[Gluster-devel] [Gluster-Maintainers] Master branch lock down: RCA for tests (bugs/distribute/bug-1122443.t)

Raghavendra Gowdappa rgowdapp at redhat.com
Mon Aug 13 01:54:50 UTC 2018 

Initial RCA to point out commit 7131de81f72dda0ef685ed60d0887c6e14289b8c
caused the issue was done by Nithya. Following was the conversation:

<snip>

With the latest master, I created a single brick volume and some files
    inside it.

    [root at rhgs313-6 ~]# umount -f /mnt/fuse1; mount -t glusterfs -s
    192.168.122.6:/thunder /mnt/fuse1; ls -l /mnt/fuse1/; echo "Trying
    again"; ls -l /mnt/fuse1
    umount: /mnt/fuse1: not mounted
    total 0
    ----------. 0 root root 0 Jan  1  1970 file-1
    ----------. 0 root root 0 Jan  1  1970 file-2
    ----------. 0 root root 0 Jan  1  1970 file-3
    ----------. 0 root root 0 Jan  1  1970 file-4
    ----------. 0 root root 0 Jan  1  1970 file-5
    d---------. 0 root root 0 Jan  1  1970 subdir
    Trying again
    total 3
    -rw-r--r--. 1 root root 33 Aug  3 14:06 file-1
    -rw-r--r--. 1 root root 33 Aug  3 14:06 file-2
    -rw-r--r--. 1 root root 33 Aug  3 14:06 file-3
    -rw-r--r--. 1 root root 33 Aug  3 14:06 file-4
    -rw-r--r--. 1 root root 33 Aug  3 14:06 file-5
    d---------. 0 root root  0 Jan  1  1970 subdir
    [root at rhgs313-6 ~]#

    Conversation can be followed on gluster-devel on thread with subj:
    tests/bugs/distribute/bug-1122443.t - spurious failure. git-bisected
    pointed this patch as culprit.
</snip>

commit 7131de81f72dda0ef685ed60d0887c6e14289b8c zeroed out all members of
iatt except for ia_gfid and ia_type in certain scenarios (one case that led
to this bug was when a fresh inode - not linked - was picked up by
readdirplus). This led to fuse_readdirp_cbk to wrongly think it has a valid
stat (due to valid ia_gfid and ia_type) and give to kernel zeroed out
attributes causing failures. Fix is included in
https://review.gluster.org/20639 to make sure to let kernel know attributes
are not valid in this scenario (and not zero out stats even if inode picked
up by readdirplus is not linked yet).

regards,
Raghavendra

On Mon, Aug 13, 2018 at 6:12 AM, Shyam Ranganathan <srangana at redhat.com>
wrote:

> As a means of keeping the focus going and squashing the remaining tests
> that were failing sporadically, request each test/component owner to,
>
> - respond to this mail changing the subject (testname.t) to the test
> name that they are responding to (adding more than one in case they have
> the same RCA)
> - with the current RCA and status of the same
>
> List of tests and current owners as per the spreadsheet that we were
> tracking are:
>
> ./tests/basic/distribute/rebal-all-nodes-migrate.t              TBD
> ./tests/basic/tier/tier-heald.t         TBD
> ./tests/basic/afr/sparse-file-self-heal.t               TBD
> ./tests/bugs/shard/bug-1251824.t                TBD
> ./tests/bugs/shard/configure-lru-limit.t                TBD
> ./tests/bugs/replicate/bug-1408712.t    Ravi
> ./tests/basic/afr/replace-brick-self-heal.t             TBD
> ./tests/00-geo-rep/00-georep-verify-setup.t     Kotresh
> ./tests/basic/afr/gfid-mismatch-resolution-with-fav-child-policy.t Karthik
> ./tests/basic/stats-dump.t              TBD
> ./tests/bugs/bug-1110262.t              TBD
> ./tests/basic/ec/ec-data-heal.t         Mohit
> ./tests/bugs/replicate/bug-1448804-check-quorum-type-values.t
>  Pranith
> ./tests/bugs/snapshot/bug-1482023-snpashot-issue-with-
> other-processes-accessing-mounted-path.t
> TBD
> ./tests/basic/ec/ec-5-2.t               Sunil
> ./tests/bugs/shard/bug-shard-discard.t          TBD
> ./tests/bugs/glusterd/remove-brick-testcases.t          TBD
> ./tests/bugs/protocol/bug-808400-repl.t         TBD
> ./tests/bugs/quick-read/bug-846240.t            Du
> ./tests/bugs/replicate/bug-1290965-detect-bitrotten-objects.t
>  Mohit
> ./tests/00-geo-rep/georep-basic-dr-tarssh.t     Kotresh
> ./tests/bugs/ec/bug-1236065.t           Pranith
> ./tests/00-geo-rep/georep-basic-dr-rsync.t      Kotresh
> ./tests/basic/ec/ec-1468261.t           Ashish
> ./tests/basic/afr/add-brick-self-heal.t         Ravi
> ./tests/basic/afr/granular-esh/replace-brick.t          Pranith
> ./tests/bugs/core/multiplex-limit-issue-151.t           Sanju
> ./tests/bugs/glusterd/validating-server-quorum.t                Atin
> ./tests/bugs/replicate/bug-1363721.t            Ravi
> ./tests/bugs/index/bug-1559004-EMLINK-handling.t                Pranith
> ./tests/bugs/replicate/bug-1433571-undo-pending-only-on-up-bricks.t
>        Karthik
> ./tests/bugs/glusterd/add-brick-and-validate-replicated-volume-options.t
>         Atin
> ./tests/bugs/glusterd/rebalance-operations-in-single-node.t
>  TBD
> ./tests/bugs/replicate/bug-1386188-sbrain-fav-child.t           TBD
> ./tests/bitrot/bug-1373520.t    Kotresh
> ./tests/bugs/distribute/bug-1117851.t   Shyam/Nigel
> ./tests/bugs/glusterd/quorum-validation.t       Atin
> ./tests/bugs/distribute/bug-1042725.t           Shyam
> ./tests/bugs/replicate/bug-1586020-mark-dirty-for-entry-
> txn-on-quorum-failure.t
>         Karthik
> ./tests/bugs/quota/bug-1293601.t                TBD
> ./tests/bugs/bug-1368312.t      Du
> ./tests/bugs/distribute/bug-1122443.t           Du
> ./tests/bugs/core/bug-1432542-mpx-restart-crash.t       1608568
> Nithya/Shyam
>
> Thanks,
> Shyam
> _______________________________________________
> maintainers mailing list
> maintainers at gluster.org
> https://lists.gluster.org/mailman/listinfo/maintainers
>
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