#2445 BLOC Untriag: datastore fails to mount some usb disks

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#2445: datastore fails to mount some usb disks
-----------------------+----------------------------------------------------
 Reporter:  tomeu      |       Owner:  bcsaller 
     Type:  defect     |      Status:  new      
 Priority:  blocker    |   Milestone:  Untriaged
Component:  datastore  |     Version:           
 Keywords:             |    Verified:  0        
-----------------------+----------------------------------------------------
 Ben, perhaps that device had an old, incompatible version of the xapian
 db, but I think we should anyway recreate the .olpc.store dir when we fail
 to read the existing one. If we don't do so we risk having lots of usb
 disks unreadable in the journal until they reformat them.

 {{{
 1185311927.2788 DEBUG - root: VolumeToolbar._mount_in_datastore:
 dbus.String(u'/org/freedesktop/Hal/devices/volume_uuid_03DA_023E')
 542     1185311927.4655 ERROR - dbus.connection: Exception in handler for
 D-Bus signal:
 543     Traceback (most recent call last):
 544       File "/usr/lib/python2.5/site-packages/dbus/connection.py", line
 210, in maybe_handle_message
 545         self._handler(*args, **kwargs)
 546       File "/usr/share/activities/Journal.activity/volumestoolbar.py",
 line 124, in <lambda>
 547         lambda *args: self._hal_device_property_modified_cb(udi,
 *args))
 548       File "/usr/share/activities/Journal.activity/volumestoolbar.py",
 line 101, in _hal_device_property_modified_cb
 549         volume_id = self._mount_in_datastore(udi)
 550       File "/usr/share/activities/Journal.activity/volumestoolbar.py",
 line 166, in _mount_in_datastore
 551         dict(title=mount_point))
 552       File "/usr/lib/python2.5/site-
 packages/sugar/datastore/datastore.py", line 227, in mount
 553         return dbus_helpers.mount(uri, options)
 554       File "/usr/lib/python2.5/site-
 packages/sugar/datastore/dbus_helpers.py", line 71, in mount
 555         return _data_store.mount(uri, options)
 556       File "/usr/lib/python2.5/site-packages/dbus/proxies.py", line
 136, in __call__
 557         **keywords)
 558       File "/usr/lib/python2.5/site-packages/dbus/connection.py", line
 603, in call_blocking
 559         message, timeout)
 560     DBusException:
 org.freedesktop.DBus.Python.cPickle.UnpicklingError: Traceback (most
 recent call last):
 561       File "/usr/lib/python2.5/site-packages/dbus/service.py", line
 664, in _message_cb
 562         retval = candidate_method(self, *args, **keywords)
 563       File "/usr/lib/python2.5/site-
 packages/olpc/datastore/datastore.py", line 76, in mount
 564         mp = self.connect_backingstore(uri, **_options)
 565       File "/usr/lib/python2.5/site-
 packages/olpc/datastore/datastore.py", line 152, in connect_backingstore
 566         bs.initialize_and_load()
 567       File "/usr/lib/python2.5/site-
 packages/olpc/datastore/backingstore.py", line 74, in initialize_and_load
 568         self.load()
 569       File "/usr/lib/python2.5/site-
 packages/olpc/datastore/backingstore.py", line 425, in load
 570         super(InplaceFileBackingStore, self).load()
 571       File "/usr/lib/python2.5/site-
 packages/olpc/datastore/backingstore.py", line 224, in load
 572         if desc: self.create_descriptor(**desc)
 573       File "/usr/lib/python2.5/site-
 packages/olpc/datastore/backingstore.py", line 169, in create_descriptor
 574         desc = pickle.load(fp)
 575     UnpicklingError: bad pickle data
 }}}

-- 
Ticket URL: <http://dev.laptop.org/ticket/2445>
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