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[Bug 1891158] Re: riscv64 build - hang at the end of the build with hanging "dbus-test-runner"

 

** Changed in: dbus-test-runner (Ubuntu)
       Status: New => Fix Released

** Changed in: dee (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1891158

Title:
  riscv64 build - hang at the end of the build with hanging "dbus-test-
  runner"

Status in dbus-test-runner package in Ubuntu:
  Fix Released
Status in dee package in Ubuntu:
  Fix Released

Bug description:
  The builds for riscv64 on e.g.
  https://launchpad.net/ubuntu/+source/dee/1.2.7+17.10.20170616-6build1
  hang eventually.

  All other architectures work fine.

  
  Build log tail will be like:
  ...
    symlinking changelog.Debian.gz in dee-tools to file in libdee-1.0-4
  pkgstripfiles: Running PNG optimization (using 8 cpus) for package dee-tools ...
  pkgstripfiles: No PNG files.
  dpkg-deb: building package 'dee-tools' in '../dee-tools_1.2.7+17.10.20170616-6build1_riscv64.deb'.
  pkgstriptranslations: libdee-1.0-4-dbgsym does not contain translations, skipping
  pkgstriptranslations: no translation files, not creating tarball
  pkgmaintainermangler: Not overriding Maintainer for domain lists.ubuntu.com
  pkgstripfiles: processing control file: debian/.debhelper/libdee-1.0-4/dbgsym-root/DEBIAN/control, package libdee-1.0-4-dbgsym, directory debian/.debhelper/libdee-1.0-4/dbgsym-root
  dpkg-deb: building package 'libdee-1.0-4-dbgsym' in 'debian/.debhelper/scratch-space/build-libdee-1.0-4/libdee-1.0-4-dbgsym_1.2.7+17.10.20170616-6build1_riscv64.deb'.
   Renaming libdee-1.0-4-dbgsym_1.2.7+17.10.20170616-6build1_riscv64.deb to libdee-1.0-4-dbgsym_1.2.7+17.10.20170616-6build1_riscv64.ddeb
  pkgstriptranslations: dee-tools-dbgsym does not contain translations, skipping
  pkgstriptranslations: no translation files, not creating tarball
  pkgmaintainermangler: Not overriding Maintainer for domain lists.ubuntu.com
  pkgstripfiles: processing control file: debian/.debhelper/dee-tools/dbgsym-root/DEBIAN/control, package dee-tools-dbgsym, directory debian/.debhelper/dee-tools/dbgsym-root
  dpkg-deb: building package 'dee-tools-dbgsym' in 'debian/.debhelper/scratch-space/build-dee-tools/dee-tools-dbgsym_1.2.7+17.10.20170616-6build1_riscv64.deb'.
   Renaming dee-tools-dbgsym_1.2.7+17.10.20170616-6build1_riscv64.deb to dee-tools-dbgsym_1.2.7+17.10.20170616-6build1_riscv64.ddeb
   dpkg-genbuildinfo --build=any
   dpkg-genchanges --build=any -mLaunchpad Build Daemon <buildd@riscv64-qemu-lcy01-015.buildd> >../dee_1.2.7+17.10.20170616-6build1_riscv64.changes
  dpkg-genchanges: info: binary-only arch-specific upload (source code and arch-indep packages not included)
   dpkg-source --after-build .
  dpkg-buildpackage: info: binary-only upload (no source included)

  
  Then it will be stuck until at 24h a timeout will reap the builder.

  It turned out (thanks cjwatson) that on these systems there is a
  leftover process

  Zombie schroot process
  Looks like there's a dbus-daemon process still running in the background of the build that the build didn't clean up properly
  buildd    481987  0.0  0.0   5244  2780 ?        S    Aug10   0:00 dbus-daemon --config-file /usr/share/dbus-test-runner/session.conf --print-address
  # ls -l /proc/481987/cwd
  lrwxrwxrwx 1 buildd buildd 0 Aug 11 10:08 /proc/481987/cwd -> /home/buildd/build-PACKAGEBUILD-19646792/chroot-autobuild/build/dee-1HAMJl/dee-1.2.7+17.10.20170616/tests

  
  On #ubuntu-devel we discussed this and agreed that we should not just retry until it slips through by accident, we might never be able to build it again.

  Instead we should try looking for what actually hangs on riscv64 and
  why.

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