[Bugs] [Bug 1730175] New: Seeing failure due to "getxattr err for dir [No data available]" in rebalance

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1730175

            Bug ID: 1730175
           Summary: Seeing failure due to "getxattr err for dir [No data
                    available]" in rebalance
           Product: GlusterFS
           Version: mainline
            Status: ASSIGNED
         Component: distribute
          Assignee: spalai at redhat.com
          Reporter: spalai at redhat.com
                CC: bugs at gluster.org
  Target Milestone: ---
    Classification: Community



Description of problem:
While running rebalance on a heterogeneous brick volume, saw failure in
rebalance due to "[2019-07-05 09:36:55.653538] E [MSGID: 109039]
[dht-common.c:4245:dht_find_local_subvol_cbk] 0-vol6-dht: getxattr err for dir
[No data available]" error.

How reproducible:
1/1

Steps to Reproduce:
1. Create a 2 brick volume, where brick1 is of 20G and brick2 of 5G
2. Fuse mount the volume on a client node.
3. Check the hash layout on the bricks.
4. Start running I/O from the mount point.
5. While the I/O is still in progress, disable the cluster.weighted-rebalance
volume option.
6. Let the I/O continue to run and add-brick of 10G to the volume.
7. Trigger rebalance on the volume.
8. Check hash layout on the back-end bricks.

Actual results:
Seeing failure in rebalance 

Expected results:
Rebalance should complete successfully.

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