Ubuntu
software-center package

USC doesn't launch in guest session (OSError: [Errno 13] Permission denied)

Bug #741069 reported by Matthew Paul Thomas on 2011-03-23

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	software-center (Ubuntu)	Fix Released	High	Kiwinote

Bug Description

Binary package hint: software-center

Ubuntu Software Center 3.1.24, Ubuntu Natty

1. Switch to a guest session.
2. At a terminal, enter "software-center" (without quotes).

What should happen: USC launches.

What actually happens:
------------
2011-03-23 15:35:53,772 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/share/software-center/softwarecenter/db/database.py', 154, 'open')'
2011-03-23 15:35:53,772 - root - WARNING - failed to add sca db Couldn't stat '/tmp/guest-home.d0EQHC/.cache/software-center/software-center-agent.db' (No such file or directory)
Traceback (most recent call last):
  File "/usr/bin/software-center", line 110, in <module>
    app = SoftwareCenterApp(datadir, xapian_base_path, options, args)
  File "/usr/share/software-center/softwarecenter/app.py", line 172, in __init__
    self.review_loader = get_review_loader(self.cache, self.db)
  File "/usr/share/software-center/softwarecenter/db/reviews.py", line 757, in get_review_loader
    review_loader = ReviewLoaderThreadedRNRClient(cache, db)
  File "/usr/share/software-center/softwarecenter/db/reviews.py", line 346, in __init__
    self._new_review_stats = Queue()
  File "/usr/lib/python2.7/multiprocessing/__init__.py", line 215, in Queue
    return Queue(maxsize)
  File "/usr/lib/python2.7/multiprocessing/queues.py", line 63, in __init__
    self._rlock = Lock()
  File "/usr/lib/python2.7/multiprocessing/synchronize.py", line 147, in __init__
    SemLock.__init__(self, SEMAPHORE, 1, 1)
  File "/usr/lib/python2.7/multiprocessing/synchronize.py", line 75, in __init__
    sl = self._semlock = _multiprocessing.SemLock(kind, value, maxvalue)
OSError: [Errno 13] Permission denied
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/apport_python_hook.py", line 109, in apport_excepthook
    os.O_WRONLY|os.O_CREAT|os.O_EXCL, 0o600), 'w')
OSError: [Errno 13] Permission denied: '/var/crash/_usr_share_software-center_software-center.113.crash'

Original exception was:
Traceback (most recent call last):
  File "/usr/bin/software-center", line 110, in <module>
    app = SoftwareCenterApp(datadir, xapian_base_path, options, args)
  File "/usr/share/software-center/softwarecenter/app.py", line 172, in __init__
    self.review_loader = get_review_loader(self.cache, self.db)
  File "/usr/share/software-center/softwarecenter/db/reviews.py", line 757, in get_review_loader
    review_loader = ReviewLoaderThreadedRNRClient(cache, db)
  File "/usr/share/software-center/softwarecenter/db/reviews.py", line 346, in __init__
    self._new_review_stats = Queue()
  File "/usr/lib/python2.7/multiprocessing/__init__.py", line 215, in Queue
    return Queue(maxsize)
  File "/usr/lib/python2.7/multiprocessing/queues.py", line 63, in __init__
    self._rlock = Lock()
  File "/usr/lib/python2.7/multiprocessing/synchronize.py", line 147, in __init__
    SemLock.__init__(self, SEMAPHORE, 1, 1)
  File "/usr/lib/python2.7/multiprocessing/synchronize.py", line 75, in __init__
    sl = self._semlock = _multiprocessing.SemLock(kind, value, maxvalue)
OSError: [Errno 13] Permission denied
------------

Related branches

lp:~kiwinote/software-center/tweaks (Merged)

lp:ubuntu/natty/software-center

Revision history for this message

Kiwinote (kiwinote) wrote on 2011-03-23:

Hi mpt! Thanks for noticing this. It has been fixed in the branch linked.

Technical comments:
It would seem that we can't use the python multiprocessing module due to the limitations of the guest session. I have implemented a fallback from ReviewLoaderThreadedRNRClient to ReviewLoaderJsonAsync in this case. As the Json loader hasn't been used in a while I've also made some tweaks to make it work again in the most common cases.

Changed in software-center (Ubuntu):
assignee:	nobody → Kiwinote (kiwinote)
importance:	Undecided → High
status:	New → Fix Committed

Revision history for this message

Launchpad Janitor (janitor) wrote on 2011-04-01:

Download full text (3.7 KiB)

This bug was fixed in the package software-center - 3.1.25

---------------
software-center (3.1.25) natty; urgency=low

  [ Kiwinote ]
  * data/ui/SoftwareCenter.ui:
    - mark the back/forward actions as translatable (LP: #742129)
  * softwarecenter/db/database.py,
    softwarecenter/models/appstore.py,
    softwarecenter/view/availablepane.py,
    others:
    - make custom lists work (LP: #712903)
  * softwarecenter/app.py,
    softwarecenter/distro/Ubuntu.py,
    softwarecenter/view/widgets/pathbar_gtk_atk.py:
    - when the supported filter is set to supported_only, navigate up if:
      - we are in a details view of an app which is not supported (LP: #480827)
      - we are in a list view which becomes empty
  * softwarecenter/app.py,
    softwarecenter/view/catview_gtk.py:
    - correctly count the nr of apps displayed in the recommended category and
      update it when needed (LP: #735634)
    - only display subcategories if they are non-empty (LP: #419270)
  * softwarecenter/backend/weblive.py:
    - don't crash if we try to delete a non-existent file (LP: #743511)
  * softwarecenter/db/reviews.py,
    softwarecenter/distro/Ubuntu.py:
    - fallback to ReviewLoaderJsonAsync when we can't use multiprocessing
      (LP: #741069)
    - fixes to make ReviewLoaderJsonAsync 'work' (ie most common cases)
  * softwarecenter/db/update.py:
    - don't import softwarecenter.log
  * softwarecenter/view/appdetailsview_gtk.py:
    - don't draw random boxes when we have an error layout (LP: #739269)
    - retire share button as we now have full microblogging support in the
      review dialog (LP: #592619, LP: #743765)
  * softwarecenter/view/appview.py:
    - correctly refresh listview when supported filters are changed
  * softwarecenter/view/catview.py:
    - if a category has subcategories, then category.query should include all
      items included in the subcategories, not a subset of these
  * softwarecenter/view/widgets/pathbar_gtk_atk.py:
    - avoid having a half-height pathbar (LP: #743614)
  * refresh .pot file

  [ Gary Lasker ]
  * softwarecenter/view/widgets/reviews.py:
    - fix crash if app_version is not defined when
      calling upstream_version_compare (LP: #746120)
  * softwarecenter/view/purchaseview.py:
    - disconnect webkit signal handlers when the webkit view
      is not showing (LP: #696861)
    - support 'user_cancelled' from the software-center-agent
      (LP: #641321)
  * softwarecenter/view/softwarepane.py,
    softwarecenter/view/widgets/actionbar.py:
    - animate the action bar show/hide
  * softwarecenter/view/appview.py:
    - in the AppViewFilter, also consider apps in the for-purchase
      channel as available; this allows them to show up in
      e.g. What's New (LP: #746679)

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Changed in software-center (Ubuntu):
status:	Fix Committed → Fix Released

Ubuntusoftware-center package