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  1. Lustre
  2. LU-10016

Downgrading Lustre 2.10.1 ZFS to 2.9.0 ZFS gives a pool cannot be found error on import

Details

    • Bug
    • Resolution: Cannot Reproduce
    • Critical
    • None
    • Lustre 2.10.1
    • trevis
    • 3
    • 9223372036854775807

    Description

      May be related to LU-9960. It fixed the "can't import into ZFS 6.5.7 because a 7.1 feature is installed" issue.

      Two downgrade tests:
      Downgrade 2.10.1 to 2.10.0: zfs 7.1 to zfs 6.5.9 - works
      Downgrade 2.10.1 to 2.9.0: zfs 7.1 to zfs 6.5.7 - pool not found

      Pool not found is seen with zpool import <pool name> and zpool import <pool GUID>.

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            [LU-10016] Downgrading Lustre 2.10.1 ZFS to 2.9.0 ZFS gives a pool cannot be found error on import

            Also passed in a 2.10.1 to 2.9.0 retest. Most likely user error. Closing.

            jcasper James Casper (Inactive) added a comment - Also passed in a 2.10.1 to 2.9.0 retest. Most likely user error. Closing.

            Downgrade from 2.10.1 to EE3 passed. Retesting 2.10.1 to 2.9.0. Will close on Monday if that passes.

            jcasper James Casper (Inactive) added a comment - Downgrade from 2.10.1 to EE3 passed. Retesting 2.10.1 to 2.9.0. Will close on Monday if that passes.

            I'm running another upgrade/downgrade test now (EE3 --> 2.10.1 --> EE3). EE3 also uses 6.5.7 ZFS, so if I don't see this issue there, I'll retest 2.9.0 --> 2.10.1 --> 2.9.0.

            jcasper James Casper (Inactive) added a comment - I'm running another upgrade/downgrade test now (EE3 --> 2.10.1 --> EE3). EE3 also uses 6.5.7 ZFS, so if I don't see this issue there, I'll retest 2.9.0 --> 2.10.1 --> 2.9.0.

            Can you show a bare zfs import from trevis-62 (via ZFS 0.6.5.7)?

            I assume this is Lustre 2.10.1-RC1 (so with the LU-9960 patch).

            utopiabound Nathaniel Clark added a comment - Can you show a bare zfs import from trevis-62 (via ZFS 0.6.5.7)? I assume this is Lustre 2.10.1-RC1 (so with the LU-9960 patch).
            [root@trevis-62 ~]# zpool import -f 11022747677743727868
            cannot import '11022747677743727868': no such pool available
            
            jcasper James Casper (Inactive) added a comment - [root@trevis-62 ~]# zpool import -f 11022747677743727868 cannot import '11022747677743727868': no such pool available

            James, do you have more information about the errors printed when this problem happens?

            adilger Andreas Dilger added a comment - James, do you have more information about the errors printed when this problem happens?
            pjones Peter Jones added a comment -

            Nathaniel

            Could you please advise?

            Thanks

            Peter

            pjones Peter Jones added a comment - Nathaniel Could you please advise? Thanks Peter

            People

              utopiabound Nathaniel Clark
              jcasper James Casper (Inactive)
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              Dates

                Created:
                Updated:
                Resolved: