[Bugs] [Bug 1721783] New: ctime changes: tar still complains file changed as we read it if uss is enabled

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1721783

            Bug ID: 1721783
           Summary: ctime changes:  tar still complains file changed as we
                    read it if uss is enabled
           Product: GlusterFS
           Version: mainline
            Status: NEW
         Component: ctime
          Severity: high
          Priority: medium
          Assignee: bugs at gluster.org
          Reporter: khiremat at redhat.com
                CC: amukherj at redhat.com, bugs at gluster.org,
                    jthottan at redhat.com, khiremat at redhat.com,
                    nchilaka at redhat.com, pasik at iki.fi, rabhat at redhat.com,
                    rhinduja at redhat.com, rhs-bugs at redhat.com,
                    rkavunga at redhat.com, sankarshan at redhat.com,
                    storage-qa-internal at redhat.com, vdas at redhat.com
        Depends On: 1709301, 1720290
  Target Milestone: ---
    Classification: Community



+++ This bug was initially created as a clone of Bug #1720290 +++

Description of problem:
==================
With uss enabled on gluster volume, when compressing a directory of files into
a tar ball, I still see tar complaining "file changed as we read it"


How reproducible:
==================
always on my testbed

Steps to Reproduce:
===============
1.created a 4x3 volume 
2. enabled uss and quotas
3. mounted volume on 4 clients and started to untar kernel image and again
tarball the image.

When tarballing the files back, i see the above issue consistently


Volume Name: nfnas
Type: Distributed-Replicate
Volume ID: 61b5239a-e275-4a1a-b02e-65625c4dc3fd
Status: Started
Snapshot Count: 0
Number of Bricks: 4 x 3 = 12
Transport-type: tcp
Bricks:
Brick1: rhs-gp-srv7.lab.eng.blr.redhat.com:/gluster/brick1/nfnas
Brick2: rhs-gp-srv8.lab.eng.blr.redhat.com:/gluster/brick1/nfnas
Brick3: rhs-gp-srv9.lab.eng.blr.redhat.com:/gluster/brick1/nfnas
Brick4: rhs-gp-srv8.lab.eng.blr.redhat.com:/gluster/brick2/nfnas
Brick5: rhs-gp-srv9.lab.eng.blr.redhat.com:/gluster/brick2/nfnas
Brick6: rhs-gp-srv10.lab.eng.blr.redhat.com:/gluster/brick1/nfnas
Brick7: rhs-gp-srv9.lab.eng.blr.redhat.com:/gluster/brick3/nfnas
Brick8: rhs-gp-srv10.lab.eng.blr.redhat.com:/gluster/brick3/nfnas
Brick9: rhs-gp-srv7.lab.eng.blr.redhat.com:/gluster/brick3/nfnas
Brick10: rhs-gp-srv10.lab.eng.blr.redhat.com:/gluster/brick4/nfnas
Brick11: rhs-gp-srv7.lab.eng.blr.redhat.com:/gluster/brick4/nfnas
Brick12: rhs-gp-srv8.lab.eng.blr.redhat.com:/gluster/brick4/nfnas
Options Reconfigured:
diagnostics.client-log-level: DEBUG
performance.stat-prefetch: on
features.uss: disable
features.quota-deem-statfs: on
features.inode-quota: on
features.quota: on
transport.address-family: inet
nfs.disable: on
performance.client-io-threads: off

--- Additional comment from Worker Ant on 2019-06-13 17:21:21 UTC ---

REVIEW: https://review.gluster.org/22861 (uss: Fix tar issue with ctime and uss
enabled) posted (#1) for review on master by Kotresh HR

--- Additional comment from Worker Ant on 2019-06-17 10:29:50 UTC ---

REVIEW: https://review.gluster.org/22861 (uss: Fix tar issue with ctime and uss
enabled) merged (#3) on master by Amar Tumballi


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1709301
[Bug 1709301] ctime changes:  tar still complains file changed as we read it if
uss is enabled
https://bugzilla.redhat.com/show_bug.cgi?id=1720290
[Bug 1720290] ctime changes:  tar still complains file changed as we read it if
uss is enabled
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