[Gluster-devel] Afr handling dir fop failures on all nodes gracefully.

[Pranith Kumar K]

hi,
          Attaching the steps to re-create the issue.
As part of Entry transaction, before performing 
create/mknod/mkdir/rmdir/unlink/link/symlink/rename fops, afr takes 
appropriate entry locks and then performs pre-op. If the fop fails on 
all nodes then the changelog leaves the directory in 'FOOL' state. 
Because of this the subsequent self-heal will be conservative merge, 
which may bring back the files that were already deleted leading to 
duplicate entries across distribute subvolumes.

We need to improve afr-transaction to handle this case gracefully.

Sending this mail to start the discussion towards a solution. Please 
feel free to contribute.

Pranith.
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