[Bug 2009141] Comment bridged from LTC Bugzilla

bugproxy 2009141 at bugs.launchpad.net
Wed Apr 12 17:31:09 UTC 2023


------- Comment From MAIER at de.ibm.com 2023-04-12 13:24 EDT-------
(In reply to comment #25)
> Thx for attaching the logs and the crash report, we'll investigate ...
>
> What I'm just wondering about are the '"OSError: [Errno 28] No space left on
> device"' messages. Is there something with the FCP/SCSI LUN (size) or
> options to write to it?

Looking at the log, the installer has not made much progress yet. We
just successfully(!) probed a few SCSI disks, but haven't configured any
partitioning, let alone mount points. I take it that the installer must
not write to any real disk at that point in time. So ENOSPC cannot come
from zfcp-attached SCSI disks. Let's not get hung up on zfcp or on
different FCP-attached storage arrays (DS8000, XIV, FlashSystem, etc.);
they all present standard SCSI disks for which the common code Linux
kernel driver sd_mod provides regular block devices; nothing special
about this at all.

BTW, the kernel boot parameters look odd:

[    0.440956] Kernel command line:
@```@%@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@finnegan at us.ibm.com, what exact parm file content did you use to boot the installer?
Since the network interface ence0f appears without DPM auto conf being used and I don't see it being configured interactively in the installer, I wonder where its ccwgroup configuration came from. Maybe the parm file had enough leading zeros to get truncated during kernel console output, but maybe there was some boot parameter to group 0.0.0e0f,0.0.0e10,0.0.0e11 for ence0f?

(In reply to comment #29)
> host_installer_shell_cmds_04062023_1.txt
> Note after chzdev --enable,  Quantity 1969 files generated in /var/log/crash
> filling up /
> ls -l /var/crash
> ls -l | grep unknown | wc -l
> 1969
...
>  142575 Apr  6 12:18 1680808725.929860353.unknown.crash.gz
>      77 Apr  6 12:18 1680808725.929860353.unknown.meta.gz
>  162995 Apr  6 12:18 1680808726.069142342.unknown.crash.gz
...

> root at ubuntu-server:~# df -T
> Filesystem     Type    1K-blocks     Used Available Use% Mounted on
> /cow           overlay  16473348 16473348         0 100% /
> overlay        overlay    292992   292992         0 100% /media/filesystem
> overlay        overlay    292992   292992         0 100% /tmp/tmpcsrrjbgt/root.dir

I see ENOSPC also when the installer tries to log something. I assume this must happen towards some space in the ramdisk the installer runs within.
There seem to be a number of (too many?) installer "crash" files under /var/crash likely on the completely filled up overlay-fs.
Those "crash" files are neither created by chzdev nor lszdev.

However, if I read the logs correctly, these debug data files consuming
too much space only get generated due to other earlier python tracebacks
from subiquity. IOW, ENOSPC (or EMFILE) errors are just misleading
follow-on errors.

The very first one of those tracebacks happens on udev settle for the
network device (before any zfcp devices):

2023-04-06 19:17:21,023 DEBUG subiquity.server.controllers.filesystem:671 waiting 0.1 to let udev event queue settle
2023-04-06 19:17:21,124 DEBUG subiquitycore.utils:64 run_command called: ['udevadm', 'settle', '-t', '0']
2023-04-06 19:17:21,139 DEBUG subiquitycore.utils:77 run_command ['udevadm', 'settle', '-t', '0'] exited with code 0
2023-04-06 19:17:21,139 ERROR subiquity.server.server:424 top level error
Traceback (most recent call last):
File "/snap/subiquity/4383/usr/lib/python3.8/asyncio/events.py", line 81, in _run
self._context.run(self._callback, *self._args)
File "/snap/subiquity/4383/lib/python3.8/site-packages/subiquity/server/controllers/filesystem.py", line 682, in _udev_event
action, dev = self._monitor.receive_device()
File "/snap/subiquity/4383/lib/python3.8/site-packages/pyudev/monitor.py", line 400, in receive_device
device = self.poll()
File "/snap/subiquity/4383/lib/python3.8/site-packages/pyudev/monitor.py", line 358, in poll
if eintr_retry_call(poll.Poll.for_events((self, "r")).poll, timeout):
File "/snap/subiquity/4383/lib/python3.8/site-packages/pyudev/_util.py", line 164, in eintr_retry_call
return func(*args, **kwargs)
File "/snap/subiquity/4383/lib/python3.8/site-packages/pyudev/_os/poll.py", line 94, in poll
return list(self._parse_events(eintr_retry_call(self._notifier.poll, timeout)))
File "/snap/subiquity/4383/lib/python3.8/site-packages/pyudev/_os/poll.py", line 109, in _parse_events
raise IOError("Error while polling fd: {0!r}".format(fd))
OSError: Error while polling fd: 20
2023-04-06 19:17:21,142 DEBUG subiquity.common.errorreport:384 generating crash report
2023-04-06 19:17:21,143 INFO subiquity.common.errorreport:406 saving crash report 'unknown error crashed with OSError' to /var/crash/1680808641.142762184.unknown.crash

