu2.1
  Versionstabelle:
 *** 2.0.0-0ubuntu2.1 0
        500 http://ubuntu.osuosl.org/ubuntu/ oneiric-proposed/main i386 Packages
        100 /var/lib/dpkg/status
     2.0.0-0ubuntu2 0
        500 http://ubuntu.osuosl.org/ubuntu/ oneiric-updates/main i386 Packages
     2.0.0-0ubuntu1 0
        500 http://ubuntu.osuosl.org/ubuntu/ oneiric/main i386 Packages

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Please let me know if I can assist any further fixing this bug.

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https://bugs.launchpad.net/bugs/872924

Title:
  Resuming a failed upload crashes with ValueError: I/O operation on
  closed file

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