[Bugs] [Bug 1293293] New: afr: warn if pending xattrs missing during init()

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1293293

            Bug ID: 1293293
           Summary: afr: warn if pending xattrs missing during init()
           Product: GlusterFS
           Version: mainline
         Component: replicate
          Assignee: bugs at gluster.org
          Reporter: ravishankar at redhat.com
                CC: bugs at gluster.org, gluster-bugs at redhat.com



Description of problem:

Since commit 6e635284a4411b816d4d860a28262c9e6dc4bd6a
glusterfs-3.7.7), the afr pending xattrs are stored in the volfile and used
by afr when it initializes. If a cluster is upgraded to 3.7.7 and the volfile
is not regenerated, AFR will crash.


How reproducible:
Always

Steps to Reproduce:
1. Create a 1x2 replica on glusterfs 3.7.6 on one node
2. Upgrade to 3.7.7, restart glusterd
3. gluster volume set all cluster.op-version 30707
4. start the volume and fuse mount it.

Actual results:
Fuse mount will crash

Expected results:
Should not crash

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