This repeats (at 10Hz ?) often enough in the manual udev settle loop and
each iteration creates one of those "crash" files of considerable size.

Unfortunately, 1680808641.142762184.unknown.crash.gz and
1680808641.142762184.unknown.meta.gz (the other crash files show the
same traceback as above) do _not_ contain any more debug data than we
had originally provided (what subiquity printed on the console when
asking it to show debug data for the "unknown error").

So coming back to:
(In reply to comment #16)
> > Canonical, why did the installer get an error?
> >
> > Does the installer really have a busy(!) waiting loop calling udevadm settle
> > with zero timeout?
>
> Maybe it's not busy and instead driver by a poll/select loop (with its own
> timeout/sleep) in the installer and therefore called with zero timeout.
>
> > But even if so, with the number of discovered devices and the settle finally
> > returning with success errorlevel 0, it should just work?

Maybe you could share a link to the corresponding source code of
subiquity performing the udev settle?

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https://bugs.launchpad.net/bugs/2009141

Title:
  [UBUNTU 22.04] OS installer exits for zfcp 32G adapter with an unknown
  error. An error occurred during installation

Status in Ubuntu on IBM z Systems:
  Triaged
Status in subiquity package in Ubuntu:
  Triaged

Bug description:
  Bug Description:
  Installation of Ubuntu 22.04 on s390x failed with an unknown error just after having successfully activated a zfcp HBA with Fibre-Channel-attached SCSI disks.

  I do see 0.0.100d successfully being online and having paths attached:
                     zfcp-host
                     0.0.100d                               online             ?
                     0x500173800cef0111:0x0000000000000000          sg16                                                                                               
                     0x500173800cef0111:0x0001000000000000          sdp sg17                                                                                           
                     0x500173800cef0111:0x0002000000000000          sdq sg18
  [host.ilabg13_9.11.116.213_ubuntu-22.04_ssh_installer.txt lines 41-41/9373 byte 238696/1146881 21%]

  But immediately after that, the installer reports an error:

                     An error occurred during installation

  ??????????????????????????????????????????????????????????????????????????
  ?subiquity/Early/apply_autoinstall_config                                                                                                        
  ?subiquity/Reporting/apply_autoinstall_config                                                                                                    
  ?subiquity/Error/apply_autoinstall_config                                                                                                        
  ?subiquity/Userdata/apply_autoinstall_config                                                                                                     
  ?subiquity/Package/apply_autoinstall_config                                                                                                      
  ?subiquity/Debconf/apply_autoinstall_config                                                                                                      
  ?subiquity/Kernel/apply_autoinstall_config                                                                                                       
  ?subiquity/Late/apply_autoinstall_config                                                                                                                                  ??????????????????????????????????????????????????????????????????????????
  ?  Sorry, an unknown error occurred.                                     ?
  ?  Information is being collected from the system that will help the     ?
  ?  developers diagnose the report.                                       |

  It looks like there was some ascii art progress bar while data was
  collected and then the dialog updated to:

  ?                       [ View full report      ]                        ?
  ?  If you want to help improve the installer, you can send an error      ?
  ?  report.                                                               ?
  ?                       [ Send to Canonical     ]                        ?
  ?                       [ Close report          ]                        |

  Next "View full report" was selected?

