[Bug 2048388] Re: Test suite often fails with "systemd units changed without reload" on s390x

[Olivier Gayot]

** Also affects: netplan
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/2048388

Title:
  Test suite often fails with "systemd units changed without reload" on
  s390x

Status in netplan:
  New
Status in netplan.io package in Ubuntu:
  New

Bug description:
  The "ethernets" autopkgtest for netplan.io 0.107-5ubuntu2 on s390x
  often fails with

  AssertionError: systemd units changed without reload

  Looking at the history of autopkgtest runs, it looks like that the
  error does not always occur during execution of a specific test. I've
  seen occurrences of this error during the following test-cases:

  test_dhcp6 (__main__.TestNetworkd.test_dhcp6) ... FAIL
  test_link_local_ipv4 (__main__.TestNetworkd.test_link_local_ipv4) ... FAIL
  test_eth_mtu (__main__.TestNetworkd.test_eth_mtu) ... FAIL

  Example [1]:

  781s FAIL: test_dhcp6 (__main__.TestNetworkd.test_dhcp6)
  781s ----------------------------------------------------------------------
  781s Traceback (most recent call last):
  781s   File "/tmp/autopkgtest.G0qQU0/build.Snp/src/tests/integration/ethernets.py", line 189, in test_dhcp6
  781s     self.generate_and_settle([self.state_dhcp6(self.dev_e_client)])
  781s   File "/tmp/autopkgtest.G0qQU0/build.Snp/src/tests/integration/base.py", line 342, in generate_and_settle
  781s     self.fail('systemd units changed without reload')
  781s AssertionError: systemd units changed without reload

  [1] https://autopkgtest.ubuntu.com/results/autopkgtest-
  noble/noble/s390x/n/netplan.io/20240105_144627_cb35e@/log.gz

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