Communication (including copydown()) with the qemu virt server happens via the serial terminal. That isn't the most solid approach, and I suspect it's racy for some reason.
-- You received this bug notification because you are a member of Canonical's Ubuntu QA, which is subscribed to autopkgtest in Ubuntu. https://bugs.launchpad.net/bugs/2056461 Title: autopkgtest-virt-qemu on noble images sometimes hangs doing copydown Status in autopkgtest package in Ubuntu: New Bug description: autopkgtest-virt-qemu sometimes hangs when running tests on noble images. Originally reported by schopin, who also provided a reproducer: pull-lp-source -d hello autopkgtest-buildvm-ubuntu-cloud -r noble autopkgtest -U hello*.dsc -- qemu ./autopkgtest-noble-amd64.img I've been able to reproduce it with debugging enabled: autopkgtest -ddd -U hello_2.10-3.dsc -- qemu --debug --show-boot /path/to/image It can get stuck during different stages, but AFAICT always during "copydown" operations, log excerpts follow. It may be a coincidence, but this started happening around the time linux- image-6.8.0-11-generic (6.8.0-11.11) migrated to noble. The testbeds I used booted 6.6 but then rebooted into that 6.8 kernel after being upgraded by autopkgtest. -- logs -- Removing autopkgtest-satdep (0) ... [...] autopkgtest-virt-qemu: DBG: executing copydown /tmp/autopkgtest.output.g8v75e8g/tests-tree/ /t/ autopkgtest-virt-qemu: DBG: ['cmdls', "(['tar', '--directory', '/tmp/autopkgtest.output.g8v75e] autopkgtest-virt-qemu: DBG: ['srcstdin', "<_io.BufferedReader name='/dev/null'>", 'deststdout'] autopkgtest-virt-qemu: DBG: +< tar --directory /tmp/autopkgtest.output.g8v75e8g/tests-tree/ -- autopkgtest-virt-qemu: DBG: +> /tmp/autopkgtest-qemu.ztmr6f5k/runcmd sh -ec if ! test -d /tmp- autopkgtest-virt-qemu: DBG: +>? -- or -- autopkgtest: DBG: sending command to testbed: copydown /tmp/autopkgtest.output.c9utq3bx/tests-tree/ /tmp/autopkgtest.H8NDfW/build.DLR/src/ autopkgtest-virt-qemu: DBG: executing copydown /tmp/autopkgtest.output.c9utq3bx/tests-tree/ /tmp/autopkgtest.H8NDfW/build.DLR/src/ autopkgtest-virt-qemu: DBG: ['cmdls', "(['tar', '--directory', '/tmp/autopkgtest.output.c9utq3bx/tests-tree/', '--warning=none', '-c', '.', '-f', '-'], ['/tmp/autopkgtest-qemu.qtkcgg5l/runcm] autopkgtest-virt-qemu: DBG: ['srcstdin', "<_io.BufferedReader name='/dev/null'>", 'deststdout', "<_io.BufferedReader name='/dev/null'>", 'devnull_read', <_io.BufferedReader name='/dev/null'>] autopkgtest-virt-qemu: DBG: +< tar --directory /tmp/autopkgtest.output.c9utq3bx/tests-tree/ --warning=none -c . -f - autopkgtest-virt-qemu: DBG: +> /tmp/autopkgtest-qemu.qtkcgg5l/runcmd sh -ec if ! test -d /tmp/autopkgtest.H8NDfW/build.DLR/src/; then mkdir -- /tmp/autopkgtest.H8NDfW/build.DLR/src/; fi; cd- autopkgtest-virt-qemu: DBG: +>? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/autopkgtest/+bug/2056461/+subscriptions -- Mailing list: https://launchpad.net/~canonical-ubuntu-qa Post to : canonical-ubuntu-qa@lists.launchpad.net Unsubscribe : https://launchpad.net/~canonical-ubuntu-qa More help : https://help.launchpad.net/ListHelp
