[Bugs] [Bug 1717819] New: Changes to self-heal logic w.r.t. detecting metadata split-brains

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1717819

            Bug ID: 1717819
           Summary: Changes to self-heal logic w.r.t. detecting metadata
                    split-brains
           Product: GlusterFS
           Version: mainline
            Status: ASSIGNED
         Component: replicate
          Assignee: ksubrahm at redhat.com
          Reporter: ksubrahm at redhat.com
                CC: bugs at gluster.org
  Target Milestone: ---
    Classification: Community



Description of problem:

We currently don't have a roll-back/undoing of post-ops if quorum is not met.
Though the FOP is still unwound with failure, the xattrs remain on the disk.
Due to these partial post-ops and partial heals (healing only when 2 bricks are
up), we can end up in metadata split-brain purely from the afr xattrs point of
view i.e each brick is blamed by atleast one of the others for metadata. These
scenarios are hit when there is frequent connect/disconnect of the client/shd
to the bricks.

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