[Bug 1887744] Re: systemd dumps core on starting service: Assertion 'u->instance' failed at src/core/load-fragment.c:4798

[Dan Streetman]

> apport generates a core dump which I trust is attached.

unfortunately i don't see it attached; could you manually attach it
please?

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Title:
  systemd dumps core on starting service: Assertion 'u->instance' failed
  at src/core/load-fragment.c:4798

Status in systemd package in Ubuntu:
  New

Bug description:
  On an Ubuntu 20.04 server, when I started a newly installed systemd
  service 'systemctl start testemail2jira.service', systemd trips on an
  assertion (from journalctl):

  Jul 16 13:49:12 pangolin-jiraconf systemd[1]: Assertion 'u->instance' failed at src/core/load-fragment.c:4798, function unit_load_fragment(). Aborting.
  Jul 16 13:49:13 pangolin-jiraconf systemd[1]: Caught <ABRT>, dumped core as pid 2906637.
  Jul 16 13:49:13 pangolin-jiraconf systemd[1]: Freezing execution.

  apport generates a core dump which I trust is attached.

  The server still works, but my terminal keeps showing:

  Failed to get properties: Failed to activate service
  'org.freedesktop.systemd1': timed out (service_start_timeout=25000ms)

  and pauses for 25s after each command.

  In case it's relevant, the <service> i was trying to start had just
  been symlinked into /etc/systemd/system/:

  root at pangolin-jiraconf # ls -la /etc/systemd/system/testemail2jira.service
  lrwxrwxrwx 1 root root 82 Jul 16 13:48 /etc/systemd/system/testemail2jira.service -> /opt/atlassian/jira/current/emailprocessing/testemail2jira/testemail2jira at .service

  File contents:

  [Unit]
  Description=Check that email to %i JIRA works

  [Service]
  #Type=oneshot
  # Note: I keep the config file, testemail2jira.json5 and rsa.* files in emailprocessing/, one directory below testemail2jira/, so that they can be version-controlled independently.
  # If you want testemail2jira.json5 and rsa.* within testemail2jira/, then add testemail2jira/ to WorkingDirectory and remove it from the ExecStart command
  WorkingDirectory=/opt/atlassian/%i/current/emailprocessing
  ExecStart=/opt/atlassian/%i/current/emailprocessing/testemail2jira/venv/bin/python testemail2jira/testemail2jira.py
  User=root

  [Install] 
  WantedBy=multi-user.target

  
  Perhaps the problem is that my service file is a template (testemail2jira at .service), but I symlinked it as a regular 'testemail2jira.service'.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: systemd 245.4-4ubuntu3.1
  ProcVersionSignature: Ubuntu 5.4.0-39.43-generic 5.4.41
  Uname: Linux 5.4.0-39-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27.3
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Thu Jul 16 14:13:06 2020
  InstallationDate: Installed on 2020-05-27 (49 days ago)
  InstallationMedia: Ubuntu-Server 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  Lsusb-t:
   
  Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
  MachineType: QEMU Standard PC (Q35 + ICH9, 2009)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-39-generic root=/dev/sda ro console=ttyS0,19200n8 net.ifnames=0
  SourcePackage: systemd
  SystemdFailedUnits: Error: command ['systemctl', 'status', '--full', 'Error:'] failed with exit code 1: Failed to get properties: Failed to activate service 'org.freedesktop.systemd1': timed out (service_start_timeout=25000ms)
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/01/2014
  dmi.bios.vendor: SeaBIOS
  dmi.bios.version: rel-1.12.0-0-ga698c8995f-prebuilt.qemu.org
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: pc-q35-3.1
  dmi.modalias: dmi:bvnSeaBIOS:bvrrel-1.12.0-0-ga698c8995f-prebuilt.qemu.org:bd04/01/2014:svnQEMU:pnStandardPC(Q35+ICH9,2009):pvrpc-q35-3.1:cvnQEMU:ct1:cvrpc-q35-3.1:
  dmi.product.name: Standard PC (Q35 + ICH9, 2009)
  dmi.product.version: pc-q35-3.1
  dmi.sys.vendor: QEMU

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