sqlplus failing when running from Gluster mountpoint

Issue

When running using a shared filesystem that is coming from a NAS (Sun ZFS storage) it works without problem.

There is also no problem, when the FS is on a local LV.

# mount Sun:/export/appropriate /user/oracle/shared
# df -hT /user/oracle/shared
Filesystem                                 Type  Size  Used Avail Use% Mounted on
Sun:/export/appropriate nfs4  250G   80G  171G  32% /user/oracle/shared
# /user/oracle/shared/.../bin/sqlplus user/password

SQL*Plus: Release 10.1.0.5.0 - Production on Tue Sep 13 17:37:52 2016

Copyright (c) 1982, 2005, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

=-=-=-=-=
However, when using a share volume that is coming from the Red Hat Gluster Storage, it does not work:

Mounting the volume as NFS client:

# umount /user/oracle/shared
# mount node:/qa_shared /user/oracle/shared
# df -hT /user/oracle/shared
Filesystem                                  Type  Size  Used Avail Use% Mounted on
node:/qa_shared nfs   250G   80G  171G  32% /user/oracle/shared
# /user/oracle/shared/.../bin/sqlplus user/password

SQL*Plus: Release 10.1.0.5.0 - Production on Tue Sep 13 17:40:46 2016

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified


Enter user-name: ^C