  ProblemType: Bug
  Architecture: s390x
  CrashDB: {'impl': 'launchpad', 'project': 'subiquity'}
  CurrentDmesg:
   [    0.093997] Linux version 5.15.0-43-generic (buildd at bos02-s390x-005) (gcc (Ubuntu 11.2.0-19ubuntu1) 11.2.0, GNU ld (GNU Binutils for Ubuntu) 2.38) #46-Ubuntu SMP Tue Jul 12 12:40:17 UTC 2022 (Ubuntu 5.15.0-43.46-generic 5.15.39)
   [    0.094001] setup: Linux is running as a z/VM guest operating system in 64-bit mode

   [    0.360759] Kernel command line:
  ip=9.11.116.213::9.11.116.1:255.255.255.0:ilabg13:ence0f:none:9.11.227.25
  https://cdimage.ubuntu.com/releases/jammy/release/ubuntu-22.04.1-live-
  server-s39

   [ 2677.003438] zfcp 0.0.100d: qdio: ZFCP on SC 10 using AI:1 QEBSM:1 PRI:1 TDD:1 SIGA: W 
   [ 2677.032397] scsi host0: zfcp
   [ 2677.060025] scsi 0:0:0:0: RAID              IBM      2810XIV-LUN-0    0000 PQ: 0 ANSI: 5
   [ 2677.061097] scsi 0:0:0:0: alua: disable for non-disk devices
   [ 2677.061134] scsi 0:0:0:0: Attached scsi generic sg0 type 12
   [ 2677.062988] scsi 0:0:0:1: Direct-Access     IBM      2810XIV          0000 PQ: 0 ANSI: 5
   [ 2677.064628] scsi 0:0:0:1: alua: supports implicit TPGS
   [ 2677.064632] scsi 0:0:0:1: alua: device naa.6001738cfc900cef0000000000013596 port group 0 rel port 301
   [ 2677.064679] sd 0:0:0:1: Attached scsi generic sg1 type 0

  ==> zfcp could successfully set 0.0.100d online and automatic LUN scan
  worked.

   [ 2677.513028] sd 0:0:16:1074020357: [sdac] Attached SCSI disk
   [ 2677.522641] sd 0:0:16:1074020356: [sdab] Attached SCSI disk
   [ 2677.522677] sd 0:0:15:1074020357: [sdaa] Attached SCSI disk
   [ 2677.522693] sd 0:0:15:1074020356: [sdz] Attached SCSI disk
   [ 2678.660373] device-mapper: multipath service-time: version 0.3.0 loaded
  Date: Wed Jan 18 21:04:03 2023
  DistroRelease: Ubuntu 22.04
  ExecutablePath: /snap/subiquity/3699/lib/python3.8/site-packages/subiquity/cmd/server.py
  InstallerServerLog:
   2023-01-18 20:23:57,901 INFO subiquity:112 Starting Subiquity server revision 3699

