[Bugs] [Bug 1625575] Prevent hangs while increasing replica-count/ replace-brick for directory hierarchy

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1625575

Worker Ant <bugzilla-bot at gluster.org> changed:

           What    |Removed                     |Added
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             Status|POST                        |MODIFIED



--- Comment #3 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: https://review.gluster.org/21084 committed in release-4.1 by
"Shyamsundar Ranganathan" <srangana at redhat.com> with a commit message-
cluster/afr: Delegate metadata heal with pending xattrs to SHD

Problem:
When metadata-self-heal is triggered on the mount, it blocks
lookup until metadata-self-heal completes. But that can lead
to hangs when lot of clients are accessing a directory which
needs metadata heal and all of them trigger heals waiting
for other clients to complete heal.

Fix:
Only when the heal is needed but the pending xattrs are not set,
trigger metadata heal that could block lookup. This is the only
case where different clients may give different metadata to the
clients without heals, which should be avoided.

Updates bz#1625575
Change-Id: I6089e9fda0770a83fb287941b229c882711f4e66
Signed-off-by: Pranith Kumar K <pkarampu at redhat.com>

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