Bug 1544635 - Though files are in split-brain able to perform writes to the file
Summary: Though files are in split-brain able to perform writes to the file
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: GlusterFS
Classification: Community
Component: replicate
Version: 3.12
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Karthik U S
QA Contact:
URL:
Whiteboard:
Depends On: 1294051
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-02-13 05:47 UTC by Karthik U S
Modified: 2018-04-06 11:06 UTC (History)
5 users (show)

Fixed In Version: glusterfs-3.12.7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1294051
Environment:
Last Closed: 2018-04-06 11:06:55 UTC
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Embargoed:

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Comment 1 Worker Ant 2018-02-13 05:48:22 UTC 
REVIEW: https://review.gluster.org/19554 (cluster/afr: Fail open on split-brain) posted (#1) for review on release-3.12 by Karthik U S
Comment 2 Worker Ant 2018-03-08 06:40:25 UTC 
COMMIT: https://review.gluster.org/19554 committed in release-3.12 by "jiffin tony Thottan" <jthottan> with a commit message- cluster/afr: Fail open on split-brain

Problem:
Append on a file with split-brain succeeds. Open is intercepted by open-behind,
when write comes on the file, open-behind does open+write. Open succeeds
because afr doesn't fail it. Then write succeeds because write-behind
intercepts it. Flush is also intercepted by write-behind, so the application
never gets to know that the write failed.

Fix:
Fail open on split-brain, so that when open-behind does open+write open fails
which leads to write failure. Application will know about this failure.

Change-Id: I4bff1c747c97bb2925d6987f4ced5f1ce75dbc15
BUG: 1544635
Signed-off-by: Pranith Kumar K <pkarampu>
(cherry picked from commit 786343abca3474ff01aa1017210112d97cbc4843)
Comment 3 Jiffin 2018-04-06 11:06:55 UTC 
This bug is getting closed because a release has been made available that should address the reported issue. In case the problem is still not fixed with glusterfs-3.12.7, please open a new bug report.

glusterfs-3.12.7 has been announced on the Gluster mailinglists [1], packages for several distributions should become available in the near future. Keep an eye on the Gluster Users mailinglist [2] and the update infrastructure for your distribution.

[1] http://lists.gluster.org/pipermail/maintainers/2018-March/004303.html
[2] https://www.gluster.org/pipermail/gluster-users/
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