   2023-01-18 21:02:53,381 DEBUG root:39 start: subiquity/Zdev/GET: 
   2023-01-18 21:02:53,381 DEBUG subiquitycore.utils:64 run_command called: ['lszdev', '--quiet', '--pairs', '--columns', 'id,type,on,exists,pers,auto,failed,names']
   2023-01-18 21:02:53,405 DEBUG subiquitycore.utils:77 run_command ['lszdev', '--quiet', '--pairs', '--columns', 'id,type,on,exists,pers,auto,failed,names'] exited with code 0
   2023-01-18 21:02:53,406 DEBUG root:39 finish: subiquity/Zdev/GET: SUCCESS: 200 [{"id": "0.0.0009", "type": "generic-ccw", "on": true, "exists": true, "pers"...
   2023-01-18 21:02:53,414 INFO aiohttp.access:233  [18/Jan/2023:21:02:53 +0000] "GET /zdev HTTP/1.1" 200 2059 "-" "Python/3.8 aiohttp/3.6.2"
   2023-01-18 21:03:06,492 DEBUG subiquitycore.utils:64 run_command called: ['udevadm', 'settle', '-t', '0']
   2023-01-18 21:03:06,534 DEBUG subiquitycore.utils:77 run_command ['udevadm', 'settle', '-t', '0'] exited with code 0
   2023-01-18 21:03:06,534 DEBUG probert.network:585 event for addr_change: CHANGE {'ifindex': 2, 'flags': 768, 'family': 10, 'scope': 0, 'local': b'2002:90b:e006:116:76:54ff:fe00:5/64'}
   2023-01-18 21:03:06,534 DEBUG probert.network:717 addr_change CHANGE {'ifindex': 2, 'flags': 768, 'family': 10, 'scope': 0, 'local': b'2002:90b:e006:116:76:54ff:fe00:5/64'}
   2023-01-18 21:03:06,534 DEBUG root:39 start: subiquity/Network/_send_update: CHANGE ence0f
   2023-01-18 21:03:06,534 DEBUG subiquity.server.controllers.network:354 dev_info ence0f {'addresses': ['9.11.116.213/24'], 'gateway4': '9.11.116.1', 'nameservers': {'addresses': ['9.11.227.25']}}
   2023-01-18 21:03:06,535 DEBUG root:39 finish: subiquity/Network/_send_update: SUCCESS: CHANGE ence0f
   2023-01-18 21:03:19,283 DEBUG subiquitycore.utils:64 run_command called: ['udevadm', 'settle', '-t', '0']
   2023-01-18 21:03:19,314 DEBUG subiquitycore.utils:77 run_command ['udevadm', 'settle', '-t', '0'] exited with code 0
   2023-01-18 21:03:19,314 DEBUG probert.network:585 event for addr_change: CHANGE {'ifindex': 2, 'flags': 768, 'family': 10, 'scope': 0, 'local': b'2002:90b:e006:116:76:54ff:fe00:5/64'}
   2023-01-18 21:03:19,314 DEBUG probert.network:717 addr_change CHANGE {'ifindex': 2, 'flags': 768, 'family': 10, 'scope': 0, 'local': b'2002:90b:e006:116:76:54ff:fe00:5/64'}
   2023-01-18 21:03:19,314 DEBUG root:39 start: subiquity/Network/_send_update: CHANGE ence0f
   2023-01-18 21:03:19,314 DEBUG subiquity.server.controllers.network:354 dev_info ence0f {'addresses': ['9.11.116.213/24'], 'gateway4': '9.11.116.1', 'nameservers': {'addresses': ['9.11.227.25']}}
   2023-01-18 21:03:19,314 DEBUG root:39 finish: subiquity/Network/_send_update: SUCCESS: CHANGE ence0f
   2023-01-18 21:03:59,037 DEBUG root:39 start: subiquity/Zdev/chzdev_POST: 
   2023-01-18 21:03:59,038 DEBUG subiquitycore.utils:92 arun_command called: ['chzdev', '--enable', '0.0.100d']
   2023-01-18 21:03:59,357 DEBUG subiquitycore.utils:64 run_command called: ['udevadm', 'settle', '-t', '0']
   2023-01-18 21:03:59,373 DEBUG subiquitycore.utils:77 run_command ['udevadm', 'settle', '-t', '0'] exited with code 1
   2023-01-18 21:03:59,373 DEBUG subiquity.server.controller.filesystem:495 waiting 0.1 to let udev event queue settle
  ... <<< some time with repeated udevadm settle >>> ...
   2023-01-18 21:04:02,984 DEBUG subiquitycore.utils:64 run_command called: ['udevadm', 'settle', '-t', '0']
   2023-01-18 21:04:02,986 DEBUG subiquitycore.utils:77 run_command ['udevadm', 'settle', '-t', '0'] exited with code 1
   2023-01-18 21:04:02,986 DEBUG subiquity.server.controller.filesystem:495 waiting 0.1 to let udev event queue settle
