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[Marco Trevisan (Treviño) <mail@xxxxxxxxx>]

** Changed in: unity (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/721289

Title:
  Sync problems when restarting Unity place daemons

Status in Dee:
  Fix Released
Status in Unity:
  Fix Released
Status in Unity Applications Lens:
  Fix Released
Status in Unity Files Lens:
  Fix Released
Status in “dee” package in Ubuntu:
  Fix Released
Status in “unity” package in Ubuntu:
  Fix Released
Status in “unity-place-applications” package in Ubuntu:
  Fix Released
Status in “unity-place-files” package in Ubuntu:
  Fix Released

Bug description:
  When any of the Unity place daemons are restarted you'll see something
  like:

  -----------
  $ src/unity-applications-daemon 
  (process:2494): unity-applications-daemon-DEBUG: daemon.vala:346: Building initial application menu
  (process:2494): unity-applications-daemon-DEBUG: daemon.vala:367: Indexing application menu
  (process:2494): libunity-DEBUG: unity-place.vala:772: No browser to export

  (process:2494): dee-CRITICAL **: clone_leader: assertion
  `self->priv->revision_queue == NULL' failed

  (process:2494): dee-CRITICAL **: clone_leader: assertion
  `dee_model_get_n_rows (DEE_MODEL (self)) == 0' failed

  (process:2494): dee-WARNING **: Transaction from
  com.canonical.Unity.ApplicationsPlace.ResultsModel is in the future.
  Ignoring transaction.

  (process:2494): dee-WARNING **: Transaction from
  com.canonical.Unity.ApplicationsPlace.SectionsModel is in the past.
  Ignoring transaction.

  (process:2494): dee-WARNING **: Transaction from com.canonical.Unity.ApplicationsPlace.GroupsModel is in the past. Ignoring transaction.
  ---------

  and the shared models will fail to sync properly. There are two issues
  at play here:

  1) DeeSharedModel doesn't accept seqnum > 0 for its first Commit, which it should
    - This obviously needs to be fixed in Dee

  2) Architecture problem between place daemons and unity shell - the shell should not hold a writable model. Can be fixed by one these measures:
    2.1) Make sure the place daemons only start updating their models *after* they've received the "notify::synchronized" GObject signal from the models.
    2.2) Implement a read-only DBus model that doesn't own the swarm name. See bug #675565

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