[Bug 666449] Re: Software-center fails to launch because of "time data" does not match

[Matthew Paul Thomas]

USC is now much more robust -- it launches, but it still spins forever
trying to display the History. I'll revise the bug report.

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Title:
  "History" screen spins forever if /var/log/apt/history.log is corrupt

Status in “software-center” package in Ubuntu:
  Triaged

Bug description:
  Ubuntu Software Center 3.0.5, Ubuntu 10.10
  software-center trunk r2328, Ubuntu 11.10 beta 1

  1. Make a backup copy of /var/log/apt/history.log.
  2. In the original file, munge one of the timestamps, e.g. change "2011-09-02  19:03:18" to "2011-09-02  1".
  3. Launch USC.
  4. Choose "History".
  5. Close USC and restore history.log from the backup.

  What happens:
  3. USC 3.0.5 fails to launch at all.
  4. USC r2338 launches, but the "History" screen forever shows a spinner, and produces this traceback at the console:
  ------------
  Traceback (most recent call last):
    File "/home/mpt/hacking/software-center/softwarecenter/db/history_impl/apthistory.py", line 107, in _rescan
      self._scan(self.history_file)
    File "/home/mpt/hacking/software-center/softwarecenter/db/history_impl/apthistory.py", line 125, in _scan
      trans = Transaction(stanza)
    File "/home/mpt/hacking/software-center/softwarecenter/db/history.py", line 45, in __init__
      "%Y-%m-%d  %H:%M:%S")
    File "/usr/lib/python2.7/_strptime.py", line 325, in _strptime
      (data_string, format))
  ValueError: time data '2011-09-02  2' does not match format '%Y-%m-%d  %H:%M:%S'
  ------------

  What should happen: The "History" screen should show as many
  transactions as it can read. Any unparseable values should be shown as
  "unknown" or something like that.

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