[Bugs] [Bug 1327380] New: Random permission denied errors accessing files

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1327380

            Bug ID: 1327380
           Summary: Random permission denied errors accessing files
           Product: GlusterFS
           Version: 3.7.9
         Component: glusterd
          Severity: high
          Assignee: bugs at gluster.org
          Reporter: vitaliy at kievinfo.com
                CC: bugs at gluster.org



Description of problem:
Have a 2 x 2 = 4 Gluster fs volume. All 4 servers also have this volume mounted
using glusterfs fuse. One out of 3 servers started to have more and more
intermittent "Permission Denied" errors while accessing random files. Brick log
contains lots of these errors:
[2016-04-15 00:01:01.534700] E [MSGID: 115050]
[server-rpc-fops.c:178:server_lookup_cbk] 0-gv1-server: 51047: LOOKUP /natcm
(00000000-0000-0000-0000-000000000001/natcm) ==> (Permission denied)
[Permission denied]
[2016-04-15 00:01:01.537632] E [MSGID: 115050]
[server-rpc-fops.c:178:server_lookup_cbk] 0-gv1-server: 51049: LOOKUP /natcm
(00000000-0000-0000-0000-000000000001/natcm) ==> (Permission denied)
[Permission denied]
[2016-04-15 00:01:01.541006] E [MSGID: 115050]
[server-rpc-fops.c:178:server_lookup_cbk] 0-gv1-server: 51050: LOOKUP /natcm
(00000000-0000-0000-0000-000000000001/natcm) ==> (Permission denied)
[Permission denied]
[2016-04-15 00:01:01.543561] E [MSGID: 115050]
[server-rpc-fops.c:178:server_lookup_cbk] 0-gv1-server: 51053: LOOKUP /natcm
(00000000-0000-0000-0000-000000000001/natcm) ==> (Permission denied)
[Permission denied]

Mount log has these corresponding log entries:
[2016-04-15 02:40:01.740260] W [MSGID: 114031]
[client-rpc-fops.c:2974:client3_3_lookup_cbk] 0-gv1-client-2: remote operation
failed. Path: /natcm (7b917079-4e50-4f85-b50e-a152e8f39769) [Permission denied]
[2016-04-15 02:40:01.743183] W [MSGID: 114031]
[client-rpc-fops.c:2974:client3_3_lookup_cbk] 0-gv1-client-2: remote operation
failed. Path: (null) (00000000-0000-0000-0000-000000000000) [Permission denied]


Version-Release number of selected component (if applicable):
Gluster fs Version 3.7.9 running on OpenSuSE 13.2

How reproducible:
Hard to reproduce. Some random files generate permission denied while accessing
them.

Additional info:
None of those files are new files, so it's not the same as the other bug. Also
quota is disabled. This only happens on one server, other 3 servers do not
exhibit the same issue.

I have recreated the entire volume after upgrading to 3.7.9 from 3.7.4 due to
other issues. This server had the same problem in the past.

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