Unconstrained download to a directory w/o permission crashes udm

[Barry Warsaw]

One of my system-image test suites creates a destination directory that is unwritable. Previously, when UDM tried to download a file to this while unconstrained, it would issue an error with "Permission denied" in the error output. Now however, udm appears to either crash or freeze. It becomes unresponsive to D-Bus and the error signal is never received, thus failing the test.

Further, since it usually freezes, this affects future tests because udm will not exit when its D-Bus exit method is called. Eventually it gets signal killed and then the tests can proceed.

For now, I will have to skip these tests when s-i runs under udm. The same tests pass for the curl-based downloader.

% dpkg-query -W ubuntu-download-manager
ubuntu-download-manager 0.9+15.04.20141202-0ubuntu1

[Barry Warsaw (barry)]

I added some debugging; here's how to reproduce:

$ bzr branch lp:system-image $ cd system-image $ tox -e py34-udm --notest -r $
SYSTEMIMAGE_PYCURL=0 SYSTEMIMAGE_DBUS_DAEMON_HUP_SLEEP_SECONDS=2
SYSTEMIMAGE_REACTOR_TIMEOUT=60 .tox/py34-udm/bin/python -m nose2 -vv -P
TestAPI.test_state_machine_exceptions

I am watching the D-Bus signals and all I see is the `started` signal. After
that, nothing and the dbus loop times out. It doesn't matter how long I crank
the timeout to, no other signals are ever received.

[Barry Warsaw (barry)]

Ping?

[Launchpad Janitor (janitor)]

This bug was fixed in the package ubuntu-download-manager - 1.3+16.10.20160909.1-0ubuntu1

---------------
ubuntu-download-manager (1.3+16.10.20160909.1-0ubuntu1) yakkety; urgency=medium

  [ Florian Boucault ]
  * Fixes for crossbuilding.

  [ Michael Sheldon ]
  * Make user visible strings translatable (LP: #1618892)
  * Fix queue blocking and error reporting when file path is unwritable
    (LP: #1411866)
  * Remove dependency on qt5-default metapackage

 -- Michael Sheldon <email address hidden> Fri, 09 Sep 2016 11:49:03 +0000