zpool get attempts to look at non-vdevs resulting in errors

[RichardBelzer]

System information

Type	Version/Name
Distribution Name	Debian
Distribution Version	12.9
Kernel Version	6.1
Architecture	AMD64
OpenZFS Version	2.2.7

Describe the problem you're observing

I currently have a resilver operation in progress:

root@server:~# zpool status
  pool: tank
 state: DEGRADED
status: One or more devices is currently being resilvered.  The pool will
        continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
  scan: resilver in progress since Wed Jan 22 03:11:14 2025
        63.3T / 63.3T scanned, 18.6T / 63.3T issued at 1.16G/s
        3.10T resilvered, 29.37% done, 10:56:17 to go
config:

        NAME                       STATE     READ WRITE CKSUM
        tank                       DEGRADED     0     0     0
          raidz2-0                 DEGRADED     0     0     0
            drive1                 ONLINE       0     0     0
            drive2                 ONLINE       0     0     0
            drive3                 ONLINE       0     0     0
            replacing-3            DEGRADED     0     0     0
              7483274857294629346  UNAVAIL      0     0     0  was /dev/drive4/old
              drive4               ONLINE       0     0     0  (resilvering)
            drive5                 ONLINE       0     0     0
            drive6                 ONLINE       0     0     0

While resilvering, I decided to check the pool properties:

root@server:~# zpool get ashift tank all-vdevs
NAME       PROPERTY  VALUE   SOURCE
root-0     ashift    0       -
raidz2-0   ashift    12      -
drive1   ashift    12      -
drive2   ashift    12      -
drive3   ashift    12      -
cannot get vdev property name from replacing-3 in tank: invalid argument for this pool operation
cannot get vdev property ashift from replacing-3 in tank: invalid argument for this pool operation
7483274857294629346  ashift    12      -
drive4   ashift    12      -
drive5   ashift    12      -
drive6   ashift    12      -

The command attempted to look at replacing-3, which is not a valid vdev, resulting in "invalid argument" errors

Describe how to reproduce the problem

Run zpool get ashift tank all-vdevs while replacing a drive

[amotin]

IIRC the replacing-3 internally is actually a temporary mirror vdev. But it is a good question what does it miss to cause the errors.