[Bugs] [Bug 1429773] disallow increasing replica count for arbiter volumes

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1429773



--- Comment #2 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: https://review.gluster.org/16863 committed in release-3.10 by
Shyamsundar Ranganathan (srangana at redhat.com) 
------
commit 0c05761bcffaddaadfdd9f954609a9323ce87b24
Author: Ravishankar N <ravishankar at redhat.com>
Date:   Mon Feb 27 13:51:09 2017 +0530

    glusterd: disallow increasing replica count for arbiter volumes

    Problem: add-brick command to increase replica count in an arbiter
    volume succeeds, causing undesirable effects like the 4th brick being
    loaded with the arbiter xlator, the 3rd one losing the arbiter xlator
    (when the brick process is restarted), arbitration logic in afr going
    for a toss etc.

    Fix: Arbiter configuration should always be a replica 3 volume (of
    which 3rd brick is arbiter). Hence disallow increasing replica count for
    arbiter volume configurations.

    > Reviewed-on: https://review.gluster.org/16845
    > Smoke: Gluster Build System <jenkins at build.gluster.org>
    > NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    > CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    > Reviewed-by: Atin Mukherjee <amukherj at redhat.com>
    (cherry picked from commit b7ba77ab3ffb641d06223f7af5145d3d670b032a)

    Change-Id: I9fe4edac880d0f711e6d44324ad5562974e53e51
    BUG: 1429773
    Signed-off-by: Ravishankar N <ravishankar at redhat.com>
    Reviewed-on: https://review.gluster.org/16863
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Atin Mukherjee <amukherj at redhat.com>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>

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