REVIEW: http://review.gluster.org/8154 (cluster/afr: Fix resolution issues with afr) posted (#1) for review on release-3.5 by Pranith Kumar Karampuri (pkarampu)
COMMIT: http://review.gluster.org/8154 committed in release-3.5 by Niels de Vos (ndevos) ------ commit 5d2603c75bfd78c8b33903a20e844430276e7539 Author: Pranith Kumar K <pkarampu> Date: Mon Jun 23 21:35:29 2014 +0530 cluster/afr: Fix resolution issues with afr Problem with afr: Lets say there is a directory hierarchy a/b/c/d on the mount and the user is cd'ed into the directory. Bring down one of the bricks of replica and remove all directories/files to simulate disk replacement on that brick. Now this brick is brought back up. Creates on the cd'ed directory fail with ESTALE. Basically before sending a create of 'f' inside 'd', fuse sends a lookup to make sure the file is not present. On one of the bricks 'd' is present and 'f' is not so it sends ENOENT as response. On the new brick 'd' itself is not present. So it sends ESTALE. In afr ESTALE is considered to be special errno on witnessing which lookup has to fail. And ESTALE is given more priority than ENOENT. Due to these reasons lookup fails with ESTALE rather than ENOENT. Since lookup didn't fail with ENOENT, 'create' can't be issued so the command is failed with ESTALE. Solution: Afr needs to consider ESTALE errno normally and ENOENT needs to be given more priority so that operations like create can proceed even when only one of the brick is up and running. Whenever client xlator identifies that gfid-changed, it sets that information in lookup xdata. Afr uses this information to fail the lookup with ESTALE so that top xlator can send fresh lookup. Change-Id: Ie8e0e327542fd644409eb5dadf451679afa1c0e5 BUG: 1112348 Signed-off-by: Pranith Kumar K <pkarampu> Reviewed-on: http://review.gluster.org/8154 Tested-by: Justin Clift <justin> Tested-by: Gluster Build System <jenkins.com> Reviewed-by: Ravishankar N <ravishankar> Reviewed-by: Niels de Vos <ndevos>
The first (and last?) Beta for GlusterFS 3.5.2 has been released [1]. Please verify if the release solves this bug report for you. In case the glusterfs-3.5.2beta1 release does not have a resolution for this issue, leave a comment in this bug and move the status to ASSIGNED. If this release fixes the problem for you, leave a note and change the status to VERIFIED. Packages for several distributions should become available in the near future. Keep an eye on the Gluster Users mailinglist [2] and the update (possibly an "updates-testing" repository) infrastructure for your distribution. [1] http://supercolony.gluster.org/pipermail/gluster-devel/2014-July/041636.html [2] http://supercolony.gluster.org/pipermail/gluster-users/
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-3.5.2, please reopen this bug report. glusterfs-3.5.2 has been announced on the Gluster Users mailinglist [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://supercolony.gluster.org/pipermail/gluster-users/2014-July/041217.html [2] http://thread.gmane.org/gmane.comp.file-systems.gluster.user