   2023-01-18 21:04:03,029 DEBUG subiquitycore.utils:101 arun_command ['chzdev', '--enable', '0.0.100d'] exited with code 0
   2023-01-18 21:04:03,029 DEBUG subiquitycore.utils:64 run_command called: ['lszdev', '--quiet', '--pairs', '--columns', 'id,type,on,exists,pers,auto,failed,names']
   2023-01-18 21:04:03,047 DEBUG subiquitycore.utils:77 run_command ['lszdev', '--quiet', '--pairs', '--columns', 'id,type,on,exists,pers,auto,failed,names'] exited with code 0
   2023-01-18 21:04:03,052 DEBUG root:39 finish: subiquity/Zdev/chzdev_POST: SUCCESS: 200 [{"id": "0.0.0009", "type": "generic-ccw", "on": true, "exists": true, "pers"...
   2023-01-18 21:04:03,052 INFO aiohttp.access:233  [18/Jan/2023:21:03:59 +0000] "POST /zdev/chzdev?action=%22enable%22&zdev=%7B%22id%22:+%220.0.100d%22,+%22type%22:+%22zfcp-host%22,+%22on%22:+false,+%22exists%22:+true,+%22pers%22:+false,+%22auto%22:+false,+%22failed%22:+false,+%22names%22:+%22%22%7D HTTP/1.1" 200 7956 "-" "Python/3.8 aiohttp/3.6.2"
   2023-01-18 21:04:03,087 DEBUG subiquitycore.utils:64 run_command called: ['udevadm', 'settle', '-t', '0']
   2023-01-18 21:04:03,114 DEBUG subiquitycore.utils:77 run_command ['udevadm', 'settle', '-t', '0'] exited with code 0
   2023-01-18 21:04:03,114 ERROR subiquity.server.server:416 top level error
   2023-01-18 21:04:03,114 ERROR subiquity.server.server:416 top level error
   Traceback (most recent call last):
     File "/snap/subiquity/3699/usr/lib/python3.8/asyncio/events.py", line 81, in _run
       self._context.run(self._callback, *self._args)
     File "/snap/subiquity/3699/lib/python3.8/site-packages/subiquity/server/controllers/filesystem.py", line 506, in _udev_event
       action, dev = self._monitor.receive_device()
     File "/snap/subiquity/3699/lib/python3.8/site-packages/pyudev/monitor.py", line 397, in receive_device
       device = self.poll()
     File "/snap/subiquity/3699/lib/python3.8/site-packages/pyudev/monitor.py", line 357, in poll
       if eintr_retry_call(poll.Poll.for_events((self, 'r')).poll, timeout):
     File "/snap/subiquity/3699/lib/python3.8/site-packages/pyudev/_util.py", line 163, in eintr_retry_call
       return func(*args, **kwargs)
     File "/snap/subiquity/3699/lib/python3.8/site-packages/pyudev/_os/poll.py", line 97, in poll
       return list(self._parse_events(eintr_retry_call(self._notifier.poll, timeout)))
     File "/snap/subiquity/3699/lib/python3.8/site-packages/pyudev/_os/poll.py", line 112, in _parse_events
       raise IOError('Error while polling fd: {0!r}'.format(fd))
   OSError: Error while polling fd: 20
   2023-01-18 21:04:03,116 DEBUG subiquitycore.common.errorreport:384 generating crash report
   2023-01-18 21:04:03,116 INFO subiquitycore.common.errorreport:406 saving crash report 'unknown error crashed with OSError' to /var/crash/1674075843.116781473.unknown.crash
   2023-01-18 21:04:03,117 INFO root:39 start: subiquity/ErrorReporter/1674075843.116781473.unknown/add_info: 
   2023-01-18 21:04:03,117 INFO root:39 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "ERROR", "confirming_tty": "", "error": {"state": "INCOMPLETE", "ba...
   2023-01-18 21:04:03,117 INFO root:39 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "ERROR", "confirming_tty": "", "error": {"state": "INCOMPLETE", "ba...
   2023-01-18 21:04:03,117 INFO root:39 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "ERROR", "confirming_tty": "", "error": {"state": "INCOMPLETE", "ba...
   2023-01-18 21:04:03,118 INFO root:39 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "ERROR", "confirming_tty": "", "error": {"state": "INCOMPLETE", "ba...
   2023-01-18 21:04:03,118 DEBUG subiquitycore.utils:64 run_command called: ['udevadm', 'settle', '-t', '0']
  InstallerServerLogInfo:

