[Bug 1836593] Re: race condition in dep8 test

[Łukasz Zemczak]

Hello Scott, or anyone else affected,

Accepted cloud-utils into disco-proposed. The package will build now and
be available at https://launchpad.net/ubuntu/+source/cloud-
utils/0.31-0ubuntu1.1 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-disco to verification-done-disco. If it does not fix
the bug for you, please add a comment stating that, and change the tag
to verification-failed-disco. In either case, without details of your
testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: cloud-utils (Ubuntu Disco)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-disco

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https://bugs.launchpad.net/bugs/1836593

Title:
  race condition in dep8 test

Status in cloud-utils:
  Fix Committed
Status in cloud-utils package in Ubuntu:
  Confirmed
Status in cloud-utils source package in Disco:
  Fix Committed

Bug description:
  [Impact]

   * As can be seen in dep8 tests on published results [1], there seems
  to be a race condition on tear down of at least one of the growpart
  tests.  We seem to see it most on ppc64el [2].  I'm attaching cloud-
  utils-ppc64el-0.31-0ubuntu1.log that came from [3].

  [Test Case]

  * It seems that the test that fails (at least in the 2 cases I saw) is
  'growpart-loop'.

  The relevant output in the log is this:

      unmount /tmp/test-growpart.VyOylU/mp
      clearing parts [1] from /dev/loop0
      delpart /dev/loop0 1
      delpart: failed to remove partition: Device or resource busy
      FAIL: ./test/test-growpart failed. pt_type=dos resizer=sfdisk

  I've copied the relevant portion of the log to attached 'short.log'.

  [Regression Potential]

  * Minor potential as the only changes being added are "udevadm
  settle". This will likely add a bit of more time to execution but
  won't change the logic of what was already being done (just serialize
  udev events).

  [Other Info]

  [1] https://autopkgtest.ubuntu.com/packages/cloud-utils
  [2] https://autopkgtest.ubuntu.com/packages/cloud-utils/eoan/ppc64el
  [3] https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-eoan/eoan/ppc64el/c/cloud-utils/20190712_175132_5ffd5@/log.gz



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