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Date:      Sun, 23 Feb 2025 08:42:35 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 284978] zfs hangs importing pool
Message-ID:  <bug-284978-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D284978

            Bug ID: 284978
           Summary: zfs hangs importing pool
           Product: Base System
           Version: 14.2-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: bora.br@gmail.com

1. I have pool created in Linux
2. Pool was several times imported into FreeBSD 14.1 with -R option
3. After hard-reset of FreeBSD 14.1 any attempt to import=20
zpool import
zpool import thatpool
resulting in ZFS hangs: this zpool call and any subsequent call to zpool or=
 zfs
results in hang
4. I tried FreeBSD 14.1-p7 and FreeBSD 14.2-p1, the problem the same
5. core dump of FreeBSD 14.2 in the point of time after zpool import hangs
available here:
https://file.bbr.su/vmcore.rar
6. zpool import of this pool under linux (mint 22.1) works properly
7. zpool scrub reports no problems
8. pool properties under linux:

$ sudo zdb -l /dev/sdc1
------------------------------------
LABEL 0=20
------------------------------------
    version: 5000
    name: 'vddb'
    state: 1
    txg: 5751755
    pool_guid: 3510027880733637932
    errata: 0
    hostid: 3026739494
    hostname: 'bbr'
    top_guid: 10358742725710328746
    guid: 10358742725710328746
    vdev_children: 1
    vdev_tree:
        type: 'disk'
        id: 0
        guid: 10358742725710328746
        path: '/dev/sdd1'
        devid: 'ata-ST4000DM000-1F2168_Z300W173-part1'
        phys_path: 'id1,enc@n3061686369656d30/type@0/slot@6/elmdesc@Slot_05=
/p1'
        whole_disk: 1
        metaslab_array: 259
        metaslab_shift: 34
        ashift: 12
        asize: 3000600363008
        is_log: 0
        DTL: 398
        create_txg: 4
    features_for_read:
        com.delphix:hole_birth
        com.delphix:embedded_data
    labels =3D 0 1 2 3=20

$ sudo zpool import -R /mnt/1 vddb
$ sudo zpool get all vddb
NAME  PROPERTY                       VALUE                          SOURCE
vddb  size                           2.72T                          -
vddb  capacity                       78%                            -
vddb  altroot                        /mnt/1                         local
vddb  health                         ONLINE                         -
vddb  guid                           3510027880733637932            -
vddb  version                        -                              default
vddb  bootfs                         -                              default
vddb  delegation                     on                             default
vddb  autoreplace                    off                            default
vddb  cachefile                      none                           local
vddb  failmode                       wait                           default
vddb  listsnapshots                  off                            default
vddb  autoexpand                     off                            default
vddb  dedupratio                     1.00x                          -
vddb  free                           611G                           -
vddb  allocated                      2.12T                          -
vddb  readonly                       off                            -
vddb  ashift                         12                             local
vddb  comment                        -                              default
vddb  expandsize                     -                              -
vddb  freeing                        0                              -
vddb  fragmentation                  1%                             -
vddb  leaked                         0                              -
vddb  multihost                      off                            default
vddb  checkpoint                     -                              -
vddb  load_guid                      5959378565731041371            -
vddb  autotrim                       off                            default
vddb  compatibility                  off                            default
vddb  bcloneused                     0                              -
vddb  bclonesaved                    0                              -
vddb  bcloneratio                    1.00x                          -
vddb  feature@async_destroy          enabled                        local
vddb  feature@empty_bpobj            active                         local
vddb  feature@lz4_compress           active                         local
vddb  feature@multi_vdev_crash_dump  enabled                        local
vddb  feature@spacemap_histogram     active                         local
vddb  feature@enabled_txg            active                         local
vddb  feature@hole_birth             active                         local
vddb  feature@extensible_dataset     active                         local
vddb  feature@embedded_data          active                         local
vddb  feature@bookmarks              enabled                        local
vddb  feature@filesystem_limits      enabled                        local
vddb  feature@large_blocks           enabled                        local
vddb  feature@large_dnode            enabled                        local
vddb  feature@sha512                 enabled                        local
vddb  feature@skein                  enabled                        local
vddb  feature@edonr                  enabled                        local
vddb  feature@userobj_accounting     active                         local
vddb  feature@encryption             enabled                        local
vddb  feature@project_quota          active                         local
vddb  feature@device_removal         enabled                        local
vddb  feature@obsolete_counts        enabled                        local
vddb  feature@zpool_checkpoint       enabled                        local
vddb  feature@spacemap_v2            active                         local
vddb  feature@allocation_classes     enabled                        local
vddb  feature@resilver_defer         enabled                        local
vddb  feature@bookmark_v2            enabled                        local
vddb  feature@redaction_bookmarks    disabled                       local
vddb  feature@redacted_datasets      disabled                       local
vddb  feature@bookmark_written       disabled                       local
vddb  feature@log_spacemap           disabled                       local
vddb  feature@livelist               disabled                       local
vddb  feature@device_rebuild         disabled                       local
vddb  feature@zstd_compress          disabled                       local
vddb  feature@draid                  disabled                       local
vddb  feature@zilsaxattr             disabled                       local
vddb  feature@head_errlog            disabled                       local
vddb  feature@blake3                 disabled                       local
vddb  feature@block_cloning          disabled                       local
vddb  feature@vdev_zaps_v2           disabled                       local

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