  InterpreterPath: /snap/subiquity/3699/usr/bin/python3.8

  UdevDb:
  ...
   P: /devices/css0/0.0.0010/0.0.100d
   L: 0
   E: DEVPATH=/devices/css0/0.0.0010/0.0.100d
   E: SUBSYSTEM=ccw
   E: DRIVER=zfcp
   E: CU_TYPE=1731
   E: CU_MODEL=03
   E: DEV_TYPE=1732
   E: DEV_MODEL=03
   E: MODALIAS=ccw:t1731m03dt1732dm03
  ...
   P: /devices/css0/0.0.0010/0.0.100d/host0/rport-0:0-0/target0:0:0/0:0:0:1/block/sda
   N: sda
   L: 0
   S: disk/by-path/ccw-0.0.100d-fc-0x500173800cef0131-lun-1
   S: disk/by-id/scsi-0IBM_2810XIV_host=ilabg13_tuc3_fcp_32G
   S: disk/by-id/scsi-36001738cfc900cef0000000000013596
   S: disk/by-id/wwn-0x6001738cfc900cef0000000000013596
   S: disk/by-uuid/da904d37-e306-4223-8fbb-9670357ca708
   S: disk/by-id/scsi-SIBM_2810XIV_6000CEF0000000000013596
   S: disk/by-id/scsi-1IBM_2810XIV_6000CEF0000000000013596
   ...
   E: DM_MULTIPATH_DEVICE_PATH=1
  ...
   P: /devices/css0/0.0.0010/0.0.100d/host0/rport-0:0-17/target0:0:17/0:0:17:1/block/sdae
   N: sdae
   L: 0
   S: disk/by-id/scsi-1IBM_FlashSystem-984026c6702d26c6-0000-007d-000294
   S: disk/by-id/scsi-SIBM_FlashSystem-9840_26c6702d26c6-0000-007d-000294
   S: disk/by-path/ccw-0.0.100d-fc-0x500507605e8b7271-lun-1
   S: disk/by-uuid/97c7452a-2f45-4f7b-9127-d63b4a34e1e4
   S: disk/by-id/scsi-36005076b19bcb49b180000007d000294
   S: disk/by-id/wwn-0x6005076b19bcb49b180000007d000294
   E: DEVPATH=/devices/css0/0.0.0010/0.0.100d/host0/rport-0:0-17/target0:0:17/0:0:17:1/block/sdae
   E: SUBSYSTEM=block
   E: DEVNAME=/dev/sdae
   E: DEVTYPE=disk
   E: DISKSEQ=43
   E: MAJOR=65
   E: MINOR=224
   E: USEC_INITIALIZED=2677514875
   E: DM_MULTIPATH_DEVICE_PATH=1
  ...
   P: /devices/css0/0.0.0010/0.0.100d/host0/rport-0:0-9/target0:0:9/0:0:9:1/block/sdo
   N: sdo
   L: 0
   S: disk/by-path/ccw-0.0.100d-fc-0x500507680b2541ba-lun-1
   S: disk/by-id/wwn-0x6005076400818089b000000000000157
   S: disk/by-id/scsi-36005076400818089b000000000000157
   S: disk/by-id/scsi-SIBM_2145_010020c0226cXX00
   S: disk/by-uuid/0fbe15bc-49fb-4a09-b9f2-269129fa9913
   E: DEVPATH=/devices/css0/0.0.0010/0.0.100d/host0/rport-0:0-9/target0:0:9/0:0:9:1/block/sdo
   E: SUBSYSTEM=block
   E: DEVNAME=/dev/sdo
   E: DEVTYPE=disk
   E: DISKSEQ=27
   E: MAJOR=8
   E: MINOR=224
   E: USEC_INITIALIZED=2677616364
   E: DM_MULTIPATH_DEVICE_PATH=1

  ==> Probably the last discovered SCSI LUN.

   P: /devices/virtual/block/dm-0
   N: dm-0
   L: 50
   S: disk/by-id/scsi-360050762198c1fc2180000000b000132
   S: disk/by-id/wwn-0x60050762198c1fc2180000000b000132
   S: disk/by-id/dm-name-mpatha
   S: disk/by-id/dm-uuid-mpath-360050762198c1fc2180000000b000132
   S: mapper/mpatha
   E: DEVPATH=/devices/virtual/block/dm-0
   E: SUBSYSTEM=block
   E: DEVNAME=/dev/dm-0
   E: DEVTYPE=disk
   E: DISKSEQ=44
   E: MAJOR=253
   E: MINOR=0
   E: USEC_INITIALIZED=2678671661
   E: DM_UDEV_DISABLE_LIBRARY_FALLBACK_FLAG=1
   E: DM_UDEV_PRIMARY_SOURCE_FLAG=1
   E: DM_ACTIVATION=1
   E: DM_NAME=mpatha
   E: DM_UUID=mpath-360050762198c1fc2180000000b000132
   E: DM_SUSPENDED=0
   E: DM_UDEV_RULES=1
   E: DM_UDEV_RULES_VSN=2
   E: MPATH_SBIN_PATH=/sbin
   E: MPATH_DEVICE_READY=1

  ==> Multipath devices also got assembled.

  Canonical, why did the installer get an error?

  Does the installer really have a busy(!) waiting loop calling udevadm settle with zero timeout?
  But even if so, with the number of discovered devices and the settle finally returning with success errorlevel 0, it should just work?

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