[Bugs] [Bug 1386188] Asynchronous Unsplit-brain still causes Input/ Output Error on system calls

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1386188



--- Comment #10 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: http://review.gluster.org/15673 committed in master by Pranith Kumar
Karampuri (pkarampu at redhat.com) 
------
commit a07ddd8fcc8dcdcf7ccfa61211d258f13b9f9229
Author: Ravishankar N <ravishankar at redhat.com>
Date:   Sat Nov 26 21:24:01 2016 +0530

    afr: allow I/O when favorite-child-policy is enabled

    Problem:
    Currently, I/O on a split-brained file fails even when the
    favorite-child-policy is set until the self-heal is complete.

    Fix:
    If a valid 'source' is found using the set favorite-child-policy, inspect
    and reset the afr pending xattrs on the 'sinks' (inside appropriate locks),
    refresh the inode and then proceed with the read or write transaction.

    The resetting itself happens in the self-heal code and hence can also
    happen in the client side background-heal or by the shd's index-heal in
    addition to the txn code path explained above. When it happens in via
    heal, we also add checks in undo-pending to not reset the sink xattrs
    again.

    Change-Id: Ic8c1317720cb26bd114b6fe6af4e58c73b864626
    BUG: 1386188
    Signed-off-by: Ravishankar N <ravishankar at redhat.com>
    Reported-by: Simon Turcotte-Langevin <simon.turcotte-langevin at ubisoft.com>
    Reviewed-on: http://review.gluster.org/15673
    Tested-by: Pranith Kumar Karampuri <pkarampu at redhat.com>
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Pranith Kumar Karampuri <pkarampu 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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