[Bugs] [Bug 1154491] split-brain reported on files whose change-logs are all zeros

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1154491



--- Comment #1 from Pranith Kumar K <pkarampu at redhat.com> ---
Steps to Reproduce: (Not sure of the exact steps which led to this issue. Here
are the steps performed)
===============================================================================
1. Create 2 x 2 distribute-replicate volume. Start the volume

2. Create 2 fuse and 2 nfs mounts from 2 client machines. 

3. Start the script on fuse mounts from each client.

"./create_dirs_files_multi_thread.py --number-of-threads 100
--num-files-per-dir 25 --min-file-size 1024 --max-file-size 10240
--starting-dir-num 1 --dir-depth 5 --dir-width 4" 

"./create_dirs_files_multi_thread.py --number-of-threads 100
--num-files-per-dir 25 --min-file-size 1024 --max-file-size 10240
--starting-dir-num 101 --dir-depth 5 --dir-width 4"

4. While creation is in process, bring down brick1 and brick4. (crashed the
brick devices using godown xfstests utility)

5. Start the script on nfs mounts from each client.

"./create_dirs_files_multi_thread.py --number-of-threads 100
--num-files-per-dir 25 --min-file-size 1024 --max-file-size 10240
--starting-dir-num 1 --dir-depth 5 --dir-width 4" 

"./create_dirs_files_multi_thread.py --number-of-threads 100
--num-files-per-dir 25 --min-file-size 1024 --max-file-size 10240
--starting-dir-num 101 --dir-depth 5 --dir-width 4"

6. On the other fuse mount from both the clients execute: "find . -type d | wc"

7. On the other nfs mount from both the clients execute : "find . -type f | wc"

6. Add 4 bricks to the volume to make it 4 x 2 dis-rep volume.

7. bring back the bricks brick1, brick4.

8. start rebalance. 

9. while rebalance is in progress, renames files.

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