Public bug reported:
== Comment: #0 - Anushree Mathur <[email protected]> - 2025-11-28
03:12:11 ==
ENV :
HOST OS : Ubuntu 25.10
Host installation is crashing with following crash when we do
installation on multiple[2 or more] SAN disks and we see -EBUSY error
with specific mpath disk.
generating crash report
report saved to /var/crash/1760429899.735880613.ui.crash
Traceback (most recent call last):
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquity/client/controllers/filesystem.py",
line 296, in _guided_choice
self.ui.set_body(FilesystemView(self.model, self))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquity/ui/views/filesystem/filesystem.py",
line 485, in __init__
self.refresh_model_inputs()
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquity/ui/views/filesystem/filesystem.py",
line 544, in refresh_model_inputs
self.used_list.refresh_model_inputs()
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquity/ui/views/filesystem/filesystem.py",
line 417, in refresh_model_inputs
for obj, cells in summarize_device(device, filter):
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquity/ui/views/filesystem/helpers.py",
line 32, in summarize_device
anns = labels.annotations(device) + labels.usage_labels(device)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/snap/subiquity/6868/usr/lib/python3.12/functools.py", line 909, in
wrapper
return dispatch(args[0].__class__)(*args, **kw)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquity/common/filesystem/labels.py",
line 101, in _annotations_vg
member = next(iter(vg.devices))
^^^^^^^^^^^^^^^^^^^^^^
StopIteration
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/snap/subiquity/6868/usr/bin/subiquity", line 8, in <module>
sys.exit(main())
^^^^^^
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquity/cmd/tui.py", line
161, in main
asyncio.run(run_with_loop())
File "/snap/subiquity/6868/usr/lib/python3.12/asyncio/runners.py", line 194,
in run
return runner.run(main)
^^^^^^^^^^^^^^^^
File "/snap/subiquity/6868/usr/lib/python3.12/asyncio/runners.py", line 118,
in run
return self._loop.run_until_complete(task)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/snap/subiquity/6868/usr/lib/python3.12/asyncio/base_events.py", line
687, in run_until_complete
return future.result()
^^^^^^^^^^^^^^^
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquity/cmd/tui.py", line
159, in run_with_loop
await subiquity_interface.run()
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquity/client/client.py",
line 426, in run
await super().run()
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquitycore/tui.py", line
390, in run
await super().run()
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquitycore/core.py", line
133, in run
raise exc
File
"/snap/subiquity/6868/lib/python3.12/site-packages/subiquity/client/controllers/filesystem.py",
line 300, in show_guided_and_redraw
await self._guided_choice(choice)
RuntimeError: coroutine raised StopIteration
^[[29;1R^[[29;106R
Ubuntu Questing Quokka (development branch) ubuntu-server hvc
Explaining whole scenario:
When I tried to install my P11 lpar with Ubuntu with SAN disk
1) 4 SAN disks are there
2) I installed on mpatha (installation worked fine)
3) I installed on mpathb (installation worked fine)
4) When i rebooted the system connected to the console and then I tried to
reinstall the system it gave the error message [-EBUSY] and then installation
crashed
My analysis:
In the background, after each boot I was entering the shell and was checking
for the multipath status:
1) In the first attempt when i checked it gave all four disks
2) After mpatha installation also all disks were listed in multipath -ll
3) After mpathb installation also all disks were there
4) When I tried the reinstallation after this I saw that multipath service
itself gave the error as :
[2168]: updated bindings file /etc/multipath/bindings
[2168]: mpathb: addmap [0 230686720 multipath 1 queue_if_no_path 1 alua 2 1 ser>
[2168]: libdevmapper: ioctl/libdm-iface.c(1995): device-mapper: reload ioctl on>
[2168]: dm_addmap: libdm task=0 error: Device or resource busy
[2168]: mpathb: ignoring map
[2168]: mpathb: addmap [0 230686720 multipath 1 queue_if_no_path 1 alua 2 1 ser>
[2168]: libdevmapper: ioctl/libdm-iface.c(1995): device-mapper: reload ioctl on>
[2168]: dm_addmap: libdm task=0 error: Device or resource busy
[2168]: mpathb: ignoring map
: Started multipathd.service - Device-Mapper Multipath Device Controller.
5) With multipath -ll I was not able to see mpathb there
6) multipath service is not failing to restart but it is throwing this error
message because mapping is not happening properly!
I feel because of some stale metadata present on the mapathb at the time of
installation which shouldn't have been there, it has happened.
I tried this exact same scenario even on my P10 lpar which had 2 disks and I
observed same kind of behavior!
Reproducibility with this exact scenario is 95%.
Reference bug is https://bugzilla.linux.ibm.com/show_bug.cgi?id=208604 but now
the scenario has been changed!
** Affects: debian-installer (Ubuntu)
Importance: Undecided
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage)
Status: New
** Tags: architecture-ppc64le bugnameltc-216529 severity-high
targetmilestone-inin2604
** Tags added: architecture-ppc64le bugnameltc-216529 severity-high
targetmilestone-inin2604
** Changed in: ubuntu
Assignee: (unassigned) => Ubuntu on IBM Power Systems Bug Triage
(ubuntu-power-triage)
** Package changed: ubuntu => debian-installer (Ubuntu)
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2133480
Title:
Ubuntu25.10: Ubuntu host installation is failing while doing
installation on multiple[2 or more] multipath SAN disks!
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/2